共用方式為


TraceSource.GetSupportedAttributes 方法

定義

取得由追蹤來源所支援的自訂屬性。

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()

傳回

String[]

字串陣列,由追蹤來源支援的自訂屬性。如果沒有自訂屬性,則為 null

範例

下列程式代碼範例示範 方法的 GetSupportedAttributes 覆寫,以識別 類別的 MyTraceSource 自定義屬性。

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

備註

預設實作會 GetSupportedAttributesnull回 。

給繼承者的注意事項

TraceSource 類別或衍生類別繼承時,您可以覆寫 GetSupportedAttributes() 方法,以提供類別的自定義屬性。

適用於