.NET Session操作

  1 public class SessionHelper
  2     {
  3         /// <summary>
  4         /// 根据session名获取session对象
  5         /// </summary>
  6         /// <param name="name"></param>
  7         /// <returns></returns>
  8         public static object GetSession(string name)
  9         {
 10             return HttpContext.Current.Session[name];
 11         }
 12         /// <summary>
 13         /// 设置session
 14         /// </summary>
 15         /// <param name="name">session 名</param>
 16         /// <param name="val">session 值</param>
 17         public static void SetSession(string name, object val)
 18         {
 19             HttpContext.Current.Session.Remove(name);
 20             HttpContext.Current.Session.Add(name, val);
 21         }
 22         /// <summary>
 23         /// 添加Session，调动有效期为20分钟
 24         /// </summary>
 25         /// <param name="strSessionName">Session对象名称</param>
 26         /// <param name="strValue">Session值</param>
 27         public static void Add(string strSessionName, string strValue)
 28         {
 29             HttpContext.Current.Session[strSessionName] = strValue;
 30             HttpContext.Current.Session.Timeout = 20;
 31         }
 32 
 33         /// <summary>
 34         /// 添加Session，调动有效期为20分钟
 35         /// </summary>
 36         /// <param name="strSessionName">Session对象名称</param>
 37         /// <param name="strValues">Session值数组</param>
 38         public static void Adds(string strSessionName, string[] strValues)
 39         {
 40             HttpContext.Current.Session[strSessionName] = strValues;
 41             HttpContext.Current.Session.Timeout = 20;
 42         }
 43 
 44         /// <summary>
 45         /// 添加Session
 46         /// </summary>
 47         /// <param name="strSessionName">Session对象名称</param>
 48         /// <param name="strValue">Session值</param>
 49         /// <param name="iExpires">调动有效期（分钟）</param>
 50         public static void Add(string strSessionName, string strValue, int iExpires)
 51         {
 52             HttpContext.Current.Session[strSessionName] = strValue;
 53             HttpContext.Current.Session.Timeout = iExpires;
 54         }
 55 
 56         /// <summary>
 57         /// 添加Session
 58         /// </summary>
 59         /// <param name="strSessionName">Session对象名称</param>
 60         /// <param name="strValues">Session值数组</param>
 61         /// <param name="iExpires">调动有效期（分钟）</param>
 62         public static void Adds(string strSessionName, string[] strValues, int iExpires)
 63         {
 64             HttpContext.Current.Session[strSessionName] = strValues;
 65             HttpContext.Current.Session.Timeout = iExpires;
 66         }
 67 
 68         /// <summary>
 69         /// 读取某个Session对象值
 70         /// </summary>
 71         /// <param name="strSessionName">Session对象名称</param>
 72         /// <returns>Session对象值</returns>
 73         public static string Get(string strSessionName)
 74         {
 75             if (HttpContext.Current.Session[strSessionName] == null)
 76             {
 77                 return null;
 78             }
 79             else
 80             {
 81                 return HttpContext.Current.Session[strSessionName].ToString();
 82             }
 83         }
 84 
 85         public static void Set<T>(string strSessionName, T value) where T : class , new()
 86         {
 87             HttpContext.Current.Session[strSessionName] = value;
 88             HttpContext.Current.Session.Timeout = 24 * 60;
 89         }
 90 
 91         /// <summary>
 92         /// 读取某个Session对象值
 93         /// </summary>
 94         /// <param name="strSessionName">Session对象名称</param>
 95         /// <returns>Session对象值</returns>
 96         public static T Get<T>(string strSessionName) where T : class , new()
 97         {
 98             if (HttpContext.Current == null || HttpContext.Current.Session == null || HttpContext.Current.Session[strSessionName] == null)
 99             {
100                 return null;
101             }
102             else
103             {
104                 return HttpContext.Current.Session[strSessionName] as T;
105             }
106         }
107 
108         /// <summary>
109         /// 读取某个Session对象值数组
110         /// </summary>
111         /// <param name="strSessionName">Session对象名称</param>
112         /// <returns>Session对象值数组</returns>
113         public static string[] Gets(string strSessionName)
114         {
115             if (HttpContext.Current.Session[strSessionName] == null)
116             {
117                 return null;
118             }
119             else
120             {
121                 return (string[])HttpContext.Current.Session[strSessionName];
122             }
123         }
124 
125         /// <summary>
126         /// 删除某个Session对象
127         /// </summary>
128         /// <param name="strSessionName">Session对象名称</param>
129         public static void Del(string strSessionName)
130         {
131             HttpContext.Current.Session[strSessionName] = null;
132         }
133     }