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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="CodeImg.aspx.cs" Inherits="Purdue.CRM.Web.inc.CodeImg" %>

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 using System;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
namespace Purdue.CRM.Web.inc
{
public partial class CodeImg : System.Web.UI.Page
{
public static String realCode="";
protected void Page_Load(object sender, EventArgs e)
{
//µ÷Óú¯Êý½«ÑéÖ¤ÂëÉú³ÉͼƬ
this.CreateCheckCodeImage(GenerateCheckCode());
}
private string GenerateCheckCode()
{
//²úÉúËÄλµÄËæ»ú×Ö·û´®
int number;
char code;
string checkCode = String.Empty;
System.Random random = new Random();
for (int i = 0; i < 4; i++)
{
number = random.Next();
code = (char)('0' + (char)(number % 10));
checkCode += code.ToString();


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