Re: To cast or not to cast?

Hmm... Not sure. I would cast it to byte array just in case. You can also
try SqlDbType.Image.
And make sure array size is OK before it's added to the SQL.

Best regards,

Ilya

This posting is provided "AS IS" with no warranties, and confers no rights.
--------------------
> From: "Jeremy" <jezonline@xxxxxxxxxxx>
> References: <umEpDi8OFHA.3880@xxxxxxxxxxxxxxxxxxxx>
<64$0lp9OFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
<#t8wc#BPFHA.1268@xxxxxxxxxxxxxxxxxxxx>
<tz30okGPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
<eTuV9uUPFHA.2568@xxxxxxxxxxxxxxxxxxxx>
<SN73xxVPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
<#Hr63aWPFHA.3336@xxxxxxxxxxxxxxxxxxxx>
<VMZf79WPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
<Oo3kPTgPFHA.580@xxxxxxxxxxxxxxxxxxxx>
<MFm$3ThPFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
<O13JLjhPFHA.2252@xxxxxxxxxxxxxxxxxxxx> <4259bdf6$1@xxxxxxxxxxxxxxxxxx>
<uzZB9okPFHA.3704@xxxxxxxxxxxxxxxxxxxx> <425a0dcf@xxxxxxxxxxxxxxxxxx>
<exZU78uPFHA.1476@xxxxxxxxxxxxxxxxxxxx>
<T4E5kJvPFHA.3136@xxxxxxxxxxxxxxxxxxxxx>
<#jAmwQ8PFHA.3988@xxxxxxxxxxxxxxxxxxxx>
<FLhBYo9PFHA.3136@xxxxxxxxxxxxxxxxxxxxx>
<eJDCyYJQFHA.3988@xxxxxxxxxxxxxxxxxxxx>
<Ttst4oKQFHA.10920@xxxxxxxxxxxxxxxxxxxxx>
<uQJ6HiNQFHA.4020@xxxxxxxxxxxxxxxxxxxx>
<OUSV#4RQFHA.3136@xxxxxxxxxxxxxxxxxxxxx>
> Subject: Re: To cast or not to cast?
> Date: Fri, 15 Apr 2005 01:41:18 +0100
> Lines: 1172
> X-Priority: 3
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> X-Newsreader: Microsoft Outlook Express 6.00.2800.1478
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> Message-ID: <#RtG0PVQFHA.3404@xxxxxxxxxxxxxxxxxxxx>
> Newsgroups: microsoft.public.dotnet.framework.compactframework
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> Path:
TK2MSFTNGXA02.phx.gbl!TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP1
2.phx.gbl
> Xref: TK2MSFTNGXA02.phx.gbl
microsoft.public.dotnet.framework.compactframework:75583
> X-Tomcat-NG: microsoft.public.dotnet.framework.compactframework
>
> I appreciate your patience, really.
>
> I'm certain (I think..) that the biometricdata is not correctly inserted
in
> SQL. I know that the marshal copying from pointer to byte[] went ok
(tested
> that out).
>
> This is what I get for biometricdata when in debug mode as soon as I get
it
> out of SQL:
>
> bioData[8]
> {Length=1}
> [0]: 144
>
> This is not normal, right? (this is more of a rethorical question I
> guess..) - I insert data in the SQL using OleDbType.VarBinary (as
suggested)
> and simply provide the data as an object (no casting). Did I skip a
crucial
> step somewhere ?
>
>
> ""Ilya Tumanov [MS]"" <ilyatum@xxxxxxxxxxxxxxxxxxxx> wrote in message
> news:OUSV%234RQFHA.3136@xxxxxxxxxxxxxxxxxxxxxxxx
> > Assuming your array is 1040 (gee, that reminds me of something.) bytes
in
> > size, why should byte 1995 at this pointer be empty (zero)?
> > This array is located in memory and probably surrounded by other stuff
> > allocated by the same or other programs.
> > If you get out of array bounds, you would read (or worse - write to)
stuff
> > which is not yours, but it does not have to be empty.
> >
> > That's a very common problem in C/C++ development because there's no way
> to
> > know the size of memory pointer is pointing to.
> > Usually this size is either fixed or provided separately (as separate
> > argument or filed in the structure).
> > You should use a spec of the function you're calling to find out the
right
> > size.
> >
> > Best regards,
> >
> > Ilya
> >
> > This posting is provided "AS IS" with no warranties, and confers no
> rights.
> > --------------------
> > > From: "Jeremy" <jezonline@xxxxxxxxxxx>
> > > References: <umEpDi8OFHA.3880@xxxxxxxxxxxxxxxxxxxx>
> > <64$0lp9OFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > <#t8wc#BPFHA.1268@xxxxxxxxxxxxxxxxxxxx>
> > <tz30okGPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > <eTuV9uUPFHA.2568@xxxxxxxxxxxxxxxxxxxx>
> > <SN73xxVPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > <#Hr63aWPFHA.3336@xxxxxxxxxxxxxxxxxxxx>
> > <VMZf79WPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > <Oo3kPTgPFHA.580@xxxxxxxxxxxxxxxxxxxx>
> > <MFm$3ThPFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > <O13JLjhPFHA.2252@xxxxxxxxxxxxxxxxxxxx> <4259bdf6$1@xxxxxxxxxxxxxxxxxx>
> > <uzZB9okPFHA.3704@xxxxxxxxxxxxxxxxxxxx> <425a0dcf@xxxxxxxxxxxxxxxxxx>
> > <exZU78uPFHA.1476@xxxxxxxxxxxxxxxxxxxx>
> > <T4E5kJvPFHA.3136@xxxxxxxxxxxxxxxxxxxxx>
> > <#jAmwQ8PFHA.3988@xxxxxxxxxxxxxxxxxxxx>
> > <FLhBYo9PFHA.3136@xxxxxxxxxxxxxxxxxxxxx>
> > <eJDCyYJQFHA.3988@xxxxxxxxxxxxxxxxxxxx>
> > <Ttst4oKQFHA.10920@xxxxxxxxxxxxxxxxxxxxx>
> > > Subject: Re: To cast or not to cast?
> > > Date: Thu, 14 Apr 2005 10:57:53 +0100
> > > Lines: 988
> > > X-Priority: 3
> > > X-MSMail-Priority: Normal
> > > X-Newsreader: Microsoft Outlook Express 6.00.2800.1478
> > > X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1478
> > > Message-ID: <uQJ6HiNQFHA.4020@xxxxxxxxxxxxxxxxxxxx>
> > > Newsgroups: microsoft.public.dotnet.framework.compactframework
> > > NNTP-Posting-Host: host-84-9-101-26.bulldogdsl.com 84.9.101.26
> > > Path: TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!tk2msftngp13.phx.gbl
> > > Xref: TK2MSFTNGXA01.phx.gbl
> > microsoft.public.dotnet.framework.compactframework:26946
> > > X-Tomcat-NG: microsoft.public.dotnet.framework.compactframework
> > >
> > > correct - that did the trick! thanks for that. Now I can start
> eliminating
> > > the problems.. There seems to be trouble with copying the
biometricdata
> > from
> > > to a Byte array. As mentioned earlier, I thought the length of
> > > FirstBIRSample.BiometricData was 1040, however when I marshal copy
from
> > the
> > > pointer to Byte Array BiometricData that is of length [2000] (just for
> > > testing purposes) and I check the content of let's say [1995], using
> > > BiometricData[1995], guess what, it's not empty. It's a very sad
> thought.
