Re: RtlMoveMemory to read an integer from a file

From: Dmitriy Lapshin [C# / .NET MVP] (x-code_at_no-spam-please.hotpop.com)
Date: 03/10/04 

Date: Wed, 10 Mar 2004 12:14:29 +0200

You can also use a BinaryReader's ReadInt32 or ReadInt16 method if you need
to read an int. There are also ReadDouble and ReadDecimal methods. 

-- 
Dmitriy Lapshin [C# / .NET MVP]
X-Unity Test Studio
http://www.x-unity.net/teststudio.aspx
Bring the power of unit testing to VS .NET IDE
"Bill Mittenzwey gateway edi.com>" <bmittenzwey<ATremove space> wrote in
message news:OjdbWdiBEHA.3360@TK2MSFTNGP11.phx.gbl...
> I am trying to read a string of bytes out of a file and convert them into
an
> int. I can make it work in Visual Fox (see below), but I can't seem to get
> the same code to work in c# (see below the fox sample).
>
> Does anyone recognize this or can anyone let me know what I am doing
wrong?
> Is there a better way than the WinAPI?
>
> in fox I can do this:
>
> declare VOID RtlMoveMemory in win32api Double @Dest, Char @Src, Size_T
> BytesToCopy
>
> c = CHR(0) + CHR(0) + CHR(0) + CHR(0) + CHR(0) + CHR(0x80) + CHR(0x50)+
> CHR(0x40)
>
> VariableDecimals= 0
> *This will round to 0 decimals.
> set decimals to (VariableDecimals)
> VariableValue  = 10^(-VariableDecimals)
> VariableLength = 8
> =RtlMoveMemory(@VariableValue, @c,  VariableLength  )
>
> The value of VariableValue will be 66
>
>
> In c#:
> At the top of the class:
> [DllImport("kernel32.dll")]
>
> public static extern void RtlMoveMemory(ref double dest, ref string src,
> long bytesToCopy);
>
> public static decimal convertNumber(string strValue, int varDec)
>
> {
>
> double varValue = Math.Pow(10,-1*varDec);
>
> int varLen = 8;
>
>
> RtlMoveMemory(ref varValue, ref strValue, varLen);
>
> decimal outVal = Convert.ToDecimal(Math.Round(varValue,varDec));
>
> return outVal;
>
> }
>
>
>
>
>
>

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