FileStream Beginread

[Lou]

I can't get it to work. Please help...
-louie

hPipe = CreateFile(conn ectionString,

GENERIC_WRITE | GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRIT E, 0,

OPEN_EXISTING, FILE_ATTRIBUTE_ NORMAL,HANDLE.Z ero);

if ((hPipe.ToInt32 ()) == INVALID_HANDLE_ VALUE)

{

blnConnected=fa lse;

return false;

}

//start an asyncronys read

IAsyncResult iAR;

byte[] byRequest=new byte[4095];

iAR=myStream.Be ginRead(byReque st,0,4096,ASync FileCallBackRea d(iAR),myStream )
;

public void ASyncFileCallBa ckRead(IAsyncRe sult iAR)

{

System.Text.ASC IIEncoding EnAscii;

System.Text.ASC IIEncoding EnUNI;

int byteCount;

string recData;

byte recReq[]=new byte[(Convert.ToByte (iAR.AsyncState )];

byteCount=myStr eam.EndRead(iAR );
recData = EnAscii.GetStri ng(recReq,0,byt eCount);

[Jon Skeet [C# MVP]]

Lou <lo********@com cast.net> wrote:

I still get errors??

C:\Documents and Settings\LGarvi n.PINNACLE\My Documents\Visua l Studio
Projects\Window sApplication13\ DekoAutomation. cs(154): The best overloaded
method match for 'System.IO.Stre am.BeginRead(by te[], int, int,
System.AsyncCal lback, object)' has some invalid arguments
C:\Documents and Settings\LGarvi n.PINNACLE\My Documents\Visua l Studio
Projects\Window sApplication13\ DekoAutomation. cs(155): Argument '4': cannot
convert from 'WindowsApplica tion13.AsyncCal lback' to 'System.AsyncCa llback'

Have you declared your own delegate called AsyncCallback? You shouldn't
have done.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Lou]

John I'm making progress. I can now get the call back from the pipe, but how
do I read the data from the pipe??
Thanks again for all your help/patience.
-Lou

public void ASyncFileCallBa ckRead(IAsyncRe sult iAR)

{

//byte[] recResponse=iAR .AsyncState;

int byteCount;

int[] recData;

byteCount=myStr eam.EndRead(iAR );

recData=iAR.Asy ncState;

}

"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** *@msnews.micros oft.com...

Lou <lo********@com cast.net> wrote:

I still get errors??

C:\Documents and Settings\LGarvi n.PINNACLE\My Documents\Visua l Studio
Projects\Window sApplication13\ DekoAutomation. cs(154): The best overloaded method match for 'System.IO.Stre am.BeginRead(by te[], int, int,
System.AsyncCal lback, object)' has some invalid arguments
C:\Documents and Settings\LGarvi n.PINNACLE\My Documents\Visua l Studio
Projects\Window sApplication13\ DekoAutomation. cs(155): Argument '4': cannot convert from 'WindowsApplica tion13.AsyncCal lback' to

'System.AsyncCa llback'
Have you declared your own delegate called AsyncCallback? You shouldn't
have done.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Jon Skeet [C# MVP]]

Lou <lo********@com cast.net> wrote:

John I'm making progress. I can now get the call back from the pipe, but how
do I read the data from the pipe??

Uncomment the line you commented out, but include a cast:

byte[] recResponse = iAR.AsyncState;

then use

int byteCount = myStream.EndRea d(iAR);

and then bytes 0 to byteCount-1 are the data that's been read.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Lou]

the compiler doesn't like'

int byteCount = myStream.EndRea d(iAR);

C:\Documents and Settings\LGarvi n.PINNACLE\My Documents\Visua l Studio
Projects\Window sApplication13\ DekoAutomation. cs(229): Cannot implicitly
convert type 'object' to 'byte[]'

"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** *@msnews.micros oft.com...

Lou <lo********@com cast.net> wrote:

John I'm making progress. I can now get the call back from the pipe, but how do I read the data from the pipe??

Uncomment the line you commented out, but include a cast:

byte[] recResponse = iAR.AsyncState;

then use

int byteCount = myStream.EndRea d(iAR);

and then bytes 0 to byteCount-1 are the data that's been read.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Lou]

I DID IT!!

byte[] recResponse=(by te[])iAR.AsyncState ;

int byteCount = myStream.EndRea d(iAR);

thanks for your support, your a patient person and its appreciated.


"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** *@msnews.micros oft.com...

Lou <lo********@com cast.net> wrote:

John I'm making progress. I can now get the call back from the pipe, but how do I read the data from the pipe??

Uncomment the line you commented out, but include a cast:

byte[] recResponse = iAR.AsyncState;

then use

int byteCount = myStream.EndRea d(iAR);

and then bytes 0 to byteCount-1 are the data that's been read.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Jon Skeet [C# MVP]]

Lou <lo********@com cast.net> wrote:

the compiler doesn't like'

int byteCount = myStream.EndRea d(iAR);

C:\Documents and Settings\LGarvi n.PINNACLE\My Documents\Visua l Studio
Projects\Window sApplication13\ DekoAutomation. cs(229): Cannot implicitly
convert type 'object' to 'byte[]'

I don't think that's the line it's complaining about. I think it's
complaining because you've done:

byte[] byRequest = iAR.AsyncState;

where you should have

byte[] byRequest = (byte[]) iAR.AsyncState;

(My fault for not putting it before.)

I think you could do with learning a bit more about the basics of C#
before going too much further with asynchronous stuff though - it would
help you solve a lot of your problems yourself.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too