命名空间“ <global namespace> '已经包含'Handler'的定义

Question

This HTml Code 此HTml代码

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Capctha Image with Refresh Button</title>
    <script type="text/javascript">
        function RefreshCaptcha() {
            var img = document.getElementById("imgcaptcha");
            img.src = "Handler.ashx?query=" + Math.random();
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <img src="Handler.ashx" id="imgcaptcha" />
    <a href="#" onclick="javascript:RefreshCaptcha();">Refresh</a>
    </form>
</body>
</html>>

Captcha.aspx.cs Captcha.aspx.cs

using System.Drawing;
using System.Drawing.Imaging;

public class Handler : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
        using (Bitmap b = new Bitmap(200, 50, PixelFormat.Format32bppArgb))
        {
            using (Graphics g = Graphics.FromImage(b))
            {
                Rectangle rect = new Rectangle(0, 0, 150, 40);
                g.FillRectangle(Brushes.White, rect);

                //Creating String Draw
                Random r = new Random();
                int StartIndex = r.Next(1, 5);
                int Length = r.Next(5, 15);
                string DrawString = Guid.NewGuid().ToString().Replace("-", "0").Substring(StartIndex, Length);


                //Creating Fount and Bursh
                Font drawFont = new Font("Arial", 16, FontStyle.Italic | FontStyle.Strikeout);

                using (SolidBrush drawBrush = new SolidBrush(Color.Blue))
                {
                    // Create point for upper-left corner of drawing.
                    PointF pointdraw = new PointF(10, 15);
                    // Draw string to screen.
                    g.DrawRectangle(new Pen(Color.Blue, 0), rect);
                    g.DrawString(DrawString, drawFont, drawBrush, pointdraw);
                }

                b.Save(context.Response.OutputStream, ImageFormat.Jpeg);
                context.Response.ContentType = "image/jpeg";
                context.Response.End();
            }
        }
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
    }

I am Getting Erros The namespace '' already contains a definition for 'Handler" like this how Can solve it and Give any idea about error and i am adding handler.ashx 我正在得到Erros命名空间''已经包含了'Handler'的定义，如下所示：如何解决它并给出有关错误的任何想法，我正在添加handler.ashx

Answer 1

Do you get this error upon compile-time or run-time? 在编译时或运行时会收到此错误吗？

This error usually occurs at compile-time and suggests that there is another Page/Handler/UserControl/ServerControl with the class-name Handler . 此错误通常在编译时发生，表明存在另一个具有类名Handler Page / Handler / UserControl / ServerControl。

Also looking at your structure, things are really wired: 还要查看您的结构，事情真的很紧密：

Captcha.aspx holds HTML code (but, I do believe so, points via directive to Captcha.aspx.cs ) Captcha.aspx保存HTML代码（但是，我确实相信，通过指令指向Captcha.aspx.cs ）
Captcha.aspx.cs holds the class Handler (which implements System.Web.IHttpHandler but rather should be a System.Web.UI.Page ) Captcha.aspx.cs拥有Handler类（它实现System.Web.IHttpHandler ，而应该是System.Web.UI.Page ）

Summing it up: I believe there's a flaw with the referencing. 总结：我相信引用存在缺陷。 The content of Captcha.aspx.cs is wrong and possibly a duplicate of a Handler.ashx.cs -file ... Captcha.aspx.cs的内容错误，并且可能是Handler.ashx.cs -file的重复...

命名空间“ <global namespace> '已经包含'Handler'的定义

问题描述

1 个解决方案

解决方案1
0 2014-05-02 11:10:41

命名空间“ <global namespace> &#39;已经包含&#39;Handler&#39;的定义

问题描述

1 个解决方案

解决方案1 0 2014-05-02 11:10:41

命名空间“ <global namespace> '已经包含'Handler'的定义

解决方案1
0 2014-05-02 11:10:41