File size is larger after beginwrite

[Chi]

I am a newibe of C# and async programming
thx for your help. I think most likely is my logical problem but i cant
figure it out

using System.IO;
using System.Text;
using System;


class Class1
{
static void Main()
{
Class1 a = new Class1();
a.Run();
Console.ReadLin e();

}

void cB(IAsyncResult ar)
{

fsOut.EndWrite( ar);
fsIn.BeginRead( buffer,0,buffer .Length,new AsyncCallback(w rite),null);


}
void write(IAsyncRes ult ar)
{
int byteRead=fsIn.E ndRead(ar);
if(byteRead==0)
{
fsOut.Write(buf fer,0,buffer.Le ngth);
fsOut.Close();
fsIn.Close();
}
else
{
fsOut.BeginWrit e(buffer,0,buff er.Length,new AsyncCallback(c B),null);
}

}

public void Run()
{
fsOut = new
FileStream("Res ult.jpg",FileMo de.Create,FileA ccess.Write,Fil eShare.ReadWrit e,2048,true);
fsIn= new
FileStream("tes t.jpg",FileMode .Open,FileAcces s.Read,FileShar e.ReadWrite,204 8,true);
fsIn.BeginRead( buffer,0,buffer .Length,new AsyncCallback(w rite),null);


}
Class1()
{

buffer=new byte[2048];
}
//int LastResult;
private FileStream fsIn;
private FileStream fsOut;
byte [] buffer;




}

[Jon Skeet [C# MVP]]

Re: File size is larger after beginwrite

Chi wrote:[color=blue]
> I am a newibe of C# and async programming
> thx for your help. I think most likely is my logical problem but i cant
> figure it out[/color]

Well, it always helps if you describe what the problem is as well as
providing code. However, you certainly *do* have a problem, in that
your call to BeginWrite is assuming that it's managed to read a whole
buffer, instead of writing out bytesRead amount of data.

You're also writing out a full buffer's worth of data even if you
haven't read anything (where you shouldn't be writing anything).

Jon