check.aspx.cs

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

namespace novel
{
    public partial class check : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            #region 生成验证码
            if (Session.Contents["validate"] == null)
                Session.Add("validate", null);
            Random rand = new Random();
            string vaildate = rand.Next(1000, 10000).ToString();
            Session.Contents["validate"] = vaildate;
            System.Drawing.Image image = new System.Drawing.Bitmap(30, 16);
            System.Drawing.Graphics formGraphice = System.Drawing.Graphics.FromImage(image);
            System.Drawing.Font font = new System.Drawing.Font("Arial", 10, FontStyle.Regular);
            System.Drawing.SolidBrush brush = new System.Drawing.SolidBrush(System.Drawing.Color.Black);
            formGraphice.Clear(System.Drawing.Color.White);
            System.Drawing.StringFormat format = new System.Drawing.StringFormat();
            formGraphice.DrawString(vaildate, font, brush, 0, 00, format);
            font.Dispose();
            brush.Dispose();
            formGraphice.Dispose();
            image.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
            #endregion
        }
    }
}