錯誤上「定時器」是「System.Windows.Forms.Timer」和「System.Threading.Timer」之間的不明確的引用

Question

我已經表明錯誤：

 
'Timer' is an ambiguous reference between 'System.Windows.Forms.Timer' and 'System.Threading.Timer' 

當我添加的代碼爲時鐘

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

的問題是，你是

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

這兩個命名空間都有一個Timer類和編譯器無法確定要使用哪一個。當你宣佈你Timer，使用全名，或者：

System.Windows.Forms.Timer 

或

System.Threading.Timer 

WinForms Timer Class

Threading Timer Class

根據您的類的用法，我想你想System.Windows.Forms.Timer，像這樣：

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

Answer 2

有多種選擇這裏：

• 使用別名：

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

• 使用完全合格的名稱：

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

• 使用空間別名：

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

但是，我個人建議將網絡代碼中的用戶界面代碼分開 - 在這一點上這不太可能是個問題。

我還要指出的是您目前從流中讀取不考慮返回值考慮在內 - 這是一個糟糕的主意，因爲你不知道多少的緩衝區實際上包含了新數據。