string cacheKey = Request.Url.ToString(); 
Cache[cacheKey] = new object(); 
Response.AddCacheItemDependency(cacheKey);

private void bindCache() 
{ 
DataTable dt = new DataTable(); 
dt.Columns.Add("CacheName",typeof(string)); 
dt.Columns.Add("CacheType",typeof(string)); 
IDictionaryEnumerator CacheEnum = 
HttpRuntime.Cache.GetEnumerator(); 
while (CacheEnum.MoveNext()) 
{ 
DataRow dr = dt.NewRow(); 
dr["CacheName"] = CacheEnum.Key; 
dr["CacheType"] = CacheEnum.Value.GetType(); 
dt.Rows.Add(dr); 
} 

DataView dv = dt.DefaultView; 
dv.Sort = "CacheName"; 
this.DataGrid1.DataSource =dt; 
this.DataGrid1.DataBind(); 
} 

string cacheKey = e.Item.Cells[0].Text; 
if(Cache[cacheKey]!=null) 
{ 
Cache.Remove(cacheKey); 
bindCache(); 
}