TraceSwitch.TraceError 属性

定义

命名空间:

System.Diagnostics

程序集:

System.Diagnostics.TraceSource.dll

程序集:

System.dll

程序集:

netstandard.dll

获取一个值，它指示开关是否允许错误处理消息。

public:
 property bool TraceError { bool get(); };

public bool TraceError { get; }

member this.TraceError : bool

Public ReadOnly Property TraceError As Boolean

属性值

Boolean

如果 Level 设置为 Error、Warning、Info 或 Verbose，则为 true；否则为 false。

示例

下面的代码示例创建一个新 TraceSwitch 并使用该开关来确定是否发出错误消息。 该开关是在类级别创建的。 MyMethod 如果 Level 属性设置为 TraceLevel.Error 或更高，则写入第一条错误消息。 但是， MyMethod 如果 Level 第二条错误消息小于 TraceLevel.Verbose，则不会写入第二条错误消息。

   // Class-level declaration.
   /* Create a TraceSwitch to use in the entire application.*/
private:
   static TraceSwitch^ mySwitch = gcnew TraceSwitch( "General", "Entire Application" );

public:
   static void MyMethod()
   {
      // Write the message if the TraceSwitch level is set to Error or higher.
      if ( mySwitch->TraceError )
         Console::WriteLine( "My error message." );
      
      // Write the message if the TraceSwitch level is set to Verbose.
      if ( mySwitch->TraceVerbose )
         Console::WriteLine( "My second error message." );
   }

   static void main()
   {
      // Run the method that prints error messages based on the switch level.
      MyMethod();
   }

//Class-level declaration.
/* Create a TraceSwitch to use in the entire application.*/
static TraceSwitch mySwitch = new TraceSwitch("General", "Entire Application");

static public void MyMethod()
{
    // Write the message if the TraceSwitch level is set to Error or higher.
    if (mySwitch.TraceError)
        Console.WriteLine("My error message.");

    // Write the message if the TraceSwitch level is set to Verbose.
    if (mySwitch.TraceVerbose)
        Console.WriteLine("My second error message.");
}

public static void Main(string[] args)
{
    // Run the method that prints error messages based on the switch level.
    MyMethod();
}

' Class-level declaration.
' Create a TraceSwitch to use in the entire application. 
Private Shared mySwitch As New TraceSwitch("General", "Entire Application")    

Public Shared Sub MyMethod()
    ' Write the message if the TraceSwitch level is set to Error or higher.
    If mySwitch.TraceError Then
        Console.WriteLine("My error message.")
    End If 
    ' Write the message if the TraceSwitch level is set to Verbose.
    If mySwitch.TraceVerbose Then
        Console.WriteLine("My second error message.")
    End If
End Sub

Public Shared Sub Main()
    ' Run the method that prints error messages based on the switch level.
    MyMethod()
End Sub

注解

You can use the TraceError, TraceWarning, TraceInfo, and TraceVerbose properties in conjunction with the Debug and Trace classes to emit all messages with a specified importance or greater. 当属性Level设置为最高重要性时， TraceLevel.ErrorError 只会发出错误处理消息。

另请参阅

• TraceSwitch
• Switch
• TraceLevel
• Debug
• Trace