TraceSwitch.TraceInfo 属性

获取一个值，它指示开关是否允许信息性消息。

**命名空间:**System.Diagnostics
**程序集:**System（在 system.dll 中）

语法

声明
Public ReadOnly Property TraceInfo As Boolean
用法
Dim instance As TraceSwitch
Dim value As Boolean

value = instance.TraceInfo

public bool TraceInfo { get; }

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

/** @property */
public boolean get_TraceInfo ()

public function get TraceInfo () : boolean

属性值

如果 Level 属性设置为 TraceLevel.Info 或 TraceLevel.Verbose，则为 true；否则为 false。

备注

可以将 TraceError、TraceWarning、TraceInfo 和 TraceVerbose 属性与 Debug 和 Trace 类结合使用，发出具有指定或更高重要性的所有消息。当 Level 属性设置为 TraceLevel.Warning 时，发出信息性消息、警告和错误处理消息。

示例

下面的代码示例创建一个新的 TraceSwitch 并使用此开关确定是否发出错误信息。此开关在类级别创建。如果 Level 属性设置为 TraceLevel.Info 或更高级别，MyMethod 会写入第一条错误信息。但是，当 Level 小于 TraceLevel.Verbose 时，MyMethod 将不写入第二条错误信息。

' 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 Info or higher.
    If mySwitch.TraceInfo 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

//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 Info or higher.
    if(mySwitch.TraceInfo)
       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:
   static TraceSwitch^ mySwitch = gcnew TraceSwitch( "General", "Entire Application" );

public:
   static void MyMethod()
   {
      // Write the message if the TraceSwitch level is set to Info or higher.
      if ( mySwitch->TraceInfo )
         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.
 */
private static TraceSwitch mySwitch = 
    new TraceSwitch("General", "Entire Application");

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

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

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

平台

Windows 98、Windows 2000 SP4、Windows Millennium Edition、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

请参见

参考

TraceSwitch 类
TraceSwitch 成员
System.Diagnostics 命名空间
TraceSwitch 类
Switch 类
TraceLevel 枚举
Debug 类
Trace 类