public class Session_Manager
{
/// <summary>
/// 获取Session对象值
/// </summary>
/// <param name="Key"></param>
/// <returns></returns>
public static object Get(string Key)
{
return HttpContext.Current.Session[Key];
}
/// <summary>
/// 获取Session对象值
/// </summary>
/// <param name="Key">Session对象名称</param>
/// <returns></returns>
public static string GetString(string Key)
{
object obj = HttpContext.Current.Session[Key];
if (obj == null) return "";
else return obj.ToString();
}
/// <summary>
/// 获取Session对象值（当缓存为空时取默认值）
/// </summary>
/// <param name="Key">Session对象名称</param>
/// <param name="DefaultValue">默认值</param>
/// <returns></returns>
public static object Get(string Key, object DefaultValue)
{
if (HttpContext.Current.Session[Key] == null)
return DefaultValue;
else
return HttpContext.Current.Session[Key];
}
/// <summary>
/// Session对象值
/// </summary>
/// <param name="Key">Session对象名称</param>
/// <param name="DefaultValue">默认缓存值</param>
/// <param name="CanAdd">是否取默认缓存值（true,false）</param>
/// <returns></returns>
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];
}
/// <summary>
/// 添加Session默认有效期
/// </summary>
/// <param name="Key">Session对象名称</param>
/// <param name="Value">Session值</param>
/// <returns></returns>
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)
{
return false;
}
}
#region 添加Session，并调整有效期为分钟或几年
/// <summary>
/// 添加Session，并调整有效期为分钟或几年
/// </summary>
/// <param name="Key">Session对象名称</param>
/// <param name="objValue">Session值</param>
/// <param name="MinuteCount">分钟数：大于０则以分钟数为有效期，等于０则以后面的年为有效期</param>
/// <param name="Yearcount">年数：当分钟数为０时按年数为有效期，当分钟数大于０时此参数随意设置</param>
public static void Set(string Key, object objValue, int MinuteCount, int Yearcount)
{
HttpContext.Current.Session[Key] = objValue;
if (MinuteCount> 0)
{
HttpContext.Current.Session.Timeout = MinuteCount;
}
else if (Yearcount> 0)
{
HttpContext.Current.Session.Timeout = 60 * 24 * 365 * Yearcount;
}
}
/// <summary>
/// 删除某个Session对象
/// </summary>
/// <param name="key">Session对象名称</param>
public static void Remove(string key)
{
HttpContext.Current.Session.Remove(key);
}
}
原文地址：https://www.cnblogs.com/dulang/p/9284903.html