在程序中經常需要用到一些內存緩存，每個獲取到的數據都需要重新實現一遍緩存處理，代碼冗余，基於此，現提供一種通用的內存緩存實現，直接上代碼：
/// <summary>
/// 獲取緩存對象
/// </summary>
/// <typeparam name="T">緩存實體對象</typeparam>
/// <param name="dele">實體數據獲取方法</param>
/// <param name="cacheKey">緩存關鍵字</param>
/// <param name="cacheDuration">緩存時間(分鐘)</param>
/// <param name="objs">實體數據獲取參 </param>
/// <returns>參數T </returns>
public static T GetCacheData<T>( Delegate dele, string cacheKey, int cacheDuration, params ob ject [] objs)
{
if ( HttpRuntime.Cache.Get(cacheKey) == null )
{
string assemblyName = dele.Target.GetType().Assembly.FullName;
string typeName = dele.Target.GetType().FullName;
ob ject instance = Assembly.Load(assemblyName).CreateInstance(typeName);
MethodInfo methodInfo = dele.Method;
T result = (T)methodInfo.Invoke(instance, objs);
HttpRuntime.Cache.Add(cacheKey, result, null , Cache.NoAbsoluteExpiration, TimeSpan .FromMinutes(cacheDuration), CacheItemPriority.NotRemovable, null );
}
return (T) HttpRuntime.Cache[cacheKey];
}
使用HttpRuntime.Cache緩存數據，緩存數據不存在，用委托和反射調用業務方法獲取業務數據並緩存。使用如下：
string result = CacheHelper.GetCacheData<string>(new Func<string, string>(cacheTest.GetMyData), "one", 5, "test");
附上另一個可能會重載的版本：
public static TResult GetCacheData<T1, T2, TResult>(Func<T1, T2, TResult> func, string cacheKey, int cacheTime, T1 para1, T2 para2)
{
if (HttpRuntime.Cache.Get(cacheKey) == null)
{
Console.WriteLine("未命中緩存");
TResult result = func(para1, para2);
HttpRuntime.Cache.Add(cacheKey, result, null, Cache.NoAbsoluteExpiration, TimeSpan.FromMinutes(cacheTime), CacheItemPriority.NotRemovable, null);
return result;
}
Console.WriteLine("命中緩存");
return (TResult)HttpRuntime.Cache.Get(cacheKey);
}
