我是C＃开发的新手。我正在研究服务器客户端聊天应用程序，我希望在服务器和客户端之间启用图像交换功能。我已经尝试了很多在线教程，但没有一个适应我的代码。以下是我的代码：
namespace ServerClientChat
{
{
公共部分类Form1：表单 { 私有TcpClient客户端; public StreamReader STR; public StreamWriter STW; 公共字符串接收;
public Image img_to_receive;
public String text_to_send;
public Image img_to_send;
public String UserName = "Asad";
public Form1()
{
InitializeComponent();
IPAddress[] localIP = Dns.GetHostAddresses(Dns.GetHostName()); //getting own IP
foreach (IPAddress address in localIP)
{
if (address.AddressFamily == AddressFamily.InterNetwork)
{
textBox3.Text = address.ToString();
}
}
// textBox1.KeyDown += new KeyEventHandler(textBox1_KeyDown);
}
private void button3_Click(object sender, EventArgs e) //Connect to server
{
if (string.IsNullOrWhiteSpace(this.textBox7.Text))
{
MessageBox.Show("Please enter a Username.");
}
else if (string.IsNullOrWhiteSpace(this.textBox5.Text))
{
MessageBox.Show("Please enter an IP address.");
}
else if (string.IsNullOrWhiteSpace(this.textBox6.Text))
{
MessageBox.Show("Please enter a Port number.");
}
else
{
textBox7.Enabled = false;
textBox2.Enabled = false;
textBox5.Enabled = false;
textBox6.Enabled = false;
client = new TcpClient();
//set client side endpoint consisting of client's ip address and port
IPEndPoint IP_End = new IPEndPoint(IPAddress.Parse(textBox5.Text), int.Parse(textBox6.Text));
try
{
client.Connect(IP_End);
if (client.Connected)
{
textBox2.AppendText(">> Connected to Server" + "\n");
STW = new StreamWriter(client.GetStream());
STR = new StreamReader(client.GetStream());
STW.AutoFlush = true;
backgroundWorker1.RunWorkerAsync(); //start receiving data in background (async means non-blocked communication
backgroundWorker2.WorkerSupportsCancellation = true; //ability to cancel this thread
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
}
}
}
private void button2_Click(object sender, EventArgs e) //Start server
{
if (string.IsNullOrWhiteSpace(this.textBox7.Text))
{
MessageBox.Show("Please enter a Username.");
}
else if (string.IsNullOrWhiteSpace(this.textBox4.Text))
{
MessageBox.Show("Please enter a Port number.");
}
else
{
textBox7.Enabled = false;
textBox3.Enabled = false;
textBox4.Enabled = false;
textBox2.Enabled = false;
TcpListener listener = new TcpListener(IPAddress.Any, int.Parse(textBox4.Text)); //Listens for connections from TCP network clients.
listener.Start();
client = listener.AcceptTcpClient();
STR = new StreamReader(client.GetStream()); //Implements a TextReader that reads characters from a byte stream in a particular encoding.
STW = new StreamWriter(client.GetStream());
STW.AutoFlush = true; //Setting AutoFlush to true means that data will be flushed from the buffer to the stream after each write operation, but the encoder state will not be flushed.
backgroundWorker1.RunWorkerAsync(); //start receiving data in background (async means non-blocked communication
backgroundWorker2.WorkerSupportsCancellation = true; //ability to cancel this thread
}
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) //to receive data
{
while(client.Connected)
{
try
{
receive = STR.ReadLine();
this.textBox2.Invoke(new MethodInvoker(delegate () { textBox2.AppendText( receive + "\n\n"); }));
receive = "";
}
catch(Exception x)
{
MessageBox.Show(x.Message.ToString());
}
}
}
private void backgroundWorker2_DoWork(object sender, DoWorkEventArgs e) //to send data
{
if(client.Connected)
{
STW.WriteLine(text_to_send);
this.textBox2.Invoke(new MethodInvoker(delegate () { textBox2.AppendText(text_to_send + "\n\n"); }));
}
else
{
MessageBox.Show("Send Failed");
}
backgroundWorker2.CancelAsync();
}
private void button1_Click(object sender, EventArgs e) //Send button
{
if(textBox1.Text!="")
{
text_to_send = textBox7.Text+":"+textBox1.Text;
backgroundWorker2.RunWorkerAsync();
}
textBox1.Text = "";
}
private void Form1_Load(object sender, EventArgs e)
{
DialogResult f = MessageBox.Show("Welcome to My Chat App! Do you want to start your own Server? ", "Welcome!", MessageBoxButtons.YesNoCancel);
if (f == DialogResult.Yes)
{
button3.Enabled = false;
textBox5.Enabled = false;
textBox6.Enabled = false;
}
if (f == DialogResult.No)
{
button2.Enabled = false;
textBox3.Enabled = false;
textBox4.Enabled = false;
}
if(f==DialogResult.Cancel)
{
this.Close();
}
}
private void label5_Click(object sender, EventArgs e)
{
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
button1_Click(this, new EventArgs());
}
}
private void button4_Click(object sender, EventArgs e)
{
}
private void browsebtn_Click(object sender, EventArgs e)
{
}
private void sendimg_Click(object sender, EventArgs e)
{
try
{
}
catch(Exception c)
{
MessageBox.Show(c.Message);
}
}
}
}