C#语法糖之 session操作类 asp.net

//声名一个数据集合
var listString = new List<string>() { "a", "b", "c" };
//session key
string key = "sekey";

//获取实例
var sessionManager = SessionManager<List<string>>.GetInstance();

//添加session
sessionManager.Add(key, listString);
//add有其它重载 上面是最基本的

//获取
List<string> sessionList = sessionManager[key];

//其它方法
sessionManager.ContainsKey(key);

sessionManager.Remove(key);//删除

sessionManager.RemoveAll(c => c.Contains("sales_"));//删除key包含sales_的session

sessionManager.GetAllKey();//获取所有key

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

namespace SyntacticSugar
{
/// <summary>
/// ** 描述：session操作类
/// ** 创始时间：2015-6-9
/// ** 修改时间：-
/// ** 作者：sunkaixuan
/// ** 使用说明：
/// </summary>
/// <typeparam name="K">键</typeparam>
/// <typeparam name="V">值</typeparam>
public class SessionManager<V> : IHttpStorageObject<V>
{
private static readonly object _instancelock = new object();
private static SessionManager<V> _instance = null;

public static SessionManager<V> GetInstance()
{
if (_instance == null)
{
lock (_instancelock)
{
if (_instance == null)
{
_instance = new SessionManager<V>();
}
}

}
return _instance;
}

public override void Add(string key, V value)
{
context.Session.Add(key, value);
}

public override bool ContainsKey(string key)
{
return context.Session[key] != null;
}

public override V Get(string key)
{
return (V)context.Session[key];
}

public override IEnumerable<string> GetAllKey()
{
foreach (var key in context.Session.Keys)
{
yield return key.ToString();
}
}

public override void Remove(string key)
{
context.Session[key] = null;
context.Session.Remove(key);
}

public override void RemoveAll()
{
foreach (var key in GetAllKey())
{
Remove(key);
}
}

public override void RemoveAll(Func<string, bool> removeExpression)
{
var allKeyList = GetAllKey().ToList();
var removeKeyList = allKeyList.Where(removeExpression).ToList();
foreach (var key in removeKeyList)
{
Remove(key);
}
}

public override V this[string key]
{
get { return (V)context.Session[key]; }
}
}
}

using System;
namespace SyntacticSugar
{
public abstract class IHttpStorageObject<V>
{

public int Minutes = 60;
public int Hour = 60 * 60;
public int Day = 60 * 60 * 24;
public System.Web.HttpContext context = System.Web.HttpContext.Current;
public abstract void Add(string key, V value);
public abstract bool ContainsKey(string key);
public abstract V Get(string key);
public abstract global::System.Collections.Generic.IEnumerable<string> GetAllKey();
public abstract void Remove(string key);
public abstract void RemoveAll();
public abstract void RemoveAll(Func<string, bool> removeExpression);
public abstract V this[string key] { get; }
}
}