TraceContextRecord.IsWarning Property

Definition

Namespace:

System.Web

Assembly:

System.Web.dll

Gets a value indicating whether the trace record is associated with a Warn method call.

C#

public bool IsWarning { get; }

Property Value

Boolean

true if the TraceContextRecord is associated with the Warn method call; otherwise, false.

Examples

The following code example demonstrates how to check the IsWarning property of a TraceContextRecord to determine whether the message that the record contains was written by a Warn or Write method call. If the trace record is a warning message, a different action is taken than if it is an error message.

ASP.NET (C#)

<%@ Page language="c#" Trace="true" %>
<script runat="server">
void Page_Load(object sender, EventArgs e)
{
    // Register a handler for the TraceFinished event.
    Trace.TraceFinished += new 
        TraceContextEventHandler(this.OnTraceFinished);

    try {
        throw new ArgumentException("Trace Test");
    }
    catch (InvalidOperationException ioe) {    
        // You can write an error trace message using the Write method.
        Trace.Write("Exception Handling", "Exception: Page_Load.", ioe);
    }
    catch (ArgumentException ae) {    
        // You can write a warning trace message using the Warn method.
        Trace.Warn("Exception Handling", "Warning: Page_Load.", ae);
    }
}
 
// A TraceContextEventHandler for the TraceFinished event.
void OnTraceFinished(object sender, TraceContextEventArgs e)
{
    TraceContextRecord r = null;    
    
    // Iterate through the collection of trace records and write 
    // them to the response stream.
    foreach(object o in e.TraceRecords)
    { 
        r = (TraceContextRecord)o;
        if (r.IsWarning) {
            Response.Write(String.Format("warning message: {0} <BR>", r.Message));
        }
        else {
            Response.Write(String.Format("error message: {0} <BR>", r.Message));
        }

    }
}       
</script>

Applies to

See also

• ASP.NET Tracing Overview