File Transfer

[lkr]

hi
i got one file transfer program using serialization which has a limitation
that i can send only 8192 bytes(8KB). i want to send more than that wht can i
do. how can i divide the file into mutiple segment and send the file and
receive it. here is the program below

public static void SendFileInfo()
{
// Get file type or extension
fileDet.FILETYP E = fs.Name.Substri ng((int)fs.Name .Length - 3, 3);

// Get file length (Future purpose)
fileDet.FILESIZ E = fs.Length;

XmlSerializer fileSerializer = new XmlSerializer(t ypeof(FileDetai ls));
MemoryStream stream = new MemoryStream();

// Serialize object
fileSerializer. Serialize(strea m, fileDet);
// Stream to byte
stream.Position = 0;
byte[] bytes = new byte[stream.Length];
stream.Read(byt es, 0, Convert.ToInt32 (stream.Length) );

Console.WriteLi ne("Sending file details...");

// Send file details
sender.Send(byt es, bytes.Length, endPoint);
stream.Close();
}
and in the receiving end

public static void ReceiveFile()
{
try
{
Console.WriteLi ne(
"-----------*******Waiting to get File!!*******-----------");
// Receive file

receiveBytes = receivingUdpCli ent.Receive(ref RemoteIpEndPoin t);

// Convert and display data
Console.WriteLi ne("----File received...Savi ng...");

// Create temp file from received file extension
fs = new FileStream("tem p." + fileDet.FILETYP E, FileMode.Create ,
FileAccess.Read Write, FileShare.ReadW rite);
fs.Write(receiv eBytes, 0, receiveBytes.Le ngth);

Console.WriteLi ne("----File Saved...");
Console.WriteLi ne("-------Opening file with associated program------");

Process.Start(f s.Name); // Opens file with associated program
}
catch (Exception e)
{
Console.WriteLi ne(e.ToString ());
}
finally
{
//fs.Close();
receivingUdpCli ent.Close();
}
}
plz give solution for this

thanks for advance
lkr

[Ignacio Machin \( .NET/ C# MVP \)]

Re: File Transfer

Hi,


Basically what you want is a Send file / Receive file set of methods right?

IF so find below the code for those, I also include two help methods (
Read/WriteStringToNe twork ) that they use.

Also notice the small buffers cause these are meant to run on a PocketPC

Cheers,


--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation


//*************** *************** *************** *************** ************

public void SendFile( string filename )
{
try
{
int readed=0;
byte[] buff = new Byte[2048];
FileStream fstream = new FileStream( filename, FileMode.Open);
//send the file length
WriteStringToNe twork( fstream.Length. ToString() );
//writer.WriteLin e( fstream.Length) ;
//writer.Flush();
while( (readed=fstream .Read( buff, 0, 2048))>0 )
networkstream.W rite( buff, 0, readed);
fstream.Close() ;
}
catch(Exception e)
{
throw new Exception("\n== >Method: NetAccess.SendF ile, sending this file
:"+ filename +" :" + e.Message );
}
}
public void ReceiveFile( string filename)
{
try
{
int size= Convert.ToInt32 (ReadStringFrom Network());
FileStream fs = new FileStream( filename, FileMode.Create );
byte[] buff = new Byte[ size>40048?4004 8:size];
int readed=0;
int readedt=0;
int toread= size>40048?4004 8:size;
while( (readedt=networ kstream.Read( buff, 0, toread))>0)
{
readed+= readedt;
fs.Write( buff, 0, readedt);
toread=(size-readed)>40048?4 0048:size-readed;
if ( toread == 0 ) break;
}
fs.Close();

}
catch(Exception e)
{
throw new Exception("\n== >Method: NetAccess.Recei veFile, receiving this
file :"+ filename +" :" + e.Message );
}
}






public void WriteStringToNe twork(string towrite)
{
try
{
//char[] chars = towrite.ToCharA rray();
foreach( char c in towrite.ToCharA rray())
networkstream.W riteByte( Convert.ToByte( c));
networkstream.W riteByte( 13);
networkstream.W riteByte( 10);
//Now we have to convert the chars to byte
//writer.WriteLin e( towrite);
//writer.Flush();
}
catch(Exception e)
{
throw new Exception("\n== >Method: NetAccess.Write StringToNetwork ,
writing this string " + towrite+ " :" + e.Message );

}
}
public string ReadStringFromN etwork( )
{
StringBuilder buff;
try
{
buff = new StringBuilder( 20);
int ch;
while( (ch=networkstre am.ReadByte())! = -1)
{
if (ch == 13) continue;
if ( ch==10) return buff.ToString() ;
buff.Append( Convert.ToChar( ch));

}
}
catch(Exception e)
{
throw new Exception("\n== >Method: NetAccess.ReadS tringFromNetwor k,
reading string :" + e.Message );

}
return buff.ToString() ;
}


//*************** *************** *************** *************** *************


"lkr" <lkr@discussion s.microsoft.com > wrote in message
news:BB1C124E-DC5A-472A-874B-826EA00C45E5@mi crosoft.com...[color=blue]
> hi
> i got one file transfer program using serialization which has a limitation
> that i can send only 8192 bytes(8KB). i want to send more than that wht
> can i
> do. how can i divide the file into mutiple segment and send the file and
> receive it. here is the program below
>
> public static void SendFileInfo()
> {
> // Get file type or extension
> fileDet.FILETYP E = fs.Name.Substri ng((int)fs.Name .Length - 3, 3);
>
> // Get file length (Future purpose)
> fileDet.FILESIZ E = fs.Length;
>
> XmlSerializer fileSerializer = new XmlSerializer(t ypeof(FileDetai ls));
> MemoryStream stream = new MemoryStream();
>
> // Serialize object
> fileSerializer. Serialize(strea m, fileDet);
> // Stream to byte
> stream.Position = 0;
> byte[] bytes = new byte[stream.Length];
> stream.Read(byt es, 0, Convert.ToInt32 (stream.Length) );
>
> Console.WriteLi ne("Sending file details...");
>
> // Send file details
> sender.Send(byt es, bytes.Length, endPoint);
> stream.Close();
> }
> and in the receiving end
>
> public static void ReceiveFile()
> {
> try
> {
> Console.WriteLi ne(
> "-----------*******Waiting to get File!!*******-----------");
> // Receive file
>
> receiveBytes = receivingUdpCli ent.Receive(ref RemoteIpEndPoin t);
>
> // Convert and display data
> Console.WriteLi ne("----File received...Savi ng...");
>
> // Create temp file from received file extension
> fs = new FileStream("tem p." + fileDet.FILETYP E, FileMode.Create ,
> FileAccess.Read Write, FileShare.ReadW rite);
> fs.Write(receiv eBytes, 0, receiveBytes.Le ngth);
>
> Console.WriteLi ne("----File Saved...");
> Console.WriteLi ne("-------Opening file with associated program------");
>
> Process.Start(f s.Name); // Opens file with associated program
> }
> catch (Exception e)
> {
> Console.WriteLi ne(e.ToString ());
> }
> finally
> {
> //fs.Close();
> receivingUdpCli ent.Close();
> }
> }
> plz give solution for this
>
> thanks for advance
> lkr[/color]