单击按钮进入无限循环 (ASP.Net)

Question

我正在从特定路径拍摄图像并在其上应用颜色，然后我想保存图像并在单击按钮时将其显示回来。但是那个点击事件进入了无限循环。

它不会导致循环一段时间，但如果你运行投射不止一个 time and place debugger 然后你会发现它正在循环。

下面是我的代码：

aspx代码：

    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Convert.aspx.cs" Inherits="ConvertImage.Convert" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">

        <div>
            <div>
                <asp:Button ID="Button1" runat="server" Text="Submit" OnClick="Button1_Click1" />
                <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
            </div>
            <div>
                <asp:Image ID="OldImage" ImageUrl="~/Image/Panda.jpg" runat="server" />
                <asp:Image ID="NewImage" runat="server" />
            </div>
        </div>

    </form>
</body>
</html>

c#代码：

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using static System.Net.Mime.MediaTypeNames;

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

        }



        protected void Button1_Click1(object sender, EventArgs e)
        {
            CompareImage();
        }



        private void CompareImage()
        {
            Bitmap image1;
            try
            {
                image1 = new Bitmap(Server.MapPath(@"~\Image\Panda.jpg"), true);
                OldImage.ImageUrl = "~/Image/Panda.jpg";
                int x, y;


                for (x = 0; x < image1.Width; x++)
                {
                    for (y = 0; y < image1.Height; y++)
                    {
                        if (y < 150)
                        {
                            Color pixelColor = image1.GetPixel(x, y);
                            Color newColor = Color.FromArgb(pixelColor.R, 25, 60);
                            image1.SetPixel(x, y, newColor);
                        }
                        else if (y >= 150 && y < 300)
                        {
                            Color pixelColor = image1.GetPixel(x, y);
                            Color newColor = Color.FromArgb(pixelColor.R, 200, 100);
                            image1.SetPixel(x, y, newColor);
                        }
                        else
                        {

                            Color pixelColor = image1.GetPixel(x, y);
                            Color newColor = Color.FromArgb(pixelColor.R, 100, 210);
                            image1.SetPixel(x, y, newColor);

                        }
                    }
                }


                image1.Save(Server.MapPath(@"~\Image\xyz.jpg"), ImageFormat.Jpeg);
                NewImage.ImageUrl = @"~/Image/xyz.jpg";
                Label1.Text = "Pixel format: " + image1.PixelFormat.ToString();



            }
            catch (Exception ex)
            {
                Response.Write(ex.Message);
            }
        }

    }
}

哪里不对请大家帮帮我

Answer 1

尝试调用 Debug.Writeline(image1.height) 和 image1.width。还要添加断点并单步执行循环。很难说循环将无限延伸到哪里。对我来说，循环中的一切看起来都很好，它不应该是无限的。

Post 返回 Debug.Writeline 的结果，以便我们可以帮助您或通过断点或 Debug.WRiteline

帮助您完成调试过程

也尝试运行在不同的图像上 and/or 确认图像的路径

就像我说的你的代码很好，这要么是路径问题，但似乎不是因为你得到了正确的宽度和高度，或者很可能是身份验证问题。我运行你的代码使用这张图片

并且我能够将此图像作为输出

确认这是否是正确的输出。

您可以尝试的另一件事是改变

image1.Save(Server.MapPath(@"~\Image\xyz.jpg"), ImageFormat.Jpeg);

至

image1.Save(AppDomain.CurrentDomain.BaseDirectory + "Image/xyz.jpg", ImageFormat.Jpeg);

我的最终代码

Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
     <form id="form1" runat="server">

        <div>
            <div>
                <asp:Button ID="Button1" runat="server" Text="Submit" OnClick="Button1_Click" />
                <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
            </div>
            <div>
                <asp:Image ID="OldImage" ImageUrl="~/Image/Panda.jpg" runat="server" />
                <asp:Image ID="NewImage" runat="server" />
            </div>
        </div>

    </form>
</body>
</html>

Default.aspx.cs

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

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

    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        CompareImage();
    }

    private void CompareImage()
    {
        Bitmap image1;
        try
        {
            image1 = new Bitmap(Server.MapPath(@"~\Image\Panda.jpg"), true);
            OldImage.ImageUrl = "~/Image/Panda.jpg";
            int x, y;


            for (x = 0; x < image1.Width; x++)
            {
                for (y = 0; y < image1.Height; y++)
                {
                    if (y < 150)
                    {
                        Color pixelColor = image1.GetPixel(x, y);
                        Color newColor = Color.FromArgb(pixelColor.R, 25, 60);
                        image1.SetPixel(x, y, newColor);
                    }
                    else if (y >= 150 && y < 300)
                    {
                        Color pixelColor = image1.GetPixel(x, y);
                        Color newColor = Color.FromArgb(pixelColor.R, 200, 100);
                        image1.SetPixel(x, y, newColor);
                    }
                    else
                    {

                        Color pixelColor = image1.GetPixel(x, y);
                        Color newColor = Color.FromArgb(pixelColor.R, 100, 210);
                        image1.SetPixel(x, y, newColor);

                    }
                }
            }


            //image1.Save(Server.MapPath(@"~\Image\xyz.jpg"), ImageFormat.Jpeg);
            image1.Save(AppDomain.CurrentDomain.BaseDirectory + "Image/xyz.jpg", ImageFormat.Jpeg);
            NewImage.ImageUrl = @"~/Image/xyz.jpg";
            Label1.Text = "Pixel format: " + image1.PixelFormat.ToString();



        }
        catch (Exception ex)
        {
            Response.Write(ex.Message);
        }
    }

}

项目树

这对我来说就像魅力一样。祝你好运。

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