如何获取表单的屏幕截图

输出活动表单屏幕截图的任何方法？

Answer 1

.NET支持更简单的答案：

Control.DrawToBitmap 。

Answer 2

使用Control.DrawToBitmap（）方法。 例如：

private void timer1_Tick(object sender, EventArgs e) { var frm = Form.ActiveForm; using (var bmp = new Bitmap(frm.Width, frm.Height)) { frm.DrawToBitmap(bmp, new Rectangle(0, 0, bmp.Width, bmp.Height)); bmp.Save(@"c:\temp\screenshot.png"); } } 

Answer 3

试试这个：

 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Drawing.Imaging; namespace ScreenshotCapturer { public partial class Form1 : Form { private static Bitmap bmpScreenshot; private static Graphics gfxScreenshot; public Form1() { InitializeComponent(); } private void btnCapture_Click(object sender, EventArgs e) { // If the user has choosed a path where to save the screenshot if (saveScreenshot.ShowDialog() == DialogResult.OK) { // Hide the form so that it does not appear in the screenshot this.Hide(); // Set the bitmap object to the size of the screen bmpScreenshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb); // Create a graphics object from the bitmap gfxScreenshot = Graphics.FromImage(bmpScreenshot); // Take the screenshot from the upper left corner to the right bottom corner gfxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, Screen.PrimaryScreen.Bounds.Y, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy); // Save the screenshot to the specified path that the user has chosen bmpScreenshot.Save(saveScreenshot.FileName, ImageFormat.Png); // Show the form again this.Show(); } } } } 

Answer 4

这是您可以使用的扩展方法：

  #region Interop [DllImport("user32.dll")] static extern IntPtr SendMessage(IntPtr hWnd, uint msg, IntPtr hdc, PRF_FLAGS drawingOptions); const uint WM_PRINT = 0x317; [Flags] enum PRF_FLAGS : uint { CHECKVISIBLE = 0x01, CHILDREN = 0x02, CLIENT = 0x04, ERASEBKGND = 0x08, NONCLIENT = 0x10, OWNED = 0x20 } #endregion public static Image CaptureImage(this Control control) { Image img = new Bitmap(control.Width, control.Height); using (Graphics g = Graphics.FromImage(img)) { SendMessage( control.Handle, WM_PRINT, g.GetHdc(), PRF_FLAGS.CLIENT | PRF_FLAGS.NONCLIENT | PRF_FLAGS.ERASEBKGND); } return img; } 

Forminheritance自Control ，因此您也可以在表单上使用它。

Answer 5

这会将活动窗口的屏幕截图保存到C：驱动器。

SendKeys.Send("")用于将按键发送到计算机。 在这种情况下， %用于按Alt和{PRTSC}显然按键盘上的Print Screen按钮。

希望这有助于某人！

 private void printScreenButton_Click(object sender, EventArgs e) { SendKeys.Send("%{PRTSC}"); Image img = Clipboard.GetImage(); img.Save(@"C:\\testprintscreen.jpg"); } 

Answer 6

因为Control.DrawToBitmap有一些限制（最值得注意的是以相反的顺序绘制子控件），我已经做了这个替代。 变量_control是要复制的WinForms控件/表单。

 using (Bitmap bitmap = new Bitmap(width, height)) { using (Graphics gb = Graphics.FromImage(bitmap)) using (Graphics gc = Graphics.FromHwnd(_control.Handle)) { IntPtr hdcDest = IntPtr.Zero; IntPtr hdcSrc = IntPtr.Zero; try { hdcDest = gb.GetHdc(); hdcSrc = gc.GetHdc(); BitBlt(hdcDest, 0, 0, width, height, hdcSrc, 0, 0, SRC_COPY); } finally { if (hdcDest != IntPtr.Zero) gb.ReleaseHdc(hdcDest); if (hdcSrc != IntPtr.Zero) gc.ReleaseHdc(hdcSrc); } } bitmap.Save(...); } [DllImport("gdi32.dll", EntryPoint = "BitBlt")] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool BitBlt( [In()] System.IntPtr hdc, int x, int y, int cx, int cy, [In()] System.IntPtr hdcSrc, int x1, int y1, uint rop); private const int SRC_COPY = 0xCC0020; 

Answer 7

  this.Opacity = 0; Rectangle bounds = Screen.GetBounds(Point.Empty); // create the bitmap to copy the screen shot to Bitmap bitmap = new Bitmap(bounds.Width, bounds.Height); // now copy the screen image to the graphics device from the bitmap using (Graphics gr = Graphics.FromImage(bitmap)) { gr.CopyFromScreen(Point.Empty, Point.Empty, bounds.Size); } this.Opacity = 100; 

现在就是

  gr.Save(@"c\pic.jpg",ImageFormat.jpg); 

Answer 8

 here is: public const int SRCCOPY = 0x00CC0020; // BitBlt dwRop parameter [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 bool StretchBlt( IntPtr hdcDest, // handle to destination DC int nXOriginDest, // x-coord of destination upper-left corner int nYOriginDest, // y-coord of destination upper-left corner int nWidthDest, // width of destination rectangle int nHeightDest, // height of destination rectangle IntPtr hdcSrc, // handle to source DC int nXOriginSrc, // x-coord of source upper-left corner int nYOriginSrc, // y-coord of source upper-left corner int nWidthSrc, // width of source rectangle int nHeightSrc, // height of source rectangle int dwRop // raster operation code ); [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); [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); private void run_test() { Rectangle rc = new Rectangle(); Image img = ScreenToImage(ref rc, false); img.Save(@"C:\Users\ssaamm\Desktop\Capt44ure.JPG", System.Drawing.Imaging.ImageFormat.Jpeg); img.Dispose(); } private Image ScreenToImage(ref Rectangle rcDest, bool IsPapaer) { IntPtr handle = this.Handle; //this.Handle // get te hDC of the target window IntPtr hdcSrc = GetWindowDC(handle); // get the size RECT windowRect = new RECT(); GetWindowRect(handle, ref windowRect); int nWidth = windowRect.right - windowRect.left; int nHeight = windowRect.bottom - windowRect.top; if (IsPapaer) { float fRate = (float)rcDest.Width / nWidth; //float fHeight = nHeight * fRate; //rcDest.Height = (int)(nHeight * fRate); //rcDest.Width = (int)(rcDest.Width);// * fRate); rcDest.X = 0; rcDest.Y = 0; rcDest.Height = (int)(nHeight * fRate); //rcDest.Width = (int)(nWidth * fRate); } else { rcDest.X = 0; rcDest.Y = 0; rcDest.Height = nHeight; rcDest.Width = nWidth; } // create a device context we can copy to IntPtr hdcDest = CreateCompatibleDC(hdcSrc); // create a bitmap we can copy it to, // using GetDeviceCaps to get the width/height IntPtr hBitmap = CreateCompatibleBitmap(hdcSrc, rcDest.Width, rcDest.Height); // select the bitmap object IntPtr hOld = SelectObject(hdcDest, hBitmap); // bitblt over StretchBlt(hdcDest, rcDest.X, rcDest.Y, rcDest.Width, rcDest.Height, hdcSrc, 0, 0, nWidth, nHeight, SRCCOPY); // restore selection SelectObject(hdcDest, hOld); // clean up DeleteDC(hdcDest); ReleaseDC(handle, hdcSrc); // get a .NET image object for it Image img = Image.FromHbitmap(hBitmap); // free up the Bitmap object DeleteObject(hBitmap); return img; }