System.Web Namespace   HttpCachePolicy Class

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Sets the ETag HTTP header based on the time stamps of the handler's file dependencies.

[ VB ]
Public Sub SetETagFromFileDependencies ( ) 

[ C# ]
public void SetETagFromFileDependencies ( );

[ C++ ]
public: void SetETagFromFileDependencies ( );

[ JScript ]
public function SetETagFromFileDependencies ( );

Exception Type	Condition
InvalidOperationException	Occurs when the ETag header has already been set.

SetEtagFromFileDependencies sets the ETag header by retrieving the last modified time stamps of all files on which the handler is dependent, combining all file names and time stamps into a single string, then hashing that string into a single digest that is used as the ETag.

The following example sets the ETag header.

[ VB ]
Response.Cache.SetETagFromFileDependencies ( )

[ C# ]
Response.Cache.SetETagFromFileDependencies ( );

[ JScript ] 
Response.Cache.SetETagFromFileDependencies ( )

HttpCachePolicy Members   Caching ASP.NET Pages

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