C# C/S多窗体程序 showdialog后阻塞
登陆成功后，new了一个新窗体，并且需要在新窗体中与服务器沟通，现在可以把请求发给服务器，客户端这边执行到showdialog后就阻塞了，不能收到服务器发过来的命令了，客户端这边只有一个线程是用来与服务器沟通，客户端这边是不是需要一个新线程了执行showdialog方法？我的程序里有多个窗体，那是不是每执行一次showdialog方法，就需要创建一个新的线程呢？
contactWithServer = new ContactWithServer(this, user);
Thread clientcontactserverThread = new Thread(new ThreadStart(contactWithServer.ReceiveMsg));
clientcontactserverThread.Start();
public void ReceiveMsg()
{
while (true)
{
lock (this)
{
// 调用接收回调函数
IAsyncResult iar = udpReceiveClient.BeginReceive(new AsyncCallback(ReceiveCallback), udpReceiveState);
receiveDone.WaitOne();
Thread.Sleep(100);
}
}
}
private void ReceiveCallback(IAsyncResult iar)
{
UdpState udpReceiveState = iar.AsyncState as UdpState;
if (iar.IsCompleted)
{
data = udpReceiveState.udpClient.EndReceive(iar, ref udpReceiveState.ipEndPoint);
if (data.Length < 20) //只有命令
commandStr = Encoding.ASCII.GetString(data);
else //既有命令又有数据
{
int i = 0;
///取出命令
for (i = 0; i < leng; i++)
{
if (Convert.ToInt32(data[i]) == 0) //寻找请求中的有效字符的最终位置
break;
}
byte[] cmdbyte = new byte[i];
for (int k = 0; k < i; k++)
{
cmdbyte[k] = data[k];
}
commandStr = Encoding.ASCII.GetString(cmdbyte);
}
MessageBox.Show(commandStr, "来自服务器的命令！");
handleMsg(commandStr);
Thread.Sleep(100);
receiveDone.Set();
}
}
private void handleMsg(string commandStr)
{
switch (commandStr)
{
case "LoginSuccess":
{
登陆.LoginFormDelegate closeDelegate = new 登陆.LoginFormDelegate(loginFormAction);
loginForm.Invoke(closeDelegate, new String[] { "close" });
loginForm.isFirst = false; //客户端已登陆成功，下次发给服务器的消息从另一端口发出
frm = new 申请及扫描(user, this);
[color=#000000]frm.ShowDialog();[/color]
}
break;
case "LoginFail":
{
MessageBox.Show("用户名或者密码错误");
登陆.LoginFormDelegate clearDelegate = new 登陆.LoginFormDelegate(loginFormAction);
loginForm.Invoke(clearDelegate, new String[] { "clear" });
}
break;
case "ReFreshData":
///取出数据
buff = new byte[data.Length - leng];
for (int j = 0; j < data.Length - leng; j++)
buff[j] = data[leng + j];
memStream = new MemoryStream(buff);
memStream.Seek(0, SeekOrigin.Begin);
memStream.Flush();
DataTable dt = new DataTable();
dt = (DataTable)formatter.Deserialize(memStream);
memStream.Close();
MessageBox.Show("收到服务器的命令");
break;
}
}
