iis6 단순 랜덤 코드 예

27337 단어

랜덤 코드가 win2003iis6 서버에 표시되지 않는 것을 해결합니다


 

랜덤 코드 보이기:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="login.aspx.cs" Inherits="TestDemo.login" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
     <script language="javascript" type="text/javascript">
         function ChangeCode()
         {
       
             var date = new Date();
             var myImg = document.getElementById("ImageCheck");          
             var GUID = document.getElementById("lblGUID");  
            
             if(GUID != null)
             {
                 if(GUID.innerHTML != "" && GUID.innerHTML != null)
                 {
                     myImg.src = "Vcode.aspx?GUID="+GUID.innerHTML+"&flag="+date.getMilliseconds()
                  
                 }
             }
             return false;
         }
         </script>
</head>
<body>
    <form id="form1" runat="server" method="post" >
    <div>
        <asp:Label ID="lblGUID" runat="server" Style="display: none"></asp:Label>
     <a id="A2" href="" onclick="ChangeCode();return false;">
          <asp:Image ID="ImageCheck" runat="server" ImageUrl="../Vcode.aspx?GUID=GUID"
           ImageAlign="AbsMiddle" ToolTip=" , "></asp:Image></a>
    </div>
    </form>
</body>
</html>

 
//이벤트 로드
protected void Page_Load(object sender, EventArgs e)
        {
            if (!this.IsPostBack)
            {
                this.ViewState["GUID"] = System.Guid.NewGuid().ToString();
                this.lblGUID.Text = this.ViewState["GUID"].ToString();
            }
        }

 

// 랜덤 코드 페이지


빈 페이지

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Vcode.aspx.cs" Inherits="TestDemo.Vcode" %>

 

백그라운드

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace TestDemo
{
    public partial class Vcode : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            string checkCode = GetRandomCode(4);
            Session["CheckCode"] = checkCode;
            SetPageNoCache();
            CreateImage(checkCode);
        }


        /// <summary>
        ///  
        /// </summary>
        private void SetPageNoCache()
        {
            Response.Buffer = true;
            Response.ExpiresAbsolute = System.DateTime.Now.AddSeconds(-1);
            Response.Expires = 0;
            Response.CacheControl = "no-cache";
            Response.AppendHeader("Pragma", "No-Cache");
        }

        private string CreateRandomCode(int codeCount)
        {
            string allChar = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,i,J,K,M,N,P,Q,R,S,T,U,W,X,Y,Z";
            string[] allCharArray = allChar.Split(',');
            string randomCode = "";
            int temp = -1;

            Random rand = new Random();
            for (int i = 0; i < codeCount; i++)
            {
                if (temp != -1)
                {
                    rand = new Random(i * temp * ((int)DateTime.Now.Ticks));
                }
                int t = rand.Next(35);
                if (temp == t)
                {
                    return CreateRandomCode(codeCount);// 
                }
                temp = t;
                randomCode += allCharArray[t];
            }
            return randomCode;
        }
        private string GetRandomCode(int CodeCount)
        {
            string allChar = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,i,J,K,M,N,P,Q,R,S,T,U,W,X,Y,Z";
            string[] allCharArray = allChar.Split(',');
            string RandomCode = "";
            int temp = -1;

            Random rand = new Random();
            for (int i = 0; i < CodeCount; i++)
            {
                if (temp != -1)
                {
                    rand = new Random(temp * i * ((int)DateTime.Now.Ticks));
                }

                int t = rand.Next(33);

                while (temp == t)
                {
                    t = rand.Next(33);
                }

                temp = t;
                RandomCode += allCharArray[t];
            }

            return RandomCode;
        }
        private void CreateImage(string checkCode)
        {
            int iwidth = (int)(checkCode.Length * 14);
            System.Drawing.Bitmap image = new System.Drawing.Bitmap(iwidth, 20);
            Graphics g = Graphics.FromImage(image);
            Font f = new System.Drawing.Font("Arial ", 10);//, System.Drawing.FontStyle.Bold);
            Brush b = new System.Drawing.SolidBrush(Color.Black);
            Brush r = new System.Drawing.SolidBrush(Color.FromArgb(166, 8, 8));

            //g.FillRectangle(new System.Drawing.SolidBrush(Color.Blue),0,0,image.Width, image.Height);
            //            g.Clear(Color.AliceBlue);// 
            g.Clear(System.Drawing.ColorTranslator.FromHtml("#99C1CB"));// 

            char[] ch = checkCode.ToCharArray();
            for (int i = 0; i < ch.Length; i++)
            {
                if (ch[i] >= '0' && ch[i] <= '9')
                {
                    // 
                    g.DrawString(ch[i].ToString(), f, r, 3 + (i * 12), 3);
                }
                else
                {   // 
                    g.DrawString(ch[i].ToString(), f, b, 3 + (i * 12), 3);
                }
            }

            //for 
            //            Pen blackPen = new Pen(Color.Black, 0);
            //            Random rand = new Random();
            //            for (int i=0;i<5;i++)
            //            {
            //                int y = rand.Next(image.Height);
            //                g.DrawLine(blackPen,0,y,image.Width,y);
            //            }

            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
            //history back  
            Response.Cache.SetNoStore();//          
            Response.ClearContent();
            Response.ContentType = "image/Jpeg";
            Response.BinaryWrite(ms.ToArray());
            g.Dispose();
            image.Dispose();
        }        
    }
}

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