TraceSource.GetSupportedAttributes 方法

定义

获取跟踪源所支持的自定义特性。Gets the custom attributes supported by the trace source.

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()

返回

String[]

对跟踪源支持的自定义特性进行命名的字符串数组;如果不存在自定义特性,则为 nullA string array naming the custom attributes supported by the trace source, or null if there are no custom attributes.

示例

下面的代码示例演示如何重写 GetSupportedAttributes 方法以标识类的自定义特性 MyTraceSourceThe following code example shows an override of the GetSupportedAttributes method to identify the custom attributes for the MyTraceSource class.

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

注解

的默认实现 GetSupportedAttributes 返回 nullThe default implementation for GetSupportedAttributes returns null.

继承者说明

TraceSource 类或派生类继承时,可以重写 GetSupportedAttributes() 方法以为类提供自定义特性。When inheriting from the TraceSource class or a derived class, you can override the GetSupportedAttributes() method to provide custom attributes for your class.

适用于