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SessionSession["UserName"] = null;Session.Remove("UserName");