‘Timer’错误是’System.Windows.Forms.Timer’和’System.Threading.Timer’之间的模糊引用

我显示错误：

 'Timer'是'System.Windows.Forms.Timer'和'System.Threading.Timer'之间的模糊引用 

当我添加时钟代码

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Net.Sockets; using System.Threading; using System.Security.Cryptography; namespace SocketClient { public partial class SocketClient : Form { System.Net.Sockets.TcpClient clientSocket = new System.Net.Sockets.TcpClient(); NetworkStream serverStream = default(NetworkStream); string readData = null; public SocketClient() { InitializeComponent(); Timer timer = new Timer(); timer.Tick += new EventHandler(TimerOnTick); timer.Interval = 1000; timer.Start(); } private void TimerOnTick(object sender, EventArgs ea) { Invalidate(); } protected override void OnPaint(PaintEventArgs pea) { StringFormat strfmt = new StringFormat(); strfmt.Alignment = StringAlignment.Far; strfmt.LineAlignment = StringAlignment.Far; pea.Graphics.DrawString(DateTime.Now.ToString("F"), Font, new SolidBrush(ForeColor), ClientRectangle, strfmt); } private void getMessage() { while (true) { serverStream = clientSocket.GetStream(); int buffSize = 0; byte[] inStream = new byte[10025]; buffSize = clientSocket.ReceiveBufferSize; serverStream.Read(inStream, 0, buffSize); string returndata = System.Text.Encoding.ASCII.GetString(inStream); readData = "" + returndata; msg(); } } private void msg() { if (this.InvokeRequired) this.Invoke(new MethodInvoker(msg)); else textDisplay.Text = textDisplay.Text + Environment.NewLine + " >> " + readData; } private void buttonConnect_Click(object sender, EventArgs e) { // show the message if no input is enter. if (string.IsNullOrEmpty(textName.Text) || string.IsNullOrEmpty(textPort.Text) || string.IsNullOrEmpty(textIP.Text)) { MessageBox.Show("Please enter Name, IP Address & Port #"); } else { //connect to the server if all 3 input is enter readData = "Conected to NYP Server ..."; msg(); clientSocket.Connect(textIP.Text, Convert.ToInt32(textPort.Text)); serverStream = clientSocket.GetStream(); byte[] outStream = System.Text.Encoding.ASCII.GetBytes(textName.Text + "$"); serverStream.Write(outStream, 0, outStream.Length); serverStream.Flush(); Thread ctThread = new Thread(getMessage); ctThread.Start(); } } private void buttonSend_Click(object sender, EventArgs e) { // Show msg box if no server is connected if (serverStream == null) { MessageBox.Show("Please connect to a server first!"); return; } // Send text byte[] outStream = System.Text.Encoding.ASCII.GetBytes(textSend.Text + "$"); serverStream.Write(outStream, 0, outStream.Length); serverStream.Flush(); // Clear text textSend.Text = ""; } private void textDisplay_TextChanged(object sender, EventArgs e) { textDisplay.SelectionStart = textDisplay.Text.Length; textDisplay.ScrollToCaret(); textDisplay.Refresh(); } private void textSend_TextChanged(object sender, EventArgs e) { buttonSend.Enabled = !string.IsNullOrEmpty(textSend.Text); } } } 

Answer 1

这里有各种选择：

• 使用别名：

   using UITimer = System.Windows.Forms.Timer; ... UITimer timer = new UITimer(); 

• 使用完全限定名称：

   System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer(); 

• 使用命名空间别名：

   using WinForms = System.Windows.Forms; ... WinForms::Timer timer = new WinForms::Timer(); 

但是，我个人建议从网络代码中拆分用户界面代码 – 此时它不太可能成为问题。

我还会注意到，您目前正在从流中读取而不考虑返回值 – 这是一个坏主意，因为您不知道有多少缓冲区实际包含新数据。

Answer 2

问题是你是

 using System.Windows.Forms; using System.Threading; 

这两个命名空间都有一个Timer类，编译器无法分辨哪个命名空间。 声明Timer ，请使用全名：

 System.Windows.Forms.Timer 

要么

 System.Threading.Timer 

WinForms计时器类

线程计时器类

根据您对该类的使用情况，我认为您需要System.Windows.Forms.Timer ，如下所示：

  public SocketClient() { InitializeComponent(); var timer = new System.Windows.Forms.Timer(); timer.Tick += new EventHandler(TimerOnTick); timer.Interval = 1000; timer.Start(); }