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HttpResponse.AppendToLog Method

Adds custom log information to the Internet Information Services (IIS) log file.

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

[AspNetHostingPermissionAttribute(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Medium)]
public void AppendToLog(
	string param


Type: System.String

The text to add to the log file.

To allow for the specified string to be recorded in the log file, you first must enable the URI Query option of the Extended Logging Properties dialog box for the site that you want to log activity for in IIS.

To customize extended logging in IIS 6.0, follow these steps:

  1. In IIS Manager, expand the local computer node, expand the Web or FTP Sites folder, right-click the Web or FTP site, and then click Properties.

  2. Click the Web or FTP Site tab, and then select the Enable logging check box (if it is not already selected).

  3. In the Active log format box, click W3C Extended Log File Format.

  4. Click Properties.

  5. Click the Advanced tab, select the properties that you want to log, and then click OK.

The following example shows how to append a string to the log.

Response.AppendToLog("Page delivered");

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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