/// <summary>
/// 发送数据
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public bool SendData(byte[] data)
{
if (UDPClient_Connect_listBox.SelectedItems.Count > 0)
{
for (int i = 0; i < UDPClient_Connect_listBox.SelectedItems.Count; i++)
{
try
{
ZXBC_UDPClient client = (ZXBC_UDPClient)UDPClient_Connect_listBox.SelectedItems[i];
client.NetWork.Send(data, data.Length);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
return(false);
}
}
return(true);
}
else
{
MessageBox.Show("无可用客户端", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
return(false);
}
}
private void UDPClient_add_button_Click(object sender, EventArgs e)
{
try
{
ZXBC_UDPClient client = new ZXBC_UDPClient();
client.NetWork = new UdpClient();
client.NetWork.Connect(UDPClient_IP_textBox.Text.Trim(), (int)UDPClient_port_numericUpDown.Value);
client.ipLocalEndPoint = (IPEndPoint)client.NetWork.Client.LocalEndPoint;
client.Name = client.ipLocalEndPoint.Port + "->" + client.NetWork.Client.RemoteEndPoint.ToString();
client.NetWork.BeginReceive(new AsyncCallback(ReceiveCallback), client);//继续异步接收数据
lstClient.Add(client);
BindLstClient();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
/// <summary>
/// 接收到数据
/// </summary>
/// <param name="ar"></param>
public void ReceiveCallback(IAsyncResult ar)
{
ZXBC_UDPClient uclient = (ZXBC_UDPClient)ar.AsyncState;
try
{
if (uclient.NetWork.Client != null && uclient.NetWork.Client.Connected)
{
IPEndPoint fclient = uclient.ipLocalEndPoint;
Byte[] recdata = uclient.NetWork.EndReceive(ar, ref fclient);
string ConnName = uclient.ipLocalEndPoint.Port + "->" + fclient.ToString();
if (DataReceived != null)
{
DataReceived.BeginInvoke(ConnName, recdata, null, null); //异步输出数据
}
uclient.NetWork.BeginReceive(new AsyncCallback(ReceiveCallback), uclient); //继续异步接收数据
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
/// <summary>
/// 接收到数据
/// </summary>
/// <param name="ar"></param>
public void ReceiveCallback(IAsyncResult ar)
{
ZXBC_UDPClient userver = (ZXBC_UDPClient)ar.AsyncState;
string ConnName = "";
try
{
if (userver.NetWork.Client != null)
{
IPEndPoint fclient = userver.ipLocalEndPoint;
Byte[] recdata = userver.NetWork.EndReceive(ar, ref fclient);
ConnName = userver.ipLocalEndPoint.Port + "->" + fclient.ToString();
if (DataReceived != null)
{
DataReceived.BeginInvoke(ConnName, recdata, null, null);//异步输出数据
}
if (lstClient.Contains(ConnName) == false)
{//新的客户端
lstClient.Add(ConnName);
BindLstClient();
}
}
}
catch (ObjectDisposedException ex) { }
catch (Exception ex)
{
MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
if (userver.NetWork.Client != null)
{
userver.NetWork.BeginReceive(new AsyncCallback(ReceiveCallback), userver);//继续异步接收数据
}
}
}