将 XAML-Canvas 转换为位图 [英] Convert XAML-Canvas to bitmap

问题描述

我需要将大量 XAML 格式的图标(都只使用画布)转换为位图格式.

I need to convert a large amount of icons in XAML format (all just use canvas) to bitmap format.

有人知道有这样的工具吗?我只找到了 xamltoys/xaml2emf.这有效但不正确 - 颜色混乱且分辨率非常低.

Does anybody know about a tool that does that? I only found xamltoys/xaml2emf. This works but not correctly - colors are messed up and resolution is very low.

推荐答案

我做的这段代码只允许你将任何 FrameworkElement 保存到磁盘:

This piece of code I did will just allow you to save any FrameworkElement to disk:

Public Shared Sub SaveImageOfControlToDisk(ByVal MyControl As FrameworkElement, ByVal FileName As String)
    Dim ThisVisualBrush As New VisualBrush(MyControl)
    Dim ThisDrawingVisual As New DrawingVisual()
    Dim dc As DrawingContext = ThisDrawingVisual.RenderOpen()
    dc.DrawRectangle(ThisVisualBrush, Nothing, New Rect(New Point(), New Size(MyControl.ActualWidth, MyControl.ActualHeight)))
    dc.Close()
    Dim render As New RenderTargetBitmap(MyControl.ActualWidth, MyControl.ActualHeight, 96, 96, PixelFormats.Pbgra32)
    render.Render(ThisDrawingVisual)
    Dim PngEncoder As New PngBitmapEncoder()
    PngEncoder.Frames.Add(BitmapFrame.Create(render))
    Dim ThisStream As New IO.FileStream(FileName, IO.FileMode.Create)
    PngEncoder.Save(ThisStream)
    ThisStream.Flush()
    ThisStream.Close()
End Sub

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