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HttpResponse.AddFileDependency Method

Adds a single file name to the collection of file names on which the current response is dependent.

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

public void AddFileDependency(
	string filename
)

Parameters

filename
Type: System.String

The name of the file to add.

When you use the AddFileDependency method to add a file dependency, you must also specify output caching programmatically or declaratively. For example, to specify output caching declaratively, use the @ OutputCache directive. For more information, see How to: Cache Page Output with File Dependencies.

The following example shows how to add a single file name to the AddFileDependency file dependency list. If the file changes, the cached response is invalidated.

String FileName;
 FileName = "C:\\Files\\F1.txt";
 Response.AddFileDependency(FileName);
    

.NET Framework

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