各种Helper代码

/// <summary>
/// 服务器缓存帮助类
/// </summary>
public class CacheHelper
{
/// <summary>
/// 创建缓存项的文件依赖
/// </summary>
/// <param name="key">缓存Key</param>
/// <param name="obj">object对象</param>
/// <param name="fileName">文件绝对路径</param>
public static void InsertFile(string key, object obj, string fileName)
{
//创建缓存依赖项
CacheDependency dep = new CacheDependency(fileName);
//创建缓存
HttpRuntime.Cache.Insert(key, obj, dep);
}

/// <summary>
/// 创建缓存项过期
/// </summary>
/// <param name="key">缓存Key</param>
/// <param name="obj">object对象</param>
public static void Insert(string key, object obj)
{
if (obj != null)
{
if (IsExist(key))
{
HttpRuntime.Cache[key] = obj;
}
else
{
int expires = ConvertHelper.ToInt(ConfigHelper.GetAppSettings("TimeCache"));
HttpRuntime.Cache.Insert(key, obj, null, System.Web.Caching.Cache.NoAbsoluteExpiration, new TimeSpan(0, expires, 0));
}

}
}
/// <summary>
/// 判断缓存对象是否存在
/// </summary>
/// <param name="strKey">缓存键值名称</param>
/// <returns>是否存在true 、false</returns>
public static bool IsExist(string strKey)
{
return HttpRuntime.Cache[strKey] != null;
}
/// <summary>
/// 获取缓存对象
/// </summary>
/// <param name="key">缓存Key</param>
/// <returns>object对象</returns>
public static object GetCache(string key)
{
if (string.IsNullOrEmpty(key))
return null;
if (ConfigHelper.GetAppSettings("IsCache") == "false")
{
return null;
}

return HttpRuntime.Cache.Get(key);
}

/// <summary>
/// 获取缓存对象
/// </summary>
/// <typeparam name="T">T对象</typeparam>
/// <param name="key">缓存Key</param>
/// <returns></returns>
public static T Get<T>(string key)
{
object obj = GetCache(key);
return obj == null ? default(T) : (T)obj;
}

/// <summary>
/// 移除指定数据缓存
/// </summary>
public static void RemoveCache(string CacheKey)
{
System.Web.Caching.Cache _cache = HttpRuntime.Cache;
_cache.Remove(CacheKey);
}

/// <summary>
/// 移除全部缓存
/// </summary>
public static void RemoveAllCache()
{
System.Web.Caching.Cache _cache = HttpRuntime.Cache;
IDictionaryEnumerator CacheEnum = _cache.GetEnumerator();
while (CacheEnum.MoveNext())
{
_cache.Remove(CacheEnum.Key.ToString());
}
}
}