备用代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Security;
using System.Web;
using System.Web.UI;
using CSharpLib.Entity;
using System.IO;
using System.Web.Script.Serialization;


namespace CSharpLib.Common
{
    public class Utility
    {
        public static string Substring(string text, int index)
        {
            return text.Length > index ? text.Substring(0, index) + "..." : text;
        }

        public static WebSiteEntities OpenConnect()
        {
            return new WebSiteEntities();
        }

        public static string Substring(string text, int index, string strEnding)
        {
            return text.Length > index ? text.Substring(0, index) + strEnding : text;
        }

        public static void MessageShow(Page pInstance, string msg)
        {
            ClientScriptManager csm = pInstance.ClientScript;

            csm.RegisterStartupScript(pInstance.GetType(), "message", "<script language='javascript' defer>alert('" + msg.ToString() + "');</script>");
        }

        public static void MessageShowUrl(Page pInstance, string strMessage, string strFileName)
        {

            ClientScriptManager csm = pInstance.ClientScript;

            string strContent = string.Format("<script language=javascript>alert('{0}');window.location.replace('{1}')</script>", strMessage, strFileName);

            csm.RegisterStartupScript(pInstance.GetType(), "message", strContent);
        }

        public static string GetClientIP()
        {
            string result = String.Empty;

            result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
            if (null == result || result == String.Empty)
            {
                result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
            }

            if (null == result || result == String.Empty)
            {
                result = HttpContext.Current.Request.UserHostAddress;
            }

            if (null == result || result == String.Empty)
            {
                return "0.0.0.0";
            }

            return result;
        }

        public static string EncryptPassword(string strPassword)
        {
            return FormsAuthentication.HashPasswordForStoringInConfigFile(strPassword, "sha1").Substring(0, 32).ToString();
        }


        public static string JsonSerializer(object obj)
        {
            JavaScriptSerializer json = new JavaScriptSerializer();

            return json.Serialize(obj);
        }

        public static void SendJson(string data)
        {
            HttpContext.Current.Response.Write(data);

            HttpContext.Current.Response.End();
        }

        //public static ICacheManager GetCacheNode()
        //{
        //    return CacheFactory.GetCacheManager();
        //}
    }
}