> > >
> > > How can I check the length of the data the pointer is pointing to so
> that
> > I
> > > can create a Byte array of the correct length ? I suspect that is the
> > > problem.
> > >
> > > ""Ilya Tumanov [MS]"" <ilyatum@xxxxxxxxxxxxxxxxxxxx> wrote in message
> > > news:Ttst4oKQFHA.10920@xxxxxxxxxxxxxxxxxxxxxxxx
> > > > I suspect bioData[3] is an object. If so, you should cast it to
> whatever
> > > > type it is (e.g. Int32).
> > > > Next, cast it to whatever type you need:
> > > >
> > > > System.UInt16 formatowner = unchecked( (System.UInt16)
> > ((Int32)bioData[3])
> > > > );
> > > >
> > > > Best regards,
> > > >
> > > > Ilya
> > > >
> > > > This posting is provided "AS IS" with no warranties, and confers no
> > > rights.
> > > >
> > > > --------------------
> > > > > From: "Jeremy" <jezonline@xxxxxxxxxxx>
> > > > > References: <umEpDi8OFHA.3880@xxxxxxxxxxxxxxxxxxxx>
> > > > <64$0lp9OFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > > > <#t8wc#BPFHA.1268@xxxxxxxxxxxxxxxxxxxx>
> > > > <tz30okGPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > <eTuV9uUPFHA.2568@xxxxxxxxxxxxxxxxxxxx>
> > > > <SN73xxVPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > <#Hr63aWPFHA.3336@xxxxxxxxxxxxxxxxxxxx>
> > > > <VMZf79WPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > <Oo3kPTgPFHA.580@xxxxxxxxxxxxxxxxxxxx>
> > > > <MFm$3ThPFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > > > <O13JLjhPFHA.2252@xxxxxxxxxxxxxxxxxxxx>
> <4259bdf6$1@xxxxxxxxxxxxxxxxxx>
> > > > <uzZB9okPFHA.3704@xxxxxxxxxxxxxxxxxxxx>
<425a0dcf@xxxxxxxxxxxxxxxxxx>
> > > > <exZU78uPFHA.1476@xxxxxxxxxxxxxxxxxxxx>
> > > > <T4E5kJvPFHA.3136@xxxxxxxxxxxxxxxxxxxxx>
> > > > <#jAmwQ8PFHA.3988@xxxxxxxxxxxxxxxxxxxx>
> > > > <FLhBYo9PFHA.3136@xxxxxxxxxxxxxxxxxxxxx>
> > > > > Subject: Re: To cast or not to cast?
> > > > > Date: Thu, 14 Apr 2005 03:03:36 +0100
> > > > > Lines: 840
> > > > > X-Priority: 3
> > > > > X-MSMail-Priority: Normal
> > > > > X-Newsreader: Microsoft Outlook Express 6.00.2800.1478
> > > > > X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1478
> > > > > Message-ID: <eJDCyYJQFHA.3988@xxxxxxxxxxxxxxxxxxxx>
> > > > > Newsgroups: microsoft.public.dotnet.framework.compactframework
> > > > > NNTP-Posting-Host: host-84-9-101-26.bulldogdsl.com 84.9.101.26
> > > > > Path:
> TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!tk2msftngp13.phx.gbl
> > > > > Xref: TK2MSFTNGXA01.phx.gbl
> > > > microsoft.public.dotnet.framework.compactframework:26929
> > > > > X-Tomcat-NG: microsoft.public.dotnet.framework.compactframework
> > > > >
> > > > > can't get it through:/
> > > > >
> > > > > I ended up trying to store the value as int, which I guess would
> make
> > > > sense
> > > > > because an unsigned value cannot be stored in Sql, and the next
> thing
> > up
> > > I
> > > > > could find after smallint was int. Please tell me if I'm wrong. It
> > does
> > > > make
> > > > > sense to me..
> > > > >
> > > > > However, casting back to UInt16 really does not work. I'm doing
the
> > > > > following right now :
> > > > > System.UInt16 formatowner =
> (System.UInt16)(unchecked((bioData[3])));
> > > > >
> > > > > I checked the value of bioData[3], it's always 53242:
> > > > >
> > > > > bioData[3]
> > > > > {53242}
> > > > > System.ValueType: {System.Int32}
> > > > > m_value: 53242
> > > > > MaxValue: 2147483647
> > > > > MinValue: -2147483648
> > > > >
> > > > > I don't even think that I should use the unchecked() statement, I
> > guess
> > > > it's
> > > > > just for reassurance. Why would the following raise an invalid
cast
> > > > > exception?
> > > > >
> > > > > ""Ilya Tumanov [MS]"" <ilyatum@xxxxxxxxxxxxxxxxxxxx> wrote in
> message
> > > > > news:FLhBYo9PFHA.3136@xxxxxxxxxxxxxxxxxxxxxxxx
> > > > > > You can get data out of SQL CE as Int16 and cast it to UInt16
> using
> > > > > > unchecked().
> > > > > > Similarly, cast UInt16 to Int16 to store it.
> > > > > >
> > > > > > Another solution would be to declare valuables as signed and let
> > > native
> > > > > > code to do interpretation.
> > > > > > That might be problematic if you set values manually somewhere,
> but
> > it
> > > > can
> > > > > > be done with unchecked().
> > > > > > Or, you can use equivalent values. For example binary
> > representations
> > > of
> > > > > > 65535 unsigned and -1 signed for 16 bit values are exactly the
> same.
> > > > > >
> > > > > > Best regards,
> > > > > >
> > > > > > Ilya
> > > > > >
> > > > > > This posting is provided "AS IS" with no warranties, and confers
> no
> > > > > rights.
> > > > > >
> > > > > > --------------------
> > > > > > > From: "Jeremy" <jezonline@xxxxxxxxxxx>
> > > > > > > References: <umEpDi8OFHA.3880@xxxxxxxxxxxxxxxxxxxx>
> > > > > > <64$0lp9OFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > <#t8wc#BPFHA.1268@xxxxxxxxxxxxxxxxxxxx>
> > > > > > <tz30okGPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > <eTuV9uUPFHA.2568@xxxxxxxxxxxxxxxxxxxx>
> > > > > > <SN73xxVPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > <#Hr63aWPFHA.3336@xxxxxxxxxxxxxxxxxxxx>
> > > > > > <VMZf79WPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > <Oo3kPTgPFHA.580@xxxxxxxxxxxxxxxxxxxx>
> > > > > > <MFm$3ThPFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > <O13JLjhPFHA.2252@xxxxxxxxxxxxxxxxxxxx>
> > > <4259bdf6$1@xxxxxxxxxxxxxxxxxx>
> > > > > > <uzZB9okPFHA.3704@xxxxxxxxxxxxxxxxxxxx>
> > <425a0dcf@xxxxxxxxxxxxxxxxxx>
> > > > > > <exZU78uPFHA.1476@xxxxxxxxxxxxxxxxxxxx>
> > > > > > <T4E5kJvPFHA.3136@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > Subject: Re: To cast or not to cast?
