ThreadStateException 類別

定義

public ref class ThreadStateException : SystemException

[System.Serializable]
public class ThreadStateException : SystemException

[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public class ThreadStateException : SystemException

public class ThreadStateException : SystemException

[<System.Serializable>]
type ThreadStateException = class
    inherit SystemException

[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type ThreadStateException = class
    inherit SystemException

type ThreadStateException = class
    inherit SystemException

Public Class ThreadStateException
Inherits SystemException

繼承

Object

Exception

SystemException

ThreadStateException

屬性

SerializableAttribute ComVisibleAttribute

範例

以下範例展示了一個錯誤，導致系統拋出一個 ThreadStateException。

using System;
using System.Threading;

public class ThreadWork
{
   public static void DoWork()
   {
      Console.WriteLine("Working thread...");
   }
}

class ThreadStateTest
{
   public static void Main()
   {
      ThreadStart myThreadDelegate = new ThreadStart(ThreadWork.DoWork);
      Thread myThread = new Thread(myThreadDelegate);
      myThread.Start();
      Thread.Sleep(0);
      Console.WriteLine("In main. Attempting to restart myThread.");
      try
      {
         myThread.Start();
      }
      catch (ThreadStateException e)
      {
         Console.WriteLine("Caught: {0}", e.Message);
      }
   }
}

Imports System.Threading

Public Class ThreadWork
   
   Public Shared Sub DoWork()
      Console.WriteLine("Working thread...")
   End Sub
End Class

Class ThreadStateTest
   
   Public Shared Sub Main()
      Dim myThreadDelegate As New ThreadStart(AddressOf ThreadWork.DoWork)
      Dim myThread As New Thread(myThreadDelegate)
      myThread.Start()
      Thread.Sleep(0)
      Console.WriteLine("In main. Attempting to restart myThread.")
      Try
         myThread.Start()
      Catch e As ThreadStateException
         Console.WriteLine("Caught: {0}", e.Message)
      End Try
   End Sub
End Class

此程式碼會產生下列輸出：

In main. Attempting to restart myThread.
    Working thread...
    Caught: Thread is running or terminated. Cannot restart.

備註

一旦線程建立，它至少處於其中一個 ThreadState 狀態，直到終止。 ThreadStateException 由於執行緒目前狀態，無法執行請求操作的方法會拋出。 例如，嘗試透過呼叫 Start 已終止的執行緒來重新啟動一個中止的執行緒，會拋出一個 ThreadStateException。

ThreadStateException 使用 HRESULT COR_E_THREADSTATE，其值為 0x80131520。

如需查看 ThreadStateException 實例的初始屬性值列表，請參閱 ThreadStateException 的建構子。

另請參閱

• Thread
• ThreadState
• Exception
• 在 .NET 中處理和擲回例外狀況