Re: Using an ActiveX ocx control on a Webform
jeff_at_bennet-tec.com
Date: 12/22/04
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Date: 22 Dec 2004 15:22:24 -0800
Did you ever meet your needs as described below?
I would be very anxious to do the same thing.
Do you have any sample project you can share ?
* * Please include a copy of this message with your reply
Jeff Bennett
Jeff@Bennet-Tec.Com
=================== ===================
Mehr H wrote:
> I have been working on this for several days and am still have had no
> success in achieving this. Pleae help. It seems that documentation
for this
> is very limited. I have looked in several books and they all seem to
say
> either nothing about this or that this is "out of the scope of this
book",
> even "Professional ASP.NET".
>
> I have a ActiveX component that I'd like to expose through a .NET
wrapper so
> in the case that a client browses to my aspx page and does not choose
to
> download the ActiveX I can Automate the ActiveX object through the
.NET
> Wrapper on the Server and then stream the result of the ActiveX
object
> output to the client as a JPG.
>
> Here is all I've done so far:
>
> I've used the AxImp utility to create a new dll, called
AxMyActiveX.dll.
> I've also asked for it to give me the source code for this type
library and
> it has and it is called Interop.AxMyActiveX.cs.
> I have added this line of code
> [System.ComponentModel.ToolboxItemAttribute(true)]
> in order to be able to view the "UI" of this ActiveX control to my
.cs file
> and then used the command line csc to recompile and build the new
> Interop.AxMyActiveX.dll.
>
> I create a new ASP.NET webApplication. I have one ASPX page. I
browse to my
> Interop.AxMyActiveX.dll and set my reference to this dll.
> Since .NET is free threated by default and I am attempting to use a
COM
> component I have set the following attribute
> AspCompat="TRUE" (which forces the page to execute in STA mode) in my
ASPX
> file ( the file into which I am attempting to add my
Interop.AxMyActiveX
> object).
>
> I switch into Design mode and go to my toolbox and select Add/Remove
Items.
> I browse to my Interop.AxMyActiveX.dll. The item "AxMyActiveX"
appears in
> the toolbox but it is GRAYED OUT!
>
> If I try to create the control programmatically from within my page
load
> event such as below
>
> private void Page_Load(object sender, System.EventArgs e)
> {
>
> AxMyActiveXControl AxMyActiveX= new AxMyActiveXControl.AxMyActiveX();
>
> AxMyActiveX.SetSomeProperty = true;
>
> }
>
> and then set an exposed property which takes a bool value I get an
exception
> thrown such as :
>
> Server Error in '/AFRWS' Application.
>
----------------------------------------------------------------------------
> ----
>
> Exception of type InvalidActiveXStateException was thrown.
> Description: An unhandled exception occurred during the execution of
the
> current web request. Please review the stack trace for more
information
> about the error and where it originated in the code.
>
> Exception Details:
System.Windows.Forms.AxHost+InvalidActiveXStateException:
> Exception of type InvalidActiveXStateException was thrown.
>
> Source Error:
>
> Line 62:
> Line 63:
> Line 64: AxMyActiveX.SetSomeProperty = true;
> Line 65:
> Line 66:
>
> Source File: c:\pathtomyfile.aspx Line: 64
>
> Stack Trace:
>
> [InvalidActiveXStateException: Exception of type
> InvalidActiveXStateException was thrown.]
> AxMyActiveXControl.AxMyActiveX.set_SetSomeProperty (Boolean value)
> PathtoMyFile.Page_Load(Object sender, EventArgs e) in
> c:\Pathtomyfile\MyPage.aspx.cs:64
> System.EventHandler.Invoke(Object sender, EventArgs e) +0
> System.Web.UI.Control.OnLoad(EventArgs e)
> System.Web.UI.Control.LoadRecursive()
> System.Web.UI.Page.ProcessRequestMain()
>
>
>
> I have no idea what I'm doing improperly but I can't get this to
work. I
> tried using the item in the design mode of a regular .NET Windows
Control
> Library and I was able to add the item into the toolbox and it was
available
> (not grayed out). I was able to drag it onto the design window and
compile
> it as a usercontrol. Then I created a windows application and I was
able to
> drag this new usercontrol onto the form and everything ran and worked
just
> fine. Please help!
> Thanks so much,
> Mehrh
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