WPF属性问题ImageSource与BitmapImage [英] WPF property problem ImageSource vs BitmapImage

问题描述

大家好

我有一个usercontrol，它从名为Icon的类属性中接收其图像，该属性目前为ImageSource类型.我想将其更改为bitmapimage，因为我想在代码中更改imagesource，而bitmapimage提供了使用BitmapImage.UriSource进行操作的简便方法.

这是我的UserContol Xaml databind

Hi all

I have usercontrol which receives its image from its class property called Icon which is type ImageSource at the moment. I like to change it to bitmapimage because I want to change imagesource in code and bitmapimage offers easy way to do it with BitmapImage.UriSource.

Here is my UserContol Xaml databind

<Image x:Name="imageButtonIcon" Source="{Binding Icon, ElementName=UserControl}" Stretch="Fill">   </Image>

这是可行的，但不需要依赖项属性

And here is working but not wanted dependency property

/// Defines imagesource on buttonicon                    
public ImageSource Icon
   {
    get { return (ImageSource)GetValue(IconProperty); }
    set { SetValue(IconProperty, value); }
    }

// Using a DependencyProperty as the backing store for Image.  This enables animation, styling, binding, etc...
public static readonly DependencyProperty IconProperty = DependencyProperty.Register("Icon", typeof(ImageSource), typeof(MyUserControl), new UIPropertyMetadata(null));

而且，当我仅将上述类型的ImageSource更改为BitmapImage时，它将可以正常编译，但在运行时客户端应用程序将遇到错误"Set属性引发异常"

希望你有主意:)

干杯！

And when I just change above type ImageSource to BitmapImage it will compile fine but at the runtime client applications will face error "Set property threw an exception"

Hope you got idea :)

Cheers!

推荐答案

>！我发现不用改变类型，而是可以使用imagesource本身做同样的事情

Ugh! Instead of changing type I found out that I can do same with imagesource itself

ImageSourceConverter imgConv = new ImageSourceConverter();
string path = "pack://application:,,/Assets/flower.jpg"
ImageSource imageSource = (ImageSource) imgConv.ConvertