从 WPF 的 WebBrowser 控件保存图像 - 你是怎么做的？答案

【问题标题】：Saving an Image from WPF's WebBrowser control - how do you do it?从 WPF 的 WebBrowser 控件保存图像 - 你是怎么做的？
【发布时间】：2010-04-29 06:32:31
【问题描述】：

每个人。可能有一个简单的解决方案，但我似乎找不到。我正在使用 Visual Studio 2010 附带的 WPF 中的 WebBrowser 控件，并尝试以编程方式将可能出现在网页上的图像保存到磁盘。

提前非常感谢！运气

【问题讨论】：

标签： wpf wpf-controls

【解决方案1】：

添加System.Drawing作为参考，并在应该捕获图像的方法中执行以下操作：

Rect bounds = VisualTreeHelper.GetDescendantBounds(browser1);

System.Windows.Point p0 = browser1.PointToScreen(bounds.TopLeft);
System.Drawing.Point p1 = new System.Drawing.Point((int)p0.X, (int)p0.Y);

Bitmap image = new Bitmap((int)bounds.Width, (int)bounds.Height);
Graphics imgGraphics = Graphics.FromImage(image);

imgGraphics.CopyFromScreen(p1.X, p1.Y,
                           0, 0,
                           new System.Drawing.Size((int)bounds.Width,
                                                        (int)bounds.Height));

image.Save("C:\\a.bmp", ImageFormat.Bmp);

【讨论】：

经过测试，我发现高分辨率屏幕有问题。在这些情况下，仅捕获了浏览器控件的左上部分。因此，我更改了尺寸计算，如下所示...

【解决方案2】：

以下是对@luvieere 解决方案的改编：

WebBrowser browser1;
browser1 = this.Browser;

// I used the GetContentBounds()
Rect bounds = VisualTreeHelper.GetContentBounds(browser1);
// and the point to screen command for the top-left and the bottom-right corner
System.Windows.Point pTL = browser1.PointToScreen(bounds.TopLeft);
System.Windows.Point pBR = browser1.PointToScreen(bounds.BottomRight);

System.Drawing.Bitmap image = new 
// The size is then calculated as difference of the two corners
System.Drawing.Bitmap(
    System.Convert.ToInt32(pBR.X - pTL.X),   
    System.Convert.ToInt32(pBR.Y - pTL.Y));

System.Drawing.Graphics imgGraphics = System.Drawing.Graphics.FromImage(image);

imgGraphics.CopyFromScreen(pTL.X, pTL.Y, 0, 0, new System.Drawing.Size(image.Width, image.Height));

fileName = System.IO.Path.GetFileNameWithoutExtension(fileName) + ".bmp";
image.Save(fileName, System.Drawing.Imaging.ImageFormat.Bmp);

对于那些喜欢 VB 方言的人

Dim browser1 As WebBrowser
browser1 = Me.Browser

Dim bounds As Rect = VisualTreeHelper.GetContentBounds(browser1)

Dim pTL As System.Windows.Point = browser1.PointToScreen(bounds.TopLeft)
Dim pBR As System.Windows.Point = browser1.PointToScreen(bounds.BottomRight)

Dim image As System.Drawing.Bitmap = New System.Drawing.Bitmap(CInt(pBR.X - pTL.X), CInt(pBR.Y - pTL.Y))
Dim imgGraphics As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(image)

imgGraphics.CopyFromScreen(pTL.X, pTL.Y, 0, 0, New System.Drawing.Size(image.Width, image.Height))

fileName = IO.Path.GetFileNameWithoutExtension(fileName) & ".bmp"
image.Save(fileName, System.Drawing.Imaging.ImageFormat.Bmp)

【讨论】：