> > > > > > > Date: Wed, 13 Apr 2005 02:00:11 +0100
> > > > > > > Lines: 686
> > > > > > > X-Priority: 3
> > > > > > > X-MSMail-Priority: Normal
> > > > > > > X-Newsreader: Microsoft Outlook Express 6.00.2800.1478
> > > > > > > X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1478
> > > > > > > Message-ID: <#jAmwQ8PFHA.3988@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > Newsgroups: microsoft.public.dotnet.framework.compactframework
> > > > > > > NNTP-Posting-Host: host-84-9-101-26.bulldogdsl.com 84.9.101.26
> > > > > > > Path:
> > > TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!tk2msftngp13.phx.gbl
> > > > > > > Xref: TK2MSFTNGXA01.phx.gbl
> > > > > > microsoft.public.dotnet.framework.compactframework:26864
> > > > > > > X-Tomcat-NG:
microsoft.public.dotnet.framework.compactframework
> > > > > > >
> > > > > > > the "unsafe" keyword worked great! vs doesn't complain
anymore.
> > > > > > >
> > > > > > > I'm trying to solve the UInt16 problem now. I followed your
> > previous
> > >
> > > > > > advice
> > > > > > > of using unchecked(). It still says that the value is too
small
> or
> > > too
> > > > > > large
> > > > > > > when trying to insert it in the DB using OleDbType.SmallInt
> (which
> > > > kind
> > > > > of
> > > > > > > makes sense seeing as the value is 53242).
> > > > > > >
> > > > > > > Any other ideas that could help ?
> > > > > > >
> > > > > > > ""Ilya Tumanov [MS]"" <ilyatum@xxxxxxxxxxxxxxxxxxxx> wrote in
> > > message
> > > > > > > news:T4E5kJvPFHA.3136@xxxxxxxxxxxxxxxxxxxxxxxx
> > > > > > > > Unsafe block won't eliminate type check (fortunately). You
> need
> > to
> > > > do
> > > > > > > > explicit cast:
> > > > > > > >
> > > > > > > > SecondBIRSample.BiometricData = (IntPtr32)BiometricDataPtr;
> > > > > > > >
> > > > > > > > First error means you need to declare this function with
> unsafe
> > > > > keyword
> > > > > > > and
> > > > > > > > use /unsafe compiler switch (can be set in project
> properties).
> > > > > > > >
> > > > > > > > public unsafe void DoUnsafeStuff() {
> > > > > > > > // Can do unsafe stuff here...
> > > > > > > > ..
> > > > > > > > }
> > > > > > > >
> > > > > > > > Best regards,
> > > > > > > >
> > > > > > > > Ilya
> > > > > > > >
> > > > > > > > This posting is provided "AS IS" with no warranties, and
> confers
> > > no
> > > > > > > rights.
> > > > > > > > --------------------
> > > > > > > > > From: "Jeremy" <jezonline@xxxxxxxxxxx>
> > > > > > > > > References: <umEpDi8OFHA.3880@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > <64$0lp9OFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > <#t8wc#BPFHA.1268@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > <tz30okGPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > <eTuV9uUPFHA.2568@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > <SN73xxVPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > <#Hr63aWPFHA.3336@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > <VMZf79WPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > <Oo3kPTgPFHA.580@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > <MFm$3ThPFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > <O13JLjhPFHA.2252@xxxxxxxxxxxxxxxxxxxx>
> > > > > <4259bdf6$1@xxxxxxxxxxxxxxxxxx>
> > > > > > > > <uzZB9okPFHA.3704@xxxxxxxxxxxxxxxxxxxx>
> > > > <425a0dcf@xxxxxxxxxxxxxxxxxx>
> > > > > > > > > Subject: Re: To cast or not to cast?
> > > > > > > > > Date: Tue, 12 Apr 2005 00:36:01 +0100
> > > > > > > > > Lines: 560
> > > > > > > > > X-Priority: 3
> > > > > > > > > X-MSMail-Priority: Normal
> > > > > > > > > X-Newsreader: Microsoft Outlook Express 6.00.2800.1478
> > > > > > > > > X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1478
> > > > > > > > > Message-ID: <exZU78uPFHA.1476@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > Newsgroups:
> microsoft.public.dotnet.framework.compactframework
> > > > > > > > > NNTP-Posting-Host: host-84-9-101-26.bulldogdsl.com
> 84.9.101.26
> > > > > > > > > Path:
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
TK2MSFTNGXA01.phx.gbl!TK2MSFTFEED01.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP0
> > > > > > > > 9.phx.gbl
> > > > > > > > > Xref: TK2MSFTNGXA01.phx.gbl
> > > > > > > > microsoft.public.dotnet.framework.compactframework:26785
> > > > > > > > > X-Tomcat-NG:
> > microsoft.public.dotnet.framework.compactframework
> > > > > > > > >
> > > > > > > > > I tried to follow you fixed() solution, but I get an error
> > > saying
> > > > > that
> > > > > > > > > "Pointers can only be used in an unsafe context" and
"Cannot
> > > > > > implicitly
> > > > > > > > > convert type void* to System.IntPtr.
> > > > > > > > >
> > > > > > > > > I've got the following down. I think the bit I'm missing
is
> > the
> > > > > > > assignment
> > > > > > > > > to IntPtr? And probably the casting as well.. Could you
> > explain
> > > > > though
> > > > > > > > what
> > > > > > > > > the compiler means by the first error? I understand that
> this
> > is
> > > > an
> > > > > > > unsafe
> > > > > > > > > block, so why does it complain?
> > > > > > > > >
> > > > > > > > > fixed(void* BiometricDataPtr = (byte[])(bioData[8]))
> > > > > > > > > {
> > > > > > > > > SecondBIRSample.BiometricData = BiometricDataPtr;
> > > > > > > > > }
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > "Ilya Tumanov [MS]" <ilyatum@xxxxxxxxxxxxxxxxxxxx> wrote
in
> > > > message
> > > > > > > > > news:425a0dcf@xxxxxxxxxxxxxxxxxxxxx
> > > > > > > > > > I can see two reasons:
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > 1. No need to free the memory after call is done.
> > > > > > > > > >
> > > > > > > > > > 2. No time wasted making temporary copy of something you
> > > already
> > > > > > have.
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > Best regards,
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > Ilya
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > This posting is provided "AS IS" with no warranties, and
> > > confers
> > > > > no
> > > > > > > > > rights.
> > > > > > > > > >
> > > > > > > > > > "Alex Feinman [MVP]" <public_news@xxxxxxxxxxxxxxx> wrote
> in
> > > > > message
> > > > > > > > > > news:uzZB9okPFHA.3704@xxxxxxxxxxxxxxxxxxxxxxx
> > > > > > > > > > > Why would one want to use unsafe blocks is beyond me,
> when
> > > it
> > > > is
> > > > > > so
> > > > > > > > easy
> > > > > > > > > > > to call LocalAlloc and Marshal.Copy
> > > > > > > > > > >
> > > > > > > > > > > --
> > > > > > > > > > > Alex Feinman
> > > > > > > > > > > ---
> > > > > > > > > > > Visit http://www.opennetcf.org
> > > > > > > > > > > "Ilya Tumanov [MS]" <ilyatum@xxxxxxxxxxxxxxxxxxxx>
wrote
> > in
> > > > > > message
> > > > > > > > > > > news:4259bdf6$1@xxxxxxxxxxxxxxxxxxxxx
> > > > > > > > > > >> It won't, but managed array (retrieved from SQL CE)
> > should
> > > be
> > > > > > > already
> > > > > > > > > > >> allocated.
