CommWEB/VerifyImage.ashx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Collections.Generic;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;

namespace CommLeiWeb
{
    /// <summary>
    /// 生成验证码
    /// </summary>
    public class VerifyImage : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";

            VerifyImage v = new VerifyImage();
            context.Response.Cache.SetCacheability(HttpCacheability.NoCache);//如不加，单击验证图片＇看不清换一张＇

            v.Length = this.length;
            v.FontSize = this.fontSize;
            v.Chaos = this.chaos;
            v.BackgroundColor = this.backgroundColor;
            v.ChaosColor = this.chaosColor;
            v.CodeSerial = this.codeSerial;
            v.Colors = this.colors;
            v.Fonts = this.fonts;
            v.Padding = this.padding;
            string code = v.CreateVerifyCode();        //取随机码
            v.CreateImageOnPage(code, context);        // 输出图片

            context.Response.Cookies.Add(new HttpCookie("VerifyCode", code.ToUpper()));// 使用Cookies取验证码的值
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }

        #region 验证码长度(默认6个验证码的长度)
        int length = 4;
        public int Length
        {
            get { return length; }
            set { length = value; }
        }
        #endregion

        #region 验证码字体大小(为了显示扭曲效果，默认40像素，可以自行修改)