TraceContextRecord.Category Property


Gets the user-defined category for the trace record.

Namespace:   System.Web
Assembly:  System.Web (in System.Web.dll)

public string Category { get; }

Property Value

Type: System.String

A string that represents a category for the trace record.

The category is used to better organize trace messages into recognizable groups, but can be any string. The TraceContext class uses String.Empty as its default category for methods that take only a message parameter. The default category for ASP.NET, which writes several trace records when tracing is enabled, is "".

The following code example demonstrates how to access the Category property of a TraceContextRecord, and print it and its associated trace message to the Response stream.

<%@ 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 

    // Write a trace message.
    Trace.Write("Web Forms Infrastructure Methods", "USERMESSAGE: Page_Load complete.");

// 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;
        Response.Write(String.Format("<tr><td>{0}</td><td>{1}</td></tr>", r.Message, r.Category));        

.NET Framework
Available since 2.0
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