如何将 Outlook 窗体区域捕获为图像？ VSTO Outlook 插件

Question

我想在 Outlook 中保存已完成表单的图像。我正在使用 VSTO Outlook 插件。我能够捕获全屏图像，但我对表单区域本身没有运气。有人有什么想法吗？

       var bmpScreenshot = new Bitmap(this.Width,
                      this.Height,
                       System.Drawing.Imaging.PixelFormat.Format32bppArgb);

        var grxScreenshot = Graphics.FromImage(bmpScreenshot);

        grxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X,
                    Screen.PrimaryScreen.Bounds.Y,
                    0,
                    0,
                    Screen.PrimaryScreen.Bounds.Size,
                    CopyPixelOperation.SourceCopy);


        string outputFileName = @"C:\Users\63530\Desktop\image.png";
        using (MemoryStream memory = new MemoryStream())
        {
            using (FileStream fs = new FileStream(outputFileName, FileMode.Create, FileAccess.ReadWrite))
            {
                bmpScreenshot.Save(memory, ImageFormat.Png);
                byte[] bytes = memory.ToArray();
                fs.Write(bytes, 0, bytes.Length);
            }
        }

Answer 1

这就是我捕获任何窗口内容的方式。希望对您有所帮助，但不清楚您要捕获的this 是什么。即使窗口不在前台，此代码也可以工作。

    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool GetWindowRect(IntPtr hWnd, ref RECT lpRect);

    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool PrintWindow(IntPtr hWnd, IntPtr hdcBlt, int nFlags);

    public static Bitmap GetSnapshot(IntPtr hWnd) // capture a window by its handle
    {
        Int32 windowLeft;
        Int32 windowTop;
        Int32 windowWidth;
        Int32 windowHeight;
        if (hWnd == IntPtr.Zero) return null;
        if (!GetWindowRect(hWnd, out windowLeft, out windowTop, out windowWidth, out windowHeight)) return null;

        Bitmap bmp = new Bitmap(windowWidth, windowHeight, PixelFormat.Format32bppArgb);
        Graphics gfxBmp = Graphics.FromImage(bmp);
        IntPtr hdcBitmap = gfxBmp.GetHdc();

        PrintWindow(hWnd, hdcBitmap, 0); // from user32.dll

        gfxBmp.ReleaseHdc(hdcBitmap);
        gfxBmp.Dispose();

        return bmp;
    }

    private static bool GetWindowRect(IntPtr hWnd, out Int32 left, out Int32 top, out Int32 width, out Int32 height)
    {
        left = 0;
        top = 0;
        width = 0;
        height = 0;

        RECT rct = new RECT();
        if (!GetWindowRect(hWnd, ref rct)) return false; // from user32.dll

        left = rct.Left;
        top = rct.Top;
        width = rct.Right - rct.Left + 1;
        height = rct.Bottom - rct.Top + 1;
        return true;
    }

    public struct RECT
    {
        public Int32 Left;
        public Int32 Top;
        public Int32 Right;
        public Int32 Bottom;
    }