BooleanSwitch.Enabled 属性

定义

命名空间:

System.Diagnostics

程序集:

System.Diagnostics.TraceSource.dll

Source:

BooleanSwitch.cs

获取或设置一个指示开关已启用还是已禁用的值。

public:
 property bool Enabled { bool get(); void set(bool value); };

public bool Enabled { get; set; }

member this.Enabled : bool with get, set

Public Property Enabled As Boolean

属性值

Boolean

如果开关已启用，则为 true；否则为 false。 默认值为 false。

例外

SecurityException

调用方没有正确的权限。

示例

下面的代码示例创建 并使用 BooleanSwitch 开关确定是否打印错误消息。 开关是在类级别创建的。 方法 Main 将其位置传递给 MyMethod，这将输出错误消息和发生错误的位置。

public ref class BooleanSwitchTest
{
private:

   /* Create a BooleanSwitch for data.*/
   static BooleanSwitch^ dataSwitch = gcnew BooleanSwitch( "Data","DataAccess module" );

public:
   static void MyMethod( String^ location )
   {
      
      //Insert code here to handle processing.
      if ( dataSwitch->Enabled )
            Console::WriteLine( "Error happened at {0}", location );
   }

};

int main()
{
   
   //Run the method that writes an error message specifying the location of the error.
   BooleanSwitchTest::MyMethod( "in main" );
}

//Class level declaration.
/* Create a BooleanSwitch for data.*/
static BooleanSwitch dataSwitch = new BooleanSwitch("Data", "DataAccess module");

static public void MyMethod(string location)
{
    //Insert code here to handle processing.
    if (dataSwitch.Enabled)
        Console.WriteLine("Error happened at " + location);
}

public static void Main(string[] args)
{
    //Run the method that writes an error message specifying the location of the error.
    MyMethod("in Main");
}

'Class level declaration.
' Create a BooleanSwitch for data. 
Private Shared dataSwitch As New BooleanSwitch("Data", "DataAccess module")


Public Shared Sub MyMethod(location As String)
    'Insert code here to handle processing.
    If dataSwitch.Enabled Then
        Console.WriteLine(("Error happened at " + location))
    End If
End Sub

'Entry point which delegates to C-style main Private Function
Public Overloads Shared Sub Main()
    Main(System.Environment.GetCommandLineArgs())
End Sub
 
Overloads Public Shared Sub Main(args() As String)
    'Run the method that writes an error message specifying the location of the error.
    MyMethod("in Main")
End Sub

注解

默认情况下，此字段设置为 false (禁用) 。 若要启用开关，请为此字段分配 值 true。 若要禁用开关，请将值分配给 false。 此属性的值由基类属性 SwitchSetting的值确定。

另请参阅

• BooleanSwitch
• Switch
• Debug
• Trace