Hi all I have a client program about send and recieve file on LAN Network between 2 PC, but it get an error below: "Cross-thread operation not valid: Control 'Client' accessed from a thread other than the thread it was created on" in function SaveFile in line "if (saveFileDialog1.ShowDialog(this) == DialogResult.OK" So I need a help to fix it, Please help me, Thank very much.
It is source code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Net.Sockets;
using System.Net;
using System.Text;
using System.Windows.Forms;
using System.Threading;
#pragma warning disable
namespace GuiClient
{
public partial class Client : Form
{
public delegate void UpdateListBoxCallBack(string s);
public delegate void UpdateLabelCallBack(string s);
private Stream stmReader = null;
private NetworkStream nwkStream = null;
private Stream stmWriter = null;
private TcpClient tcpClient = null;
SaveFileDialog saveFileDialog = new SaveFileDialog();
public Client()
{
InitializeComponent();
}
private void Save(object sender, EventArgs e)
{
Thread t = new Thread(new ThreadStart(SaveFile));
t.Start();
}
public void SaveFile()
{
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
if (saveFileDialog1.ShowDialog(this) == DialogResult.OK)
{
txtFileName.Text = saveFileDialog1.FileName;
set(null);
}
try
{
nwkStream = tcpClient.GetStream();
stmReader = nwkStream;
stmWriter = File.OpenWrite(txtFileName.Text);
byte[] buff = new byte[1024];//1073741824
int len = 0;
set("Receiving");
while ((len = stmReader.Read(buff, 0, 1024)) > 0)
{
stmWriter.Write(buff, 0, len);
stmWriter.Flush();
}
set("File has received succesfully!");
}
catch (Exception ex) {
MessageBox.Show(ex.ToString());
}
finally
{
nwkStream.Close();
stmWriter.Close();
stmReader.Close();
}
}
public void Start(object sender, EventArgs e)
{
txtFileName.Clear();
IPEndPoint ipe = new IPEndPoint(IPAddress.Parse(ipserver.Text), int.Parse(port.Text));
tcpClient = new TcpClient();
tcpClient.Connect(ipe);
StreamReader sr = new StreamReader(tcpClient.GetStream());
StreamWriter sw = new StreamWriter(tcpClient.GetStream());
string duongdan = sr.ReadLine() ;
textBox1.Text = "Server send file : " + duongdan;
saveFileDialog1.FileName = duongdan;
saveFileDialog1.Title = "Save file from Server";
saveFileDialog1.Filter = "Text Files (*.txt)|*.txt|Word Documents" + "(*.doc)|*.doc|All Files (*.*)|*.*";
saveFileDialog1.ShowHelp = true;
}
void set(string s)
{
if (InvokeRequired)
{
object[] pList = { s };
lblMessage.BeginInvoke(new UpdateListBoxCallBack(OnUpdateLabel), pList);
}
else
{
OnUpdateLabel(s);
}
}
private void OnUpdateLabel(String s)
{
lblMessage.Text = s;
}
private void clearip(object sender, EventArgs e)
{
ipserver.Clear();
}
private void clearport(object sender, EventArgs e)
{
port.Clear();
}
private void clearfilename(object sender, EventArgs e)
{
txtFileName.Clear();
}
private void exit(object sender, EventArgs e)
{
Close();
}
private void disconectToolStripMenuItem_Click(object sender, EventArgs e)
{
nwkStream.Close();
stmWriter.Close();
stmReader.Close();
}
private void Client_Load(object sender, EventArgs e)
{
}
}
}
It is my project:
http://www.mediafire.com/?xprt10z40wrjvw7
