AggregateCacheDependency.GetUniqueID 方法

public:
 override System::String ^ GetUniqueID();

public override string GetUniqueID();

override this.GetUniqueID : unit -> string

Public Overrides Function GetUniqueID () As String

返回

对象的唯一标识符 AggregateCacheDependency 。 如果其中一个关联的依赖项对象没有唯一标识符，该方法 GetUniqueID() 将 null返回。

示例

下面的代码示例使用 GetUniqueID 该方法创建和显示类实例的 AggregateCacheDependency 标识符，命名 aggDep后，创建并填充该实例。

         ' 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)

注解

此方法为数组中的每个依赖项分配唯一标识符，并返回每个依赖项。 标识符是文件名（对于文件依赖项）或密钥名称（对于缓存键依赖项）和此方法分配给依赖项的字符串的组合。