Writes information about the trace to the trace listeners in the Listeners collection.

Overload List

Writes the value of the object's ToString method to the trace listeners in the Listeners collection.

[Visual Basic] Overloads Public Shared Sub WriteLine(Object)

[C#] public static void WriteLine(object);

[C++] public: static void WriteLine(Object*);

[JScript] public static function WriteLine(Object);

Writes a message to the trace listeners in the Listeners collection.

[Visual Basic] Overloads Public Shared Sub WriteLine(String)

[C#] public static void WriteLine(string);

[C++] public: static void WriteLine(String*);

[JScript] public static function WriteLine(String);

Writes a category name and the value of the object's ToString method to the trace listeners in the Listeners collection.

[Visual Basic] Overloads Public Shared Sub WriteLine(Object, String)

[C#] public static void WriteLine(object, string);

[C++] public: static void WriteLine(Object*, String*);

[JScript] public static function WriteLine(Object, String);

Writes a category name and message to the trace listeners in the Listeners collection.

[Visual Basic] Overloads Public Shared Sub WriteLine(String, String)

[C#] public static void WriteLine(string, string);

[C++] public: static void WriteLine(String*, String*);

[JScript] public static function WriteLine(String, String);

Example

[Visual Basic, C#, JScript] The following example creates a TraceSwitch named generalSwitch. This switch is set outside the code sample.

[Visual Basic, C#, JScript] If the switch is set to the TraceLevel Error or higher, the example outputs the first error message to the Listeners. For information on adding a listener to the Listeners collection, see the TraceListenerCollection class.

[Visual Basic, C#, JScript] Then, if the TraceLevel is set to Verbose, the example outputs the second error message and the category on the same line as the first message. The second message is followed by a line terminator.

[Visual Basic, C#, JScript] Note   This example shows how to use one of the overloaded versions of WriteLine. For other examples that might be available, see the individual overload topics.

[Visual Basic] 
' Class-level declaration.
' Create a TraceSwitch.
Private Shared generalSwitch As New TraceSwitch("General", "Entire Application")

Public Shared Sub MyErrorMethod(category As String)
    ' Write the message if the TraceSwitch level is set to Error or higher.
    If generalSwitch.TraceError Then
        Trace.Write("My error message. ")
    End If 
    ' Write a second message if the TraceSwitch level is set to Verbose.
    If generalSwitch.TraceVerbose Then
        Trace.WriteLine("My second error message.", category)
    End If
End Sub


[C#] 
// Class-level declaration.
 // Create a TraceSwitch.
 static TraceSwitch generalSwitch = new TraceSwitch("General", "Entire Application");
 
 static public void MyErrorMethod(String category) {
    // Write the message if the TraceSwitch level is set to Error or higher.
    if(generalSwitch.TraceError)
       Trace.Write("My error message. ");
 
    // Write a second message if the TraceSwitch level is set to Verbose.
    if(generalSwitch.TraceVerbose)
       Trace.WriteLine("My second error message.", category);
 }


[JScript] 
// Create a TraceSwitch.
var generalSwitch : TraceSwitch = new TraceSwitch("General", "Entire Application")

function MyErrorMethod(myObject : Object, category : String){
  // Write the message if the TraceSwitch level is set to Verbose.
  if(generalSwitch.TraceVerbose)
    Trace.WriteLine(myObject.ToString() + " is not a valid object for category: ", category)
  
  // Write a second message if the TraceSwitch level is set to Error or higher.
  if(generalSwitch.TraceError)
    Trace.WriteLine(" Please use a different category.")
}

[C++] No example is available for C++. To view a Visual Basic, C#, or JScript example, click the Language Filter button in the upper-left corner of the page.

See Also

Trace Class | Trace Members | System.Diagnostics Namespace