> > > > > > > > > > >>
> > > > > > > > > > >>
> > > > > > > > > > >>
> > > > > > > > > > >> Best regards,
> > > > > > > > > > >>
> > > > > > > > > > >>
> > > > > > > > > > >>
> > > > > > > > > > >> Ilya
> > > > > > > > > > >>
> > > > > > > > > > >>
> > > > > > > > > > >>
> > > > > > > > > > >> This posting is provided "AS IS" with no warranties,
> and
> > > > > confers
> > > > > > no
> > > > > > > > > > >> rights.
> > > > > > > > > > >>
> > > > > > > > > > >>
> > > > > > > > > > >> "<ctacke/>" <ctacke_AT_OpenNETCF_com> wrote in
message
> > > > > > > > > > >> news:O13JLjhPFHA.2252@xxxxxxxxxxxxxxxxxxxxxxx
> > > > > > > > > > >>> Though fixed won't allocate any memory for you, so
> > you're
> > > > > still
> > > > > > > > where
> > > > > > > > > > >>> you were before.
> > > > > > > > > > >>>
> > > > > > > > > > >>> -Chris
> > > > > > > > > > >>>
> > > > > > > > > > >>>
> > > > > > > > > > >>> ""Ilya Tumanov [MS]"" <ilyatum@xxxxxxxxxxxxxxxxxxxx>
> > wrote
> > > > in
> > > > > > > > message
> > > > > > > > > > >>> news:MFm$3ThPFHA.1564@xxxxxxxxxxxxxxxxxxxxxxxx
> > > > > > > > > > >>>> You don't need to do anything to pin memory with
> > fixed(),
> > > > > > fixed()
> > > > > > > > > will
> > > > > > > > > > >>>> do
> > > > > > > > > > >>>> it for you:
> > > > > > > > > > >>>>
> > > > > > > > > > >>>> fixed(void *ArrayPointer = MyManagedArray) {
> > > > > > > > > > >>>> // MyManagedArray is pinned within fixed block and
> > > > > ArrayPointer
> > > > > > > > > points
> > > > > > > > > > >>>> to
> > > > > > > > > > >>>> it.
> > > > > > > > > > >>>> // Assign it to IntPtr (might need some casting)
and
> > call
> > > > > > native
> > > > > > > > > > >>>> function
> > > > > > > > > > >>>> within this block.
> > > > > > > > > > >>>> }
> > > > > > > > > > >>>>
> > > > > > > > > > >>>> // MyManagedArray in longer pinned...
> > > > > > > > > > >>>>
> > > > > > > > > > >>>> Best regards,
> > > > > > > > > > >>>>
> > > > > > > > > > >>>> Ilya
> > > > > > > > > > >>>>
> > > > > > > > > > >>>> This posting is provided "AS IS" with no
warranties,
> > and
> > > > > > confers
> > > > > > > no
> > > > > > > > > > >>>> rights.
> > > > > > > > > > >>>> --------------------
> > > > > > > > > > >>>>> From: "Jeremy" <jezonline@xxxxxxxxxxx>
> > > > > > > > > > >>>>> References:
<umEpDi8OFHA.3880@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>> <64$0lp9OFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>> <#t8wc#BPFHA.1268@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>> <tz30okGPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>> <eTuV9uUPFHA.2568@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>> <SN73xxVPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>> <#Hr63aWPFHA.3336@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>> <VMZf79WPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> Subject: Re: To cast or not to cast?
> > > > > > > > > > >>>>> Date: Sun, 10 Apr 2005 20:37:43 +0100
> > > > > > > > > > >>>>> Lines: 335
> > > > > > > > > > >>>>> X-Priority: 3
> > > > > > > > > > >>>>> X-MSMail-Priority: Normal
> > > > > > > > > > >>>>> X-Newsreader: Microsoft Outlook Express
> 6.00.2800.1478
> > > > > > > > > > >>>>> X-MimeOLE: Produced By Microsoft MimeOLE
> > V6.00.2800.1478
> > > > > > > > > > >>>>> Message-ID: <Oo3kPTgPFHA.580@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> Newsgroups:
> > > > > microsoft.public.dotnet.framework.compactframework
> > > > > > > > > > >>>>> NNTP-Posting-Host: host-84-9-101-26.bulldogdsl.com
> > > > > 84.9.101.26
> > > > > > > > > > >>>>> Path:
> > > > > > > > >
> > TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP15.phx.gbl
> > > > > > > > > > >>>>> Xref: TK2MSFTNGXA01.phx.gbl
> > > > > > > > > > >>>>
> > microsoft.public.dotnet.framework.compactframework:26681
> > > > > > > > > > >>>>> X-Tomcat-NG:
> > > > > > microsoft.public.dotnet.framework.compactframework
> > > > > > > > > > >>>>>
> > > > > > > > > > >>>>> I did a little bit of research because I'm a
newbie
> > > > > regarding
> > > > > > > > > > >>>>> pointers/memory allocation. I found an interesting
> > post
> > > by
> > > > > > Brian
> > > > > > > > > > >>>>> Smith:
> > > > > > > > > > >>>>>
> > > > > > > > > > >>>>
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
http://groups-beta.google.com/group/microsoft.public.dotnet.framework.compac
> > > > > > > > > > >>>>
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
tframework/browse_frm/thread/d628847ac90ac8a3/b92cb386364174f7?q=unmanaged+a
> > > > > > > > > > >>>> llocate+memory&rnum=10#b92cb386364174f7
> > > > > > > > > > >>>>>
> > > > > > > > > > >>>>> I supose I could use LocalAlloc to allocate
memory.
> > The
> > > > post
> > > > > > > seems
> > > > > > > > > to
> > > > > > > > > > >>>>> be
> > > > > > > > > > >>>>> similar to my problem but I still don't understand
> how
> > > to
> > > > > pin
> > > > > > > > > managed
> > > > > > > > > > >>>> memory
> > > > > > > > > > >>>>> (by using Fixed()?), and have a pointer point to
> the
> > > byte
> > > > > > array
> > > > > > > > > > >>>>> (which is
> > > > > > > > > > >>>>> probably what I would want to do) ?
> > > > > > > > > > >>>>>
> > > > > > > > > > >>>>> your help is really appreciated!
> > > > > > > > > > >>>>>
> > > > > > > > > > >>>>> ""Ilya Tumanov [MS]""
<ilyatum@xxxxxxxxxxxxxxxxxxxx>
> > > wrote
> > > > > in
> > > > > > > > > message
> > > > > > > > > > >>>>> news:VMZf79WPFHA.920@xxxxxxxxxxxxxxxxxxxxxxxx
> > > > > > > > > > >>>>> > Creating a new pointer is not enough. You need
to
> > > > allocate
> > > > > > > > memory
> > > > > > > > > > >>>>> > and
> > > > > > > > > > >>>>> > assign value pointing to it to the pointer.
