zoukankan      html  css  js  c++  java
  • winform 指定控件区域截图(比如截取窗体中的某个Panel区域)

        /// <summary>  
        /// 辅助类 定义Gdi32 API函数  
        /// </summary>  
        public class GDI32
        {
            public const int SRCCOPY = 0x00CC0020;
            [DllImport("gdi32.dll")]
            public static extern bool BitBlt(IntPtr hObject, int nXDest, int nYDest, int nWidth,
                            int nHeight, IntPtr hObjectSource, int nXSrc, int nYSrc, int dwRop);
            [DllImport("gdi32.dll")]
            public static extern IntPtr CreateCompatibleBitmap(IntPtr hDC, int nWidth, int nHeight);
            [DllImport("gdi32.dll")]
            public static extern IntPtr CreateCompatibleDC(IntPtr hDC);
            [DllImport("gdi32.dll")]
            public static extern bool DeleteDC(IntPtr hDC);
            [DllImport("gdi32.dll")]
            public static extern bool DeleteObject(IntPtr hObject);
            [DllImport("gdi32.dll")]
            public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);
        }
    
        /// <summary>  
        /// 辅助类 定义User32 API函数  
        /// </summary>  
        public class User32
        {
            [StructLayout(LayoutKind.Sequential)]
            public struct RECT
            {
                public int left;
                public int top;
                public int right;
                public int bottom;
            }
            [DllImport("user32.dll")]
            public static extern IntPtr GetDesktopWindow();
            [DllImport("user32.dll")]
            public static extern IntPtr GetWindowDC(IntPtr hWnd);
            [DllImport("user32.dll")]
            public static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDC);
            [DllImport("user32.dll")]
            public static extern IntPtr GetWindowRect(IntPtr hWnd, ref RECT rect);
        }
    
    
    
    调用:(传入控件句柄即可)
            public Image CaptureWindow(IntPtr handle)
            {
                IntPtr hdcSrc = User32.GetWindowDC(handle);
                User32.RECT windowRect = new User32.RECT();
                User32.GetWindowRect(handle, ref windowRect);
                int width = windowRect.right - windowRect.left;
                int height = windowRect.bottom - windowRect.top;
                IntPtr hdcDest = GDI32.CreateCompatibleDC(hdcSrc);
                IntPtr hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc, width, height);
                IntPtr hOld = GDI32.SelectObject(hdcDest, hBitmap);
                GDI32.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, 0, 0, GDI32.SRCCOPY);
                GDI32.SelectObject(hdcDest, hOld);
                GDI32.DeleteDC(hdcDest);
                User32.ReleaseDC(handle, hdcSrc);
                Image img = Image.FromHbitmap(hBitmap);
                GDI32.DeleteObject(hBitmap);
                return img;
            }
    

      

  • 相关阅读:
    uva 11248 最大流 ISAP
    【力扣】133. 克隆图
    【力扣】125. 验证回文串
    【力扣】130. 被围绕的区域
    【力扣】337. 打家劫舍 III
    【力扣】104. 二叉树的最大深度-及二叉树的遍历方式
    【力扣】392. 判断子序列
    【力扣】95. 不同的二叉搜索树 II
    【力扣】120. 三角形最小路径和
    【力扣】两个数组的交集 II
  • 原文地址:https://www.cnblogs.com/Eric-Hwang/p/4250704.html
Copyright © 2011-2022 走看看