AggregateCacheDependency.GetUniqueID Method

Retrieves a unique identifier for the AggregateCacheDependency object.

Namespace: System.Web.Caching
Assembly: System.Web (in system.web.dll)

public:
virtual String^ GetUniqueID () override
public String GetUniqueID ()
public override function GetUniqueID () : String
Not applicable.

Return Value

The unique identifier for the AggregateCacheDependency object. If one of the associated dependency objects does not have a unique identifier, the GetUniqueId method returns a null reference (Nothing in Visual Basic).

This method assigns a unique identifier to each dependency in the array and returns each of them. The identifier is a combination of either the file name (for a file dependency) or the key name (for a cache-key dependency) and a string that this method assigns to the dependency.

The following code example uses the GetUniqueID method to create and display an identifier for an instance of the AggregateCacheDependency class, named aggDep, once it is created and populated.

' Create two CacheDependency objects, one to a
' text file and the other to an XML file. 
' Create a CacheDependency array with these 
' two objects as items in the array.
 txtDep = New CacheDependency(Server.MapPath("Storage.txt"))
 xmlDep = New CacheDependency(Server.MapPath("authors.xml"))
 Dim DepArray() As CacheDependency = {txtDep, xmlDep}

 ' Create an AggregateCacheDependency object and 
 ' use the Add method to add the array to it.   
 aggDep = New AggregateCacheDependency()
 aggDep.Add(DepArray)
    
 ' Call the GetUniqueId method to generate
 ' an ID for each dependency in the array.
 msg1.Text = aggDep.GetUniqueId()
 
 ' Add the new data set to the cache with 
 ' dependencies on both files in the array.
 Cache.Insert("XMLDataSet", Source, aggDep)

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

Community Additions

ADD
Show: