各位老师快帮忙!

[lakerskobe_wuxin]

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;

public partial class CheckCode : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        this.CreateCheckCodeImage(GenerateCheckCode());
    }

    private string GenerateCheckCode()
    {
        int number;
        char code;
        string checkCode = String.Empty;

        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 += code.ToString();
        }

        Response.Cookies.Add(new HttpCookie("CheckCode", checkCode));
        Session["CheckCode"] = checkCode;
        return checkCode;
    }

    private void CreateCheckCodeImage(string checkCode)
    {
        if (checkCode == null || checkCode.Trim() == String.Empty)
        {
            return;
        }

        System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 13.5)), 22);//13.5必须是double型,控制图像宽度,22控制高度
        Graphics g = Graphics.FromImage(image);

        try
        {
            //生成随机生成器
            Random random = new Random();

            ////清空图片背景色
            g.Clear(ColorTranslator.FromHtml("#3F63AD"));

            ////画图片的背景噪音线
            //for (int i = 0; i < 25; 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(ColorTranslator.FromHtml("#3F63AD")), x1, y1, x2, y2);
            //}

            Font font = new System.Drawing.Font("Microsoft Sans Serif", 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));
            System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.White, Color.White, 1.2f, true);
            g.DrawString(checkCode, font, brush, 2, 2);

            //画图片的前景噪音点
            //for (int i = 0; i < 200; i++)
            //{
            //    int x = random.Next(image.Width);
            //    int y = random.Next(image.Height);

            //    image.SetPixel(x, y, Color.FromArgb(random.Next()));
            //}

            //画图片的边框线
            // g.DrawRectangle(new Pen(ColorTranslator.FromHtml("#3F63AD")), 0, 0, image.Width - 1, image.Height - 1);

            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
            Response.ClearContent();
            Response.ContentType = "image/Gif";
            Response.BinaryWrite(ms.ToArray());
        }
        finally
        {
            g.Dispose();
            image.Dispose();
        }
    }
}

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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 Microsoft.ApplicationBlocks.Data;
using System.Data.SqlClient;

public partial class login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        string strSql = "selectLoginUser";
        SqlParameter[] paras ={
            new SqlParameter("@User",SqlDbType.Char,30),
            new SqlParameter("@Psw",SqlDbType.Char,15)};
        if (Session["CheckCode"] != null)
        {
            if (Session["CheckCode"].ToString()==this.tbCode.Text.Trim())
            {
                if (this.tbUser.Text == "" || this.tbPsw.Text == "")
                {
                    Response.Write("<script language=javascript>alert('请输入完整信息!')</script>");
                }
                else
                {
                    string aaa = SqlHelper.ExecuteScalar(SqlHelper.connectionString, CommandType.StoredProcedure, strSql, paras).ToString();
                    int count = int.Parse(aaa);
                    if (count < 0)
                    {
                        Response.Write("<script language=javascript>alert('对不起,您的管理名或是密码有误,请认真填写!')</script>");
                    }
                    if (count > 0)
                    {
                        string sqlcc = "selectsoluUser";
                        string sss = SqlHelper.ExecuteScalar(SqlHelper.connectionString, CommandType.StoredProcedure, sqlcc, paras).ToString();
                        int Audit = int.Parse(sss);
                        if (Audit == 0)
                        {
                            Response.Redirect("waitLogin.aspx");
                        }
                        if (Audit == 1)
                        {
                            Session["Level"] = "work";
                            Response.Redirect("~/Default.aspx");
                        }
                        if (Audit == 2)
                        {
                            Session["Level"] = "Finance";
                            Response.Redirect("~/Default.aspx");
                        }
                    }
                }
            }
            else
            {
                Response.Write("<script language=javascript>alert('验证码错误!')</script>");
            }
        }
    }
}

我在if (Session["CheckCode"].ToString()==this.tbCode.Text.Trim())这句里的不到session的值 总是直接的跳转到验证码错误 谢谢各位了！

[xudaneng]

断点调试一下Session["CheckCode"]是否为空，如果为空说明Session["CheckCode"]没有赋值或者服务端禁用了Session

[biglazy]

应该没有问题啊
没看出哪出错了！

[biglazy]

二楼 那上面一句不是刚刚判断过吗

if (Session["CheckCode"] != null)
。。。。

[cheng_feng001]

跟一下看看Session["CheckCode"]的值应该能发现问题

[lakerskobe_wuxin]

唉 就是因为我跟了 所以才郁闷 session跳到(Session["CheckCode"].ToString()==this.tbCode.Text.Trim())直接就跳到下面 而且我也看了断点的值 根本就没有那个显示的字短 郁闷 真的没有错吗 怎么总是跳到验证码错误那？

[biglazy]

验证码输错了吧？ 呵呵 开个玩笑~

建议再仔细检查下程序！

[wxbps]

你新建一个页面接收下这个Session在Label里面显示出来,看看能不能收到.我出问题都是TRY CATCH一段一段分的,你都写了那么多了,出问题最烦了!

[lakerskobe_wuxin]

好的 我试试看

[GhostAdai]

哇噻，上来就是一大段代码，能不能把几个关键代码段贴出来啊，看着眼晕！自己下断点慢慢跟踪，找出关键点再上来问。

[lakerskobe_wuxin]

OK了 嘿嘿写了