微信摇一摇红包源码/51wsb_weiyao/admin/CreateImage.aspx.cs

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using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace wxyaoyao.admin
{
    public partial class CreateImage : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            string checkCode = CreateCode(4);

            //用于验证
            Session["CheckCode"] = checkCode;
            CreateImages(checkCode);
        }

        /*产生验证码*/
        public string CreateCode(int codeLength)
        {

            string so = "1,2,3,4,5,6,7,8,9,0";//,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";
            string[] strArr = so.Split(',');
            string code = "";
            Random rand = new Random();
            for (int i = 0; i < codeLength; i++)
            {
                code += strArr[rand.Next(0, strArr.Length)];
            }
            return code;
        }

        /*产生验证图片*/
        public void CreateImages(string code)
        {

            Bitmap image = new Bitmap(60, 20);
            Graphics g = Graphics.FromImage(image);
            WebColorConverter ww = new WebColorConverter();
            g.Clear((Color)ww.ConvertFromString("#FAE264"));

            Random random = new Random();
            //画图片的背景噪音线
            for (int i = 0; i < 12; i++)
            {
                int x1 = random.Next(image.Width);
                int x2 = random.Next(image.Width);
                int y1 = random.Next(image.Height);
                int y2 = random.Next(image.Height);

                g.DrawLine(new Pen(Color.LightGray), x1, y1, x2, y2);
            }
            Font font = new Font("Arial", 15, FontStyle.Bold | FontStyle.Italic);