屏幕截图带有网格到其他Windows窗体的图片框 [英] Screenshot Picturebox with Grid to other Windows Form

问题描述

大家好，

有没有办法截取第三个图片框？

is there a way to take screenshot of the 3rd picturebox?

我想将彩色网格复制到另一个窗体

I'd like to copy the colored grid to another windows form

推荐答案

您好，

以下
GitHub存储库有一个类来处理截图并返回位图。使用PictureBox的句柄调用Capture并将其传递给Capture。请注意下面的代码我将Capture的修饰符从private更改为public。将
类的命名空间更改为您的命名空间。

The following GitHub repository has a class to handle taking screenshots and return a bitmap. Call Capture with the handle of PictureBox and pass it to Capture. Note in the code below I changed the modifier of Capture from private to public. Change the namespace of the class to your namespace.

using System;
using System.Drawing;
using System.Runtime.InteropServices;

namespace BaseLibrary.SupportClasses
{
    public class ScreenCapture
    {
        [DllImport("user32.dll")]
        private static extern IntPtr GetForegroundWindow();

        [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
        public static extern IntPtr GetDesktopWindow();

        [StructLayout(LayoutKind.Sequential)]
        private struct Rect
        {
            public int Left;
            public int Top;
            public int Right;
            public int Bottom;
        }

        [DllImport("user32.dll")]
        private static extern IntPtr GetWindowRect(IntPtr hWnd, ref Rect rect);

        public static Image CaptureFullscreen()
        {
            return Capture(GetDesktopWindow());
        }

        public static Bitmap CaptureCurrentWindow()
        {
            return Capture(GetForegroundWindow());
        }
        public static Bitmap Capture(IntPtr handle)
        {
            var rect = new Rect();
            GetWindowRect(handle, ref rect);

            var bounds = new Rectangle(
                rect.Left, rect.Top, rect.Right - rect.Left, 
                rect.Bottom - rect.Top);

            var result = new Bitmap(bounds.Width, bounds.Height);

            using (var graphics = Graphics.FromImage(result))
            {
                graphics.CopyFromScreen(
                    new Point(bounds.Left, bounds.Top), 
                    Point.Empty, bounds.Size);
            }

            return result;
        }
    }
}

调用它 

var imageBitmap = ScreenCapture.Capture(pictureBox1.Handle);

对于另一个表单，创建一个重载的构造函数，它将Bitmap传递给私有变量，然后在表单加载时分配BitMap到PictureBox。

For the other form, create a overloaded constructor which passes the Bitmap in to a private variable then on form load assign the BitMap to the PictureBox.

这篇关于屏幕截图带有网格到其他Windows窗体的图片框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！