Writing FileStream to Disc [Resolved]

[Justy]

Hello,

This is probably a simple enough question.

I want to transfer a file from a server computer to a client using remoting. Which type should I use for the file in the remotable class? I'm comfortable with remoting, however I'm not entirely familiar with FileStreams etc.

Should I even use a FileStream, or should I pass the file as a string? How do I write a FileStream to disc?

Thanks in advance for your help, I haven't had much luck trying to work this out myself.

Justin.

[Justy]

Well then can anyone give me some advice on this code?

Public Function Download() As FileStream        
        Return New FileStream("C:\Test.bmp", FileMode.Open, FileAccess.Read)
End Function
 
Public Sub Run
        Dim fileContent As Byte()
        Dim MyStream As FileStream = Download()
 
        MyStream.Read(fileContent, 0, Integer.MaxValue)
        MyStream.Close()
 
        MyStream = New FileStream("C:\TEST2.BMP", FileMode.Create, FileAccess.Write)
        MyStream.Write(fileContent, 0, fileContent.Length)
        MyStream.Close()
End Sub

The Download() function will normally be a remotable class, but I've simplified things above. When the Run() method is called, I get the following error

System.ArgumentNullException
Additional information: Buffer cannot be null

Or if anyone has any examples of transferring files using remoting then please let me know. Thanks...

Justin.

[Justy]

Where have all the experts gone?

[Edneeis]

Originally posted by Justy
Where have all the experts gone?

I think they have the day off.

Also it would be helpful to know which line of code gives that error and try flushing before you close.

[nemaroller]

Well the reason for the error is because you have not explicitly set the Byte array size. You must get the length of the stream and set the byte array length to it when you declare the array, before reading the stream into it.

Dim MyStream As FileStream = Download()
 
Dim fileContent(MyStream.Length) As Byte
 
  MyStream.Read(fileContent, 0, Integer.MaxValue)

[Justy]

Thankyou nemaroller.