> > > > > > > > > > >>>>> > You might allocate native memory via P/Invoke
> (which
> > > you
> > > > > > would
> > > > > > > > > have
> > > > > > > > > > >>>>> > to
> > > > > > > > > > >>>>> free
> > > > > > > > > > >>>>> > at some point).
> > > > > > > > > > >>>>> > Or, you can obtain a pointer to a managed array
> you
> > > > > already
> > > > > > > > have.
> > > > > > > > > > >>>>> > Before you pass this pointer to a native code,
you
> > > have
> > > > to
> > > > > > pin
> > > > > > > > > > >>>>> > managed
> > > > > > > > > > >>>>> > memory so GC won't move the array.
> > > > > > > > > > >>>>> > You can use GCHandle class for it or you can use
> > > unsafe
> > > > > > code.
> > > > > > > > > > >>>>> > I would recommend using Fixed() with unsafe
> pointer.
> > > > That
> > > > > > > would
> > > > > > > > > pin
> > > > > > > > > > >>>>> > and
> > > > > > > > > > >>>>> > unpin the array automatically.
> > > > > > > > > > >>>>> > GCHandle has a bug (returns incorrect pointer -
> > > there's
> > > > a
> > > > > > > > > > >>>>> > workaround)
> > > > > > > > > > >>>> and
> > > > > > > > > > >>>>> > it's not automatic.
> > > > > > > > > > >>>>> >
> > > > > > > > > > >>>>> > Best regards,
> > > > > > > > > > >>>>> >
> > > > > > > > > > >>>>> > Ilya
> > > > > > > > > > >>>>> >
> > > > > > > > > > >>>>> > This posting is provided "AS IS" with no
> warranties,
> > > and
> > > > > > > confers
> > > > > > > > > no
> > > > > > > > > > >>>>> rights.
> > > > > > > > > > >>>>> >
> > > > > > > > > > >>>>> > --------------------
> > > > > > > > > > >>>>> > > From: "Jeremy" <jezonline@xxxxxxxxxxx>
> > > > > > > > > > >>>>> > > References:
> > <umEpDi8OFHA.3880@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > <64$0lp9OFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > <#t8wc#BPFHA.1268@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > <tz30okGPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > <eTuV9uUPFHA.2568@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > <SN73xxVPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > > Subject: Re: To cast or not to cast?
> > > > > > > > > > >>>>> > > Date: Sun, 10 Apr 2005 01:46:03 +0100
> > > > > > > > > > >>>>> > > Lines: 240
> > > > > > > > > > >>>>> > > X-Priority: 3
> > > > > > > > > > >>>>> > > X-MSMail-Priority: Normal
> > > > > > > > > > >>>>> > > X-Newsreader: Microsoft Outlook Express
> > > 6.00.2800.1478
> > > > > > > > > > >>>>> > > X-MimeOLE: Produced By Microsoft MimeOLE
> > > > V6.00.2800.1478
> > > > > > > > > > >>>>> > > Message-ID:
> > <#Hr63aWPFHA.3336@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > > Newsgroups:
> > > > > > > microsoft.public.dotnet.framework.compactframework
> > > > > > > > > > >>>>> > > NNTP-Posting-Host:
> host-84-9-101-26.bulldogdsl.com
> > > > > > > 84.9.101.26
> > > > > > > > > > >>>>> > > Path:
> > > > > > > > > > >>>>> > >
> > > > > > > >
> TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP10.phx.gbl
> > > > > > > > > > >>>>> > > Xref: TK2MSFTNGXA01.phx.gbl
> > > > > > > > > > >>>>> >
> > > microsoft.public.dotnet.framework.compactframework:26658
> > > > > > > > > > >>>>> > > X-Tomcat-NG:
> > > > > > > > microsoft.public.dotnet.framework.compactframework
> > > > > > > > > > >>>>> > >
> > > > > > > > > > >>>>> > > Okay, so I used the 1040 length, it doesn't
seem
> > to
> > > > > > > complain,
> > > > > > > > > > >>>>> > > which is
> > > > > > > > > > >>>>> > good
> > > > > > > > > > >>>>> > > news I guess. To make sure it stores the data
> > > > correctly
> > > > > > I'm
> > > > > > > > > trying
> > > > > > > > > > >>>>> > > to
> > > > > > > > > > >>>>> > > retrieve it and feed it back to the biometric
> > > template
> > > > > > > > matching
> > > > > > > > > > >>>> method.
> > > > > > > > > > >>>>> > >
> > > > > > > > > > >>>>> > > Because it takes IntPtr's for BiometricData
and
> > > > > > Signature, I
> > > > > > > > > tried
> > > > > > > > > > >>>>> > creating
> > > > > > > > > > >>>>> > > new pointers and marshal copy the content
that I
> > > > > retrieved
> > > > > > > > > earlier
> > > > > > > > > > >>>> into
> > > > > > > > > > >>>>> > > these pointers. I failed. I tried the
following:
> > > > > > > > > > >>>>> > >
> > > > > > > > > > >>>>> > > System.IntPtr BiometricDataPtr;//create new
> > pointer
> > > > > > > > > > >>>>> > > BiometricData =
> (byte[])bioData[8];//BiometricData
> > > is
> > > > an
> > > > > > > array
> > > > > > > > > of
> > > > > > > > > > >>>>> > > type
> > > > > > > > > > >>>>> > byte
> > > > > > > > > > >>>>> > > Marshal.Copy(BiometricData, 0,
BiometricDataPtr,
> > > > > > > 1040);//copy
> > > > > > > > > > >>>>> > > content
> > > > > > > > > > >>>> of
> > > > > > > > > > >>>>> > > BiometricData in an IntPtr
> > > > > > > > > > >>>>> > >
> > > > > > > > > > >>>>> > > "Use of unassigned local variable
> > > 'BiometricDataPtr'."
> > > > > > > > > > >>>>> > > Obvsiously it's unused, it's meant to point to
> > > > > > something...
> > > > > > > > what
> > > > > > > > > > >>>>> > > am I
> > > > > > > > > > >>>>> > > missing here?
> > > > > > > > > > >>>>> > >
> > > > > > > > > > >>>>> > > ""Ilya Tumanov [MS]""
> > <ilyatum@xxxxxxxxxxxxxxxxxxxx>
> > > > > wrote
> > > > > > > in
> > > > > > > > > > >>>>> > > message
> > > > > > > > > > >>>>> > > news:SN73xxVPFHA.920@xxxxxxxxxxxxxxxxxxxxxxxx
> > > > > > > > > > >>>>> > > > You should not guess the length, you should
> know
> > > it.
> > > > > It
> > > > > > > > might
> > > > > > > > > be
> > > > > > > > > > >>>> fixed
> > > > > > > > > > >>>>> > or
> > > > > > > > > > >>>>> > > > native code could return it somehow.
