从WPF应用程序窗口获取位图？

The Winforms System.Windows.Forms.Control class has an instance method "DrawToBitmap" which I think is very useful in a variety of circumstances. I'm wondering if there's an equivalent way of getting a System.Drawing.Bitmap from a WPF application?

Winforms System.Windows.Forms.Control类有一个实例方法“DrawToBitmap”,我认为它在各种情况下都非常有用。我想知道是否有一种从WPF应用程序获取System.Drawing.Bitmap的等效方法?

I realize I could do some P/Invoke stuff to just get the application window, however I don't like this because it doesn't accomodate the 64bit transition very well, and doesn't let me render sub-controls only, as DrawToBitmap does.

我意识到我可以做一些P / Invoke的东西来获取应用程序窗口,但我不喜欢这个,因为它不能很好地适应64位转换,并且不允许我只渲染子控件,如DrawToBitmap确实。

Thanks, Richard

2 个解决方案

#1

Use RenderTargetBitmap as on MSDN

在MSDN上使用RenderTargetBitmap

RenderTargetBitmap bitmap = new RenderTargetBitmap(width, height, 96, 96, PixelFormats.Pbgra32);
bitmap.Render(this.YourVisualControlNameGoesHere);

#2

TFD is spot on. You could also use the less elegant reference example from MSDN:

TFD是现货。您还可以使用MSDN中不那么优雅的参考示例:

Dim width As Integer = 128
Dim height As Integer = width
Dim stride As Integer = CType(width / 8, Integer)
Dim pixels(height * stride) As Byte

' Try creating a new image with a custom palette.
Dim colors As New List(Of System.Windows.Media.Color)()
colors.Add(System.Windows.Media.Colors.Red)
colors.Add(System.Windows.Media.Colors.Blue)
colors.Add(System.Windows.Media.Colors.Green)
Dim myPalette As New BitmapPalette(Colors)

' Creates a new empty image with the pre-defined palette
Dim image As BitmapSource = System.Windows.Media.Imaging.BitmapSource.Create(width, height, 96, 96, PixelFormats.Indexed1, myPalette, pixels, stride)
Dim stream As New FileStream("new.bmp", FileMode.Create)
Dim encoder As New BmpBitmapEncoder()
Dim myTextBlock As New TextBlock()
myTextBlock.Text = "Codec Author is: " + encoder.CodecInfo.Author.ToString()
encoder.Frames.Add(BitmapFrame.Create(image))
encoder.Save(stream)

#1