TraceSource.GetSupportedAttributes Method
Definition
Important
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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()Returns
A string array naming the custom attributes supported by the trace source, or null if there are no custom attributes.
Examples
The 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
Remarks
The default implementation for GetSupportedAttributes returns null.
Notes to Inheritors
When inheriting from the TraceSource class or a derived class, you can override the GetSupportedAttributes() method to provide custom attributes for your class.
