如何在 WPF 中将 WriteableBitmap 对象转换为 BitmapImage 对象
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How do I convert a WriteableBitmap object to a BitmapImage Object in WPF
提问by JMK
How do I convert a WriteableBitmapobject to a BitmapImageObject in WPF?
如何将WriteableBitmap对象转换为BitmapImageWPF 中的对象？
This linkcovers silverlight, the process is not the same in WPF as the WriteableBitmapobject does not have a SaveJpegmethod.
此链接涵盖了 Silverlight，该过程与 WPF 中的过程不同，因为WriteableBitmap对象没有SaveJpeg方法。
So my question is How do I convert a WriteableBitmapobject to a BitmapImageObject in WPF?
所以我的问题是如何在 WPF 中将WriteableBitmap对象转换为对象BitmapImage？
回答by sa_ddam213
You can use one of the BitmapEncodersto save the WriteableBitmapframe to a new BitmapImage
您可以使用其中之一BitmapEncoders将WriteableBitmap帧保存到新的BitmapImage
In this example we will use the PngBitmapEncoderbut just choose the one that fits your situation.
在本例中，我们将使用 ，PngBitmapEncoder但只选择适合您情况的那个。
public BitmapImage ConvertWriteableBitmapToBitmapImage(WriteableBitmap wbm)
{
BitmapImage bmImage = new BitmapImage();
using (MemoryStream stream = new MemoryStream())
{
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(wbm));
encoder.Save(stream);
bmImage.BeginInit();
bmImage.CacheOption = BitmapCacheOption.OnLoad;
bmImage.StreamSource = stream;
bmImage.EndInit();
bmImage.Freeze();
}
return bmImage;
}
usage:
用法：
BitmapImage bitmap = ConvertWriteableBitmapToBitmapImage(your writable bitmap);
or you could make this an extension method for easy use
或者您可以将其设为易于使用的扩展方法
public static class ImageHelpers
{
public static BitmapImage ToBitmapImage(this WriteableBitmap wbm)
{
BitmapImage bmImage = new BitmapImage();
using (MemoryStream stream = new MemoryStream())
{
PngBitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(wbm));
encoder.Save(stream);
bmImage.BeginInit();
bmImage.CacheOption = BitmapCacheOption.OnLoad;
bmImage.StreamSource = stream;
bmImage.EndInit();
bmImage.Freeze();
}
return bmImage;
}
}
usage:
用法：
WriteableBitmap wbm = // your writeable bitmap
BitmapImage bitmap = wbm.ToBitmapImage();
