IHttpContext::GetTraceContext Method

IIS 7.0
 

Retrieves the trace context container for the current context.

virtual IHttpTraceContext* GetTraceContext(
   VOID
) const = 0;

This method takes no parameters.

A pointer to an IHttpTraceContext interface.

Use either the IHttpContext::GetTraceContext or IHttpServer::GetTraceContext method to retrieve an IHttpTraceContext interface when you need to raise an event that is associated with an HTTP request. When you need to raise an event that is not associated with an HTTP request, use only the IHttpServer::GetTraceContext method to retrieve an IHttpTraceContext interface.

Example

The following code example demonstrates how to create an HTTP module that performs the following tasks:

  1. Retrieves a pointer to an IHttpTraceContext interface by using the IHttpContext::GetTraceContext method.

  2. Retrieves the trace activity GUID by using the IHttpTraceContext::GetTraceActivityId method.

  3. Creates a string that contains the trace activity GUID and writes the string to the Event Viewer.

Your module must export the RegisterModule function. You can export this function by creating a module definition (.def) file for your project, or you can compile the module by using the /EXPORT:RegisterModule switch. For more information, see Walkthrough: Creating a Request-Level HTTP Module By Using Native Code.

You can optionally compile the code by using the __stdcall (/Gz) calling convention instead of explicitly declaring the calling convention for each function.

Requirements

Type

Description

Client

  • IIS 7.0 on Windows Vista

  • IIS 7.5 on Windows 7

  • IIS 8.0 on Windows 8

  • IIS 10.0 on Windows 10

Server

  • IIS 7.0 on Windows Server 2008

  • IIS 7.5 on Windows Server 2008 R2

  • IIS 8.0 on Windows Server 2012

  • IIS 8.5 on Windows Server 2012 R2

  • IIS 10.0 on Windows Server 2016 Technical Preview

Product

  • IIS 7.0, IIS 7.5, IIS 8.0, IIS 8.5, IIS 10.0

  • IIS Express 7.5, IIS Express 8.0, IIS Express 10.0

Header

Httpserv.h

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