This documentation is archived and is not being maintained.

TraceContextEventArgs.TraceRecords Property

Gets a collection of TraceContextRecord messages that are associated with the current request.

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

'Declaration
Public ReadOnly Property TraceRecords As ICollection

Property Value

Type: System.Collections.ICollection
A collection of trace records that are associated with the current request.

Every call to the TraceContext.Write and TraceContext.Warn methods generates a TraceContextRecord object that is added to the TraceRecords messages collection. The Warn method call sets the IsWarning property to true, while the other method calls set it to false.

You can iterate through the TraceRecords messages and examine records with specific categories or messages, and whether they are warnings.

TopicLocation
Walkthrough: Using Tracing in Visual Web Developer to Help Find Web Page ErrorsBuilding ASP .NET Web Applications in Visual Studio

The following code example demonstrates how you can register a TraceContextEventHandler delegate to handle the TraceFinished event. In this example, the OnTraceFinished method accesses the collection of TraceContextRecord objects through the TraceRecords property, iterates through them, and writes them to the response stream.


<%@ Page language="VB" Trace="true" %>
<script runat="server">
' The Page_Load method.
Private Sub Page_Load(sender As Object, e As EventArgs)

    ' Register a handler for the TraceFinished event.
    AddHandler Trace.TraceFinished, AddressOf OnTraceFinished

    ' Write a trace message.
    Trace.Write("Web Forms Infrastructure Methods", "USERMESSAGE: Page_Load complete.")
End Sub ' Page_Load

' A TraceContextEventHandler for the TraceFinished event.
Private Sub OnTraceFinished(sender As Object, e As TraceContextEventArgs)

    Dim r As TraceContextRecord
    Dim o As Object

    ' Iterate through the collection of trace records and write 
    ' them to the response stream.

    For Each o In e.TraceRecords
        r = CType(o, TraceContextRecord)
        Response.Write(String.Format("trace message: {0} <BR>", r.Message))
    Next

End Sub ' OnTraceFinished
</script>


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Show: