display bitmap value in image control

Question

我有一个位图，我想在图像控制中显示它而不保存它，我该怎么做？

Answer 1

Convert the bitmap to a BitmapImage and assign it to the property (ie in the example CurrentImage ) the image control's Source property is bound to:

MemoryStream ms = new MemoryStream();
_bitmap.Save(ms, ImageFormat.Png);
ms.Position = 0;
BitmapImage bi = new BitmapImage();
bi.BeginInit();
bi.StreamSource = ms;
bi.EndInit();
CurrentImage = bi;

Answer 2

In what way do you have the bitmap? If you a BitmapImage , just set the Image.Source dependency property.

BitmapImage bitmap = ... // whatever
Image image = new Image();
image.Source = bitmap;

In XAML you can set it to something on disk also, or bind it.

<Image Source="myimage.bmp"/>
// Or ...
<Image Source="{Binding Path=PropertyInMyViewModel}"/>

Answer 3

A BitmapImage can take an uri as parameter:

BitmapImage MyImage = new BitmapImage(someuri);

and then you can bind your image control to it

<Image Source={Binding MyImage}/>