TraceSource.GetSupportedAttributes Metod

protected:
 virtual cli::array <System::String ^> ^ GetSupportedAttributes();

protected public:
 virtual cli::array <System::String ^> ^ GetSupportedAttributes();

protected virtual string[]? GetSupportedAttributes();

protected virtual string[] GetSupportedAttributes();

protected internal virtual string[] GetSupportedAttributes();

abstract member GetSupportedAttributes : unit -> string[]
override this.GetSupportedAttributes : unit -> string[]

Protected Overridable Function GetSupportedAttributes () As String()

Protected Friend Overridable Function GetSupportedAttributes () As String()

Returer

En strängmatris som namnger anpassade attribut som stöds av spårningskällan eller null om det inte finns några anpassade attribut.

Exempel

I följande kodexempel visas en åsidosättning av GetSupportedAttributes metoden för att identifiera de anpassade attributen MyTraceSource för klassen.

public class MyTraceSource : TraceSource
{
    string firstAttribute = "";
    string secondAttribute = "";
    public MyTraceSource(string n) : base(n) {}

    public string FirstTraceSourceAttribute
    {
        get {
            foreach (DictionaryEntry de in this.Attributes)
                if (de.Key.ToString().ToLower() == "firsttracesourceattribute")
                    firstAttribute = de.Value.ToString() ;
            return firstAttribute;
        }
        set { firstAttribute = value; }
    }

    public string SecondTraceSourceAttribute
    {
        get {
            foreach (DictionaryEntry de in this.Attributes)
                if (de.Key.ToString().ToLower() == "secondtracesourceattribute")
                    secondAttribute = de.Value.ToString();
            return secondAttribute; }
        set { secondAttribute = value; }
    }

    protected override string[] GetSupportedAttributes()
    {
        // Allow the use of the attributes in the configuration file.
        return new string[] { "FirstTraceSourceAttribute", "SecondTraceSourceAttribute" };
    }
}

Public Class MyTraceSource
    Inherits TraceSource
    Private firstAttribute As String = ""
    Private secondAttribute As String = ""

    Public Sub New(ByVal n As String)
        MyBase.New(n)

    End Sub

    Public Property FirstTraceSourceAttribute() As String
        Get
            Dim de As DictionaryEntry
            For Each de In Me.Attributes
                If de.Key.ToString().ToLower() = "firsttracesourceattribute" Then
                    firstAttribute = de.Value.ToString()
                End If
            Next de
            Return firstAttribute
        End Get
        Set(ByVal value As String)
            firstAttribute = value
        End Set
    End Property

    Public Property SecondTraceSourceAttribute() As String
        Get
            Dim de As DictionaryEntry
            For Each de In Me.Attributes
                If de.Key.ToString().ToLower() = "secondtracesourceattribute" Then
                    secondAttribute = de.Value.ToString()
                End If
            Next de
            Return secondAttribute
        End Get
        Set(ByVal value As String)
            secondAttribute = Value
        End Set
    End Property

    Protected Overrides Function GetSupportedAttributes() As String()
        ' Allow the use of the attributes in the configuration file.
        Return New String() {"FirstTraceSourceAttribute", "SecondTraceSourceAttribute"}

    End Function 'GetSupportedAttributes
End Class

Kommentarer

Standardimplementeringen för GetSupportedAttributes returnerar null.

Anteckningar till arvingar

När du ärver från TraceSource klassen eller en härledd klass kan du åsidosätta GetSupportedAttributes() metoden för att tillhandahålla anpassade attribut för klassen.