.NET Session操作

 public class SessionHelper
     {
         /// <summary>
         /// 根据session名获取session对象
         /// </summary>
         /// <param name="name"></param>
         /// <returns></returns>
         public static object GetSession(string name)
         {
             return HttpContext.Current.Session[name];
         }
         /// <summary>
         /// 设置session
         /// </summary>
         /// <param name="name">session 名</param>
         /// <param name="val">session 值</param>
         public static void SetSession(string name, object val)
         {
             HttpContext.Current.Session.Remove(name);
             HttpContext.Current.Session.Add(name, val);
         }
         /// <summary>
         /// 添加Session，调动有效期为20分钟
         /// </summary>
         /// <param name="strSessionName">Session对象名称</param>
         /// <param name="strValue">Session值</param>
         public static void Add(string strSessionName, string strValue)
         {
             HttpContext.Current.Session[strSessionName] = strValue;
             HttpContext.Current.Session.Timeout = ;
         }

         /// <summary>
         /// 添加Session，调动有效期为20分钟
         /// </summary>
         /// <param name="strSessionName">Session对象名称</param>
         /// <param name="strValues">Session值数组</param>
         public static void Adds(string strSessionName, string[] strValues)
         {
             HttpContext.Current.Session[strSessionName] = strValues;
             HttpContext.Current.Session.Timeout = ;
         }

         /// <summary>
         /// 添加Session
         /// </summary>
         /// <param name="strSessionName">Session对象名称</param>
         /// <param name="strValue">Session值</param>
         /// <param name="iExpires">调动有效期（分钟）</param>
         public static void Add(string strSessionName, string strValue, int iExpires)
         {
             HttpContext.Current.Session[strSessionName] = strValue;
             HttpContext.Current.Session.Timeout = iExpires;
         }

         /// <summary>
         /// 添加Session
         /// </summary>
         /// <param name="strSessionName">Session对象名称</param>
         /// <param name="strValues">Session值数组</param>
         /// <param name="iExpires">调动有效期（分钟）</param>
         public static void Adds(string strSessionName, string[] strValues, int iExpires)
         {
             HttpContext.Current.Session[strSessionName] = strValues;
             HttpContext.Current.Session.Timeout = iExpires;
         }

         /// <summary>
         /// 读取某个Session对象值
         /// </summary>
         /// <param name="strSessionName">Session对象名称</param>
         /// <returns>Session对象值</returns>
         public static string Get(string strSessionName)
         {
             if (HttpContext.Current.Session[strSessionName] == null)
             {
                 return null;
             }
             else
             {
                 return HttpContext.Current.Session[strSessionName].ToString();
             }
         }

         public static void Set<T>(string strSessionName, T value) where T : class , new()
         {
             HttpContext.Current.Session[strSessionName] = value;
             HttpContext.Current.Session.Timeout =  * ;
         }

         /// <summary>
         /// 读取某个Session对象值
         /// </summary>
         /// <param name="strSessionName">Session对象名称</param>
         /// <returns>Session对象值</returns>
         public static T Get<T>(string strSessionName) where T : class , new()
         {
             if (HttpContext.Current == null || HttpContext.Current.Session == null || HttpContext.Current.Session[strSessionName] == null)
             {
                 return null;
             }
             else
             {
                 return HttpContext.Current.Session[strSessionName] as T;
             }
         }

         /// <summary>
         /// 读取某个Session对象值数组
         /// </summary>
         /// <param name="strSessionName">Session对象名称</param>
         /// <returns>Session对象值数组</returns>
         public static string[] Gets(string strSessionName)
         {
             if (HttpContext.Current.Session[strSessionName] == null)
             {
                 return null;
             }
             else
             {
                 return (string[])HttpContext.Current.Session[strSessionName];
             }
         }

         /// <summary>
         /// 删除某个Session对象
         /// </summary>
         /// <param name="strSessionName">Session对象名称</param>
         public static void Del(string strSessionName)
         {
             HttpContext.Current.Session[strSessionName] = null;
         }
     }