生成图片的问题

Question

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Bitmap image = new Bitmap(100, 50);
        Graphics graphics = Graphics.FromImage(image);
        graphics.Clear(Color.Black);
        Font font = new Font("宋体", 16);
        Brush brush = new SolidBrush(Color.White);
        graphics.DrawString("多少", font, brush, 0, 0);
        graphics.Dispose();
        Response.Clear();
        Response.ContentType = "image/pjepg";
        image.Save(Response.OutputStream, ImageFormat.Jpeg);
        image.Dispose();
        Response.End();
    }
} 
运行之后出现： 
无法显示 XML 页。 
使用 样式表无法查看 XML 输入。请更正错误然后单击 刷新按钮，或以后重试。 
--------------------------------------------------------------------------------文本内容中发现无效字符。处理资源 'http://localhost:1788/WebSite6/Default.aspx' 时出错。 
这个是什么意思啊

Answer 1

image/pjpeg  //这个都写错了！

Answer 2

恩 可以了  但是怎么实现点击图片 更换验证码呢  <img onclick= />  怎么写

Answer 3

<script language="javascript">  
function change()  
{  
var img =document.getElementById("ImageButton1");  
img.src=img.src+"?";  
}  
</script>  
<a href="javascript:change();">看不清,换一张 </a>  <img alt="" src="" style="cursor:pointer;" id="codeimg" onclick="this.src='validate.aspx?time=' + Math.random();" /> <script language="javascript" type="text/javascript">document.getElementById('codeimg').src = 'validate.aspx?time=' + Math.random(); </script>  

Answer 4

if (Request.QueryString["str"] == null || Request.QueryString["str"].ToString() == "")
        {
            checkCode = " ";
        }
        else
        {            checkCode = Server.UrlDecode(Request.QueryString["str"].ToString() == "" ? "" : Request.QueryString["str"].ToString);
        }
        Bitmap image = new Bitmap((int)Math.Ceiling((100.00)), 22);
        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(Color.White);
            //Font font = new System.Drawing.Font("宋体", 10, (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.Black, Color.Black,90, true);
            //g.DrawString(checkCode, font, brush, 2, 2);
            g.FillRectangle(new System.Drawing.SolidBrush(Color.Black), 0, 0, image.Width, 20);
            g.Clear(Color.White);
            g.DrawString(checkCode, new Font("宋体", 10, FontStyle.Bold), Brushes.Black, new PointF(5, 5));
            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();
        }

Answer 5

  <img src="Default.aspx"  onclick="this.src='Default.aspx?time=' + Math.random();"  />  就可以了  纠结

Answer 6

 <img src="Default.aspx"   style="cursor:hand" onclick="this.src='Default.aspx?time=' + Math.random();"  />