checkcode.aspx.cs

用ASP.net开发的一个作业发布系统

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Configuration;
using System.Web;

using System.Web.Security;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class CheckCode : System.Web.UI.Page
{

    
    protected void Page_Load(object sender, EventArgs e)
    {
        

    }
    private string GenerateCheckCode()
    {
        int number;
        char code;
        string CheckCode = string.Empty;

        System.Drawing.Bitmap image=new System.Drawing.Bitmap((int)(Math.Ceiling(CheckCode.Length*12.5)),22);

        System.Random random = new Random();
        for(int i=0;i<5;i++)
        {
            number = random.Next();
            if (number % 2==0)
            {
                code=(char)('0'+(char)(number%10));
            }
            else
                code=(char)('A'+(char)(number%26));
            CheckCode += CheckCode.ToString();
        }
        Response.Cookies.Add(new HttpCookie("CheckCode", CheckCode));

        return CheckCode;
    }
}