TraceSwitch.TraceWarning 屬性
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
取得值，表示此參數是否允許警告訊息。
public:
property bool TraceWarning { bool get(); };C#
public bool TraceWarning { get; }member this.TraceWarning : boolPublic ReadOnly Property TraceWarning As Boolean如果 Level 設定為 Warning、Info 或 Verbose，則為 true，否則為 false。
下列程式代碼範例會建立新的 TraceSwitch ，並使用 參數來判斷是否要發出錯誤訊息。 參數會在類別層級建立。
MyMethod如果屬性設定為 TraceLevel.Warning 或更新版本，則會Level寫入第一個錯誤訊息。 不過，MyMethod當小於 TraceLevel.Verbose時Level，不會寫入第二個錯誤訊息。
// 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 Warning or higher.
if ( mySwitch->TraceWarning )
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();
}
C#
//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 Warning or higher.
if (mySwitch.TraceWarning)
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 Warning or higher.
If mySwitch.TraceWarning 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
您可以搭配 Debug 和 Trace 類別使用TraceError、 TraceInfoTraceWarning和 TraceVerbose 屬性，以發出具有指定重要性或更高的所有訊息。 Level當屬性設定為 TraceLevel.Warning時，就會發出警告和錯誤處理訊息。
| 產品 | 版本 |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
