C#程序中session的基本设置示例及清除session的方法

session的基本设置：

using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Web.SessionState;

namespace OAframeWork
{
  public class CSession
  {
      public static object Get(string Key)
    {
      return HttpContext.Current.Session[Key];
    }


  public static string GetString(string Key)
    {
      object obj = HttpContext.Current.Session[Key];
      if (obj == null) return "";
      else return obj.ToString();
    }


    public static object Get(string Key,object DefaultValue)
    {
      if (HttpContext.Current.Session[Key] == null)

 return DefaultValue;
      else
 return HttpContext.Current.Session[Key];

    }


    public static object Get(string Key, object DefaultValue,Boolean CanAdd)
    {
      if (HttpContext.Current.Session[Key] == null)
      {
 if(CanAdd==true)
   HttpContext.Current.Session.Add(Key, DefaultValue);

 return DefaultValue;
      }
      else
 return HttpContext.Current.Session[Key];

    }


    public static Boolean Set(string Key,object Value)
    {
      try
      {
 if (Value == null && HttpContext.Current.Session[Key] != null)
 {
   HttpContext.Current.Session.Remove(Key);
 }
 else if (HttpContext.Current.Session[Key] == null)
   {
     HttpContext.Current.Session.Add(Key, Value);
   }
   else
   {
     HttpContext.Current.Session[Key] = Value;
   }

 return true;
      }
      catch (Exception ex)
      {
 CMsgBox.Show(ex.Message); 
 return false;
      }

    }
 

      
    
  }
}

清除Session：

Session.Abandon();//清除全部Session
//清除某个Session
Session["UserName"] = null;
Session.Remove("UserName");