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          CookiesHelper.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
namespace TLibrary.ObjectHelper
{
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    {
        #region »ñÈ¡Cookie
        /// <summary>
        /// »ñµÃCookieµÄÖµ
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        /// <param name="cookieName"></param>
        /// <returns></returns>
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private void Page_Load(object sender, System.EventArgs e)
{
string checkCode = CreateRandomCode(4);
Session["CheckCode"] = checkCode;
CreateImage(checkCode);
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string mapho = request["imgpath"];//»ñȡij¸öÒ³Ãæ´«¹ýµÄͼƬÃû³Æ
  string str1 = Server.MapPath(mapho);//ÒªÌí¼ÓˮӡµÄͼƬ
  string str2 = Server.MapPath("WaterMark.jpg");//Ìí¼ÓµÄÄÚÈÝͼƬ
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