C#操作session的类实例(转)

using System.Web;
namespace DotNet.Utilities
{
 public static class SessionHelper2
 {
  /// <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 = 20;
  }
  /// <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 = 20;
  }
  /// <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();
   }
  }
  /// <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;
  }
 }
}