> > > > > > > > > > >>>>> > > > Most likely you're correct and
> > > FirstBIRSample.Length
> > > > > > > > contains
> > > > > > > > > > >>>>> > > > this
> > > > > > > > > > >>>>> size.
> > > > > > > > > > >>>>> > > > You should check out the documentation for
the
> > > > > function
> > > > > > > > you're
> > > > > > > > > > >>>> calling
> > > > > > > > > > >>>>> > to
> > > > > > > > > > >>>>> > > > make sure it's correct.
> > > > > > > > > > >>>>> > > >
> > > > > > > > > > >>>>> > > > If value of a pointer is 0, it's null
pointer.
> > It
> > > > > means
> > > > > > > this
> > > > > > > > > > >>>>> > > > pointer
> > > > > > > > > > >>>>> is
> > > > > > > > > > >>>>> > > not
> > > > > > > > > > >>>>> > > > valid and points to nothing.
> > > > > > > > > > >>>>> > > > Since no data is available, you could store
it
> > as
> > > > > > DBNull.
> > > > > > > > > > >>>>> > > >
> > > > > > > > > > >>>>> > > > Best regards,
> > > > > > > > > > >>>>> > > >
> > > > > > > > > > >>>>> > > > Ilya
> > > > > > > > > > >>>>> > > >
> > > > > > > > > > >>>>> > > > This posting is provided "AS IS" with no
> > > warranties,
> > > > > and
> > > > > > > > > confers
> > > > > > > > > > >>>>> > > > no
> > > > > > > > > > >>>>> > > rights.
> > > > > > > > > > >>>>> > > >
> > > > > > > > > > >>>>> > > > --------------------
> > > > > > > > > > >>>>> > > > > From: "Jeremy" <jezonline@xxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > > References:
> > > > <umEpDi8OFHA.3880@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > <64$0lp9OFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > <#t8wc#BPFHA.1268@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > <tz30okGPFHA.920@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > > Subject: Re: To cast or not to cast?
> > > > > > > > > > >>>>> > > > > Date: Sat, 9 Apr 2005 22:32:29 +0100
> > > > > > > > > > >>>>> > > > > Lines: 159
> > > > > > > > > > >>>>> > > > > X-Priority: 3
> > > > > > > > > > >>>>> > > > > X-MSMail-Priority: Normal
> > > > > > > > > > >>>>> > > > > X-Newsreader: Microsoft Outlook Express
> > > > > 6.00.2800.1478
> > > > > > > > > > >>>>> > > > > X-MimeOLE: Produced By Microsoft MimeOLE
> > > > > > V6.00.2800.1478
> > > > > > > > > > >>>>> > > > > Message-ID:
> > > > <eTuV9uUPFHA.2568@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > > Newsgroups:
> > > > > > > > > microsoft.public.dotnet.framework.compactframework
> > > > > > > > > > >>>>> > > > > NNTP-Posting-Host:
> > > host-84-9-101-26.bulldogdsl.com
> > > > > > > > > 84.9.101.26
> > > > > > > > > > >>>>> > > > > Path:
> > > > > > > > > > >>>>>
> > > > > > TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP14.phx.gbl
> > > > > > > > > > >>>>> > > > > Xref: TK2MSFTNGXA01.phx.gbl
> > > > > > > > > > >>>>> > > >
> > > > > microsoft.public.dotnet.framework.compactframework:26653
> > > > > > > > > > >>>>> > > > > X-Tomcat-NG:
> > > > > > > > > > >>>>> > > > >
> > > microsoft.public.dotnet.framework.compactframework
> > > > > > > > > > >>>>> > > > >
> > > > > > > > > > >>>>> > > > > Thanks a lot for that! Before going to the
> > > UInt16
> > > > > > > > problem, I
> > > > > > > > > > >>>> better
> > > > > > > > > > >>>>> > try
> > > > > > > > > > >>>>> > > to
> > > > > > > > > > >>>>> > > > > solve that IntPtr problem.
> > > > > > > > > > >>>>> > > > >
> > > > > > > > > > >>>>> > > > > Managed to use Marshal.Copy. Not sure how
I
> > > should
> > > > > > > 'guess'
> > > > > > > > > the
> > > > > > > > > > >>>>> length
> > > > > > > > > > >>>>> > of
> > > > > > > > > > >>>>> > > > the
> > > > > > > > > > >>>>> > > > > Byte array to copy to. When I type
> > > > > > > > > > >>>>> > > > > FirstBIRSample.BiometricData
> > > > > > > > > > >>>>> (which
> > > > > > > > > > >>>>> > > is
> > > > > > > > > > >>>>> > > > > the IntPtr) in the command window, it
> returns
> > to
> > > > me:
> > > > > > > > > 2372256 -
> > > > > > > > > > >>>>> > > > > is
> > > > > > > > > > >>>>> this
> > > > > > > > > > >>>>> > > the
> > > > > > > > > > >>>>> > > > > size?
> > > > > > > > > > >>>>> > > > > I 'assumed' the size would be 1040 (which
is
> > > > stored
> > > > > in
> > > > > > > > > > >>>>> > > > > FirstBIRSample.Length).
> > > > > > > > > > >>>>> > > > >
> > > > > > > > > > >>>>> > > > > Second Part: Seems like the
> > > > FirstBIRSample.Signature
> > > > > > > > (also a
> > > > > > > > > > >>>>> pointer)
> > > > > > > > > > >>>>> > is
> > > > > > > > > > >>>>> > > > 0,
> > > > > > > > > > >>>>> > > > > how should I store this?
> > > > > > > > > > >>>>> > > > >
> > > > > > > > > > >>>>> > > > > Thanks so much!
> > > > > > > > > > >>>>> > > > >
> > > > > > > > > > >>>>> > > > > ""Ilya Tumanov [MS]""
> > > > <ilyatum@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > wrote
> > > > > > > > > in
> > > > > > > > > > >>>>> message
> > > > > > > > > > >>>>> > > > >
> news:tz30okGPFHA.920@xxxxxxxxxxxxxxxxxxxxxxxx
> > > > > > > > > > >>>>> > > > > > While storing UInt16 as Int is OK, it
will
> > > take
> > > > > more
> > > > > > > > > space.
> > > > > > > > > > >>>>> > > > > > The
> > > > > > > > > > >>>>> > > problem
> > > > > > > > > > >>>>> > > > > > you're having is caused by range check.
> You
> > > > might
> > > > > > > > consider
> > > > > > > > > > >>>>> > > > > > using
> > > > > > > > > > >>>>> > > > > > unchecked() to disable it.
> > > > > > > > > > >>>>> > > > > >
> > > > > > > > > > >>>>> > > > > > System.Runtime.InteropServices.Marshal
> class
> > > > > allows
> > > > > > > you
> > > > > > > > to
> > > > > > > > > > >>>>> > > > > > copy
> > > > > > > > > > >>>>> data
> > > > > > > > > > >>>>> > > > from
> > > > > > > > > > >>>>> > > > > > the pointer to the array. Look into
Copy()
> > > > methods
> > > > > > of
> > > > > > > > that
> > > > > > > > > > >>>> class.
