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Page.Trace Property

Gets the TraceContext object for the current Web request.

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

'Declaration
<BrowsableAttribute(False)> _
Public ReadOnly Property Trace As TraceContext
'Usage
Dim instance As Page 
Dim value As TraceContext 

value = instance.Trace

Property Value

Type: System.Web.TraceContext
Data from the TraceContext object for the current Web request.

Tracing tracks and presents the execution details about a Web request. For trace data to be visible in a rendered page, you must enable tracing at the page or application level.

Tracing on a page is disabled by default. To enable tracing for a page, use the @ Page directive <% @ Page trace="true" %>. To enable tracing for an entire application, you must enable it in the application's configuration file, Web.config, which resides in the root directory of the application. For more information, see ASP.NET Tracing Overview.

The following code example demonstrates accessing the TraceContext.IsEnabled property and the TraceContext.Write method through the Trace property. This code calls the Write method only when tracing is enabled for the Page object. If it is not enabled, this code will not run, which can help reduce overhead for your application.

If (Trace.IsEnabled) Then 

  Dim I As Integer 
  For I = 0 To DS.Tables("Categories").Rows.Count - 1

    Trace.Write("ProductCategory",DS.Tables("Categories").Rows(I)(0).ToString())
  Next 
End If

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

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