Response.AppendToLog Method

The AppendToLog method adds a string to the end of the Web server log entry for the request. You can use it multiple times in one section of script. Each time the method is used, it appends the specified string to the existing entry.



  • string
    The text to append to the log file. Because fields in the log are comma-delimited, this string cannot contain any commas (,).

Return Values

This method has no return values.

Example Code

The following example adds the text "content updated" to the log file:

<% Response.AppendToLog "My custom log message" %>

Applies To

Response Object


To record the specified string in the log file, you must enable the URI Query option of the Extended Properties property sheet for the site whose activity you want to log. To access this property sheet, from IIS Manager, right-click the Web site, and select Properties. On the Web Site tab, verify that Enable Logging is selected, and then click Properties. Note the default settings on the Extended Properties property sheet.


Client: Requires Windows XP Professional, Windows 2000 Professional, or Windows NT Workstation 4.0.

Server: Requires Windows Server 2003, Windows 2000 Server, or Windows NT Server 4.0.

Product: IIS