> > > > > > > > > > >>>>> > > > > >
> > > > > > > > > > >>>>> > > > > > Best regards,
> > > > > > > > > > >>>>> > > > > >
> > > > > > > > > > >>>>> > > > > > Ilya
> > > > > > > > > > >>>>> > > > > >
> > > > > > > > > > >>>>> > > > > > This posting is provided "AS IS" with no
> > > > > warranties,
> > > > > > > and
> > > > > > > > > > >>>>> > > > > > confers
> > > > > > > > > > >>>>> no
> > > > > > > > > > >>>>> > > > > rights.
> > > > > > > > > > >>>>> > > > > > --------------------
> > > > > > > > > > >>>>> > > > > > > From: "Jeremy" <jezonline@xxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > > > > References:
> > > > > > <umEpDi8OFHA.3880@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > > > <64$0lp9OFHA.1564@xxxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > > > > Subject: Re: To cast or not to cast?
> > > > > > > > > > >>>>> > > > > > > Date: Fri, 8 Apr 2005 10:44:39 +0100
> > > > > > > > > > >>>>> > > > > > > Lines: 91
> > > > > > > > > > >>>>> > > > > > > X-Priority: 3
> > > > > > > > > > >>>>> > > > > > > X-MSMail-Priority: Normal
> > > > > > > > > > >>>>> > > > > > > X-Newsreader: Microsoft Outlook
Express
> > > > > > > 6.00.2800.1478
> > > > > > > > > > >>>>> > > > > > > X-MimeOLE: Produced By Microsoft
MimeOLE
> > > > > > > > V6.00.2800.1478
> > > > > > > > > > >>>>> > > > > > > Message-ID:
> > > > > > <#t8wc#BPFHA.1268@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > > > > Newsgroups:
> > > > > > > > > > >>>>> > > > > > >
> > > > > microsoft.public.dotnet.framework.compactframework
> > > > > > > > > > >>>>> > > > > > > NNTP-Posting-Host:
> > > > > host-84-9-101-26.bulldogdsl.com
> > > > > > > > > > >>>>> > > > > > > 84.9.101.26
> > > > > > > > > > >>>>> > > > > > > Path:
> > > > > > > > > > >>>>> > >
> > > > > > > >
> TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP14.phx.gbl
> > > > > > > > > > >>>>> > > > > > > Xref: TK2MSFTNGXA01.phx.gbl
> > > > > > > > > > >>>>> > > > > >
> > > > > > > microsoft.public.dotnet.framework.compactframework:26572
> > > > > > > > > > >>>>> > > > > > > X-Tomcat-NG:
> > > > > > > > > > >>>> microsoft.public.dotnet.framework.compactframework
> > > > > > > > > > >>>>> > > > > > >
> > > > > > > > > > >>>>> > > > > > > Thanks so much for the replies Alex
and
> > > Ilya!
> > > > > > > > > > >>>>> > > > > > >
> > > > > > > > > > >>>>> > > > > > > I changed the types in sql. It wasn't
> > happy
> > > > with
> > > > > > > > Uint16
> > > > > > > > > > >>>>> > > > > > > mapped
> > > > > > > > > > >>>>> to
> > > > > > > > > > >>>>> > > > > smallint
> > > > > > > > > > >>>>> > > > > > > (sql says value is either too small or
> too
> > > > > large),
> > > > > > > so
> > > > > > > > I
> > > > > > > > > > >>>>> > > > > > > just
> > > > > > > > > > >>>>> went
> > > > > > > > > > >>>>> > > for
> > > > > > > > > > >>>>> > > > an
> > > > > > > > > > >>>>> > > > > > > int.
> > > > > > > > > > >>>>> > > > > > >
> > > > > > > > > > >>>>> > > > > > > Not sure how to retrieve the data data
> an
> > > > IntPtr
> > > > > > is
> > > > > > > > > > >>>>> > > > > > > pointing
> > > > > > > > > > >>>> to
> > > > > > > > > > >>>>> > > > though.
> > > > > > > > > > >>>>> > > > > > How
> > > > > > > > > > >>>>> > > > > > > can I get that data as a byte array?
> > > > > > > > > > >>>>> > > > > > >
> > > > > > > > > > >>>>> > > > > > > thanks so much again!
> > > > > > > > > > >>>>> > > > > > >
> > > > > > > > > > >>>>> > > > > > > ""Ilya Tumanov [MS]""
> > > > > > <ilyatum@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > wrote
> > > > > > > > > > >>>>> > > > > > > in
> > > > > > > > > > >>>>> > > message
> > > > > > > > > > >>>>> > > > > > >
> > > news:64$0lp9OFHA.1564@xxxxxxxxxxxxxxxxxxxxxxxx
> > > > > > > > > > >>>>> > > > > > > >
> > > > > > > > > > >>>>> > > > > > >
> > > > > > > > > > >>>>> > > > > >
> > > > > > > > > > >>>>> > > > >
> > > > > > > > > > >>>>> > > >
> > > > > > > > > > >>>>> > >
> > > > > > > > > > >>>>> >
> > > > > > > > > > >>>>>
> > > > > > > > > > >>>>
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/
> > > > > > > > > > >>>>> > > > > > > >
frlrfsystemdatasqldbtypeclasstopic.asp
> > > > > > > > > > >>>>> > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > UInt32: Int will do. Signed and
> Unsigned
> > > > > > integers
> > > > > > > > are
> > > > > > > > > > >>>> actually
> > > > > > > > > > >>>>> > the
> > > > > > > > > > >>>>> > > > > same;
> > > > > > > > > > >>>>> > > > > > > > just cast them to the right type.
> > > > > > > > > > >>>>> > > > > > > > UInt16: SmallInt, see warning above
> > > > > > > > > > >>>>> > > > > > > > Byte: TinyInt
> > > > > > > > > > >>>>> > > > > > > > BioAPI_*: look up underlying type
> > > definition
> > > > > and
> > > > > > > use
> > > > > > > > > it.
> > > > > > > > > > >>>> Enums
> > > > > > > > > > >>>>> > are
> > > > > > > > > > >>>>> > > > > Int32
> > > > > > > > > > >>>>> > > > > > > by
> > > > > > > > > > >>>>> > > > > > > > default.
> > > > > > > > > > >>>>> > > > > > > > IntPtr: it's Int32, so store it as
> Int.
> > > > > > > > > > >>>>> > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > Note, however, it's probably
pointless
> > to
> > > > > store
> > > > > > > > > pointers
> > > > > > > > > > >>>>> > > > > > > > in
> > > > > > > > > > >>>>> the
> > > > > > > > > > >>>>> > > data
> > > > > > > > > > >>>>> > > > > > base.
> > > > > > > > > > >>>>> > > > > > > > Pointer itself is not important,
most
> > > likely
> > > > > you
> > > > > > > > need
> > > > > > > > > to
> > > > > > > > > > >>>> store
> > > > > > > > > > >>>>> > > > > whatever
> > > > > > > > > > >>>>> > > > > > > > it's pointing to.
> > > > > > > > > > >>>>> > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > Best regards,
> > > > > > > > > > >>>>> > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > Ilya
> > > > > > > > > > >>>>> > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > This posting is provided "AS IS"
with
> no
> > > > > > > warranties,
> > > > > > > > > and
> > > > > > > > > > >>>>> confers
> > > > > > > > > > >>>>> > > no
> > > > > > > > > > >>>>> > > > > > > rights.
> > > > > > > > > > >>>>> > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > --------------------
> > > > > > > > > > >>>>> > > > > > > > > From: "Jeremy"
> <jezonline@xxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > > > > > > Subject: To cast or not to cast?
> > > > > > > > > > >>>>> > > > > > > > > Date: Fri, 8 Apr 2005 00:21:17
+0100
> > > > > > > > > > >>>>> > > > > > > > > Lines: 25
> > > > > > > > > > >>>>> > > > > > > > > X-Priority: 3
> > > > > > > > > > >>>>> > > > > > > > > X-MSMail-Priority: Normal
> > > > > > > > > > >>>>> > > > > > > > > X-Newsreader: Microsoft Outlook
> > Express
> > > > > > > > > 6.00.2800.1478
> > > > > > > > > > >>>>> > > > > > > > > X-MimeOLE: Produced By Microsoft
> > MimeOLE
> > > > > > > > > > >>>>> > > > > > > > > V6.00.2800.1478
> > > > > > > > > > >>>>> > > > > > > > > Message-ID:
> > > > > > > > <umEpDi8OFHA.3880@xxxxxxxxxxxxxxxxxxxx>
> > > > > > > > > > >>>>> > > > > > > > > Newsgroups:
> > > > > > > > > > >>>>> microsoft.public.dotnet.framework.compactframework
> > > > > > > > > > >>>>> > > > > > > > > NNTP-Posting-Host:
> > > > > > > host-84-9-101-26.bulldogdsl.com
> > > > > > > > > > >>>>> 84.9.101.26
> > > > > > > > > > >>>>> > > > > > > > > Path:
> > > > > > > > > > >>>>> > > > >
> > > > > > > > >
> > TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!tk2msftngp13.phx.gbl
> > > > > > > > > > >>>>> > > > > > > > > Xref: TK2MSFTNGXA01.phx.gbl
> > > > > > > > > > >>>>> > > > > > > >
> > > > > > > > > microsoft.public.dotnet.framework.compactframework:26546
> > > > > > > > > > >>>>> > > > > > > > > X-Tomcat-NG:
> > > > > > > > > > >>>>> >
microsoft.public.dotnet.framework.compactframework
> > > > > > > > > > >>>>> > > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > > Hi,
> > > > > > > > > > >>>>> > > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > > I'm trying to convert the
following
> > > types
> > > > > into
> > > > > > > > types
> > > > > > > > > > >>>>> > > > > > > > > that
> > > > > > > > > > >>>> I
> > > > > > > > > > >>>>> > can
> > > > > > > > > > >>>>> > > > > insert
> > > > > > > > > > >>>>> > > > > > > in
> > > > > > > > > > >>>>> > > > > > > > an
> > > > > > > > > > >>>>> > > > > > > > > SQL database (via a webservice).
> None
> > of
> > > > > these
> > > > > > > > > however
> > > > > > > > > > >>>>> > > > > > > > > are
> > > > > > > > > > >>>>> > > > accepted
> > > > > > > > > > >>>>> > > > > by
> > > > > > > > > > >>>>> > > > > > > Sql
> > > > > > > > > > >>>>> > > > > > > > > (i.e., there is no OleDbType for
> > them).
> > > I
> > > > > > could
> > > > > > > > only
> > > > > > > > > > >>>>> > > > > > > > > use
> > > > > > > > > > >>>>> > integer
> > > > > > > > > > >>>>> > > > > type
> > > > > > > > > > >>>>> > > > > > > for
> > > > > > > > > > >>>>> > > > > > > > > UInt32, that's about it. I'm
totally
> > > > unsure
> > > > > > > about
> > > > > > > > > the
> > > > > > > > > > >>>> other
> > > > > > > > > > >>>>> > > types.
> > > > > > > > > > >>>>> > > > > > What
> > > > > > > > > > >>>>> > > > > > > > I've
> > > > > > > > > > >>>>> > > > > > > > > tried doing so far is casting them
> > prior
> > > > to
> > > > > > > > sending
> > > > > > > > > > >>>>> > > > > > > > > them
> > > > > > > > > > >>>> to
> > > > > > > > > > >>>>> > the
> > > > > > > > > > >>>>> > > > > > > > webservice.
> > > > > > > > > > >>>>> > > > > > > > > When inserting them I get errors
> > though.
> > > > > Would
> > > > > > > > > anyone
> > > > > > > > > > >>>>> > know/could
> > > > > > > > > > >>>>> > > > > point
> > > > > > > > > > >>>>> > > > > > > me
> > > > > > > > > > >>>>> > > > > > > > to
> > > > > > > > > > >>>>> > > > > > > > > types that I could use? Any help
> would
> > > be
> > > > > > really
> > > > > > > > > > >>>>> appreciated,
> > > > > > > > > > >>>>> > > i'm
> > > > > > > > > > >>>>> > > > > > lost!
> > > > > > > > > > >>>>> > > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > > Thanks so much!
> > > > > > > > > > >>>>> > > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > > System.UInt32 Length;
> > > > > > > > > > >>>>> > > > > > > > > System.Byte HeaderVersion;
> > > > > > > > > > >>>>> > > > > > > > > BioAPI_BIR_DATA_TYPE Type;
> > > > > > > > > > >>>>> > > > > > > > > System.UInt16 FormatOwner;
> > > > > > > > > > >>>>> > > > > > > > > System.UInt16 FormatID;
> > > > > > > > > > >>>>> > > > > > > > > System.Byte Quality; /*INT8
> > > > BioAPI_QUALITY*/
> > > > > > > > > > >>>>> > > > > > > > > BioAPI_BIR_PURPOSE Purpose;
> > > > > > > > > > >>>>> > > > > > > > > BioAPI_BIR_AUTH_FACTORS
FactorsMask;
> > > > > > > > > > >>>>> > > > > > > > > System.IntPtr BiometricData;
> > > > > > > > > > >>>>> > > > > > > > > System.IntPtr Signature;
> > > > > > > > > > >>>>> > > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > >
> > > > > > > > > > >>>>> > > > > > > > >
> > > > > > > > > > >>>>> > > > > > > >
> > > > > > > > > > >>>>> > > > > > >
> > > > > > > > > > >>>>> > > > > > >
> > > > > > > > > > >>>>> > > > > > >
> > > > > > > > > > >>>>> > > > > >
> > > > > > > > > > >>>>> > > > >
> > > > > > > > > > >>>>> > > > >
> > > > > > > > > > >>>>> > > > >
> > > > > > > > > > >>>>> > > >
> > > > > > > > > > >>>>> > >
> > > > > > > > > > >>>>> > >
> > > > > > > > > > >>>>> > >
> > > > > > > > > > >>>>> >
> > > > > > > > > > >>>>>
> > > > > > > > > > >>>>>
> > > > > > > > > > >>>>>
> > > > > > > > > > >>>>
> > > > > > > > > > >>>
> > > > > > > > > > >>>
> > > > > > > > > > >>
> > > > > > > > > > >>
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > >
> > >
> > >
> >
>
>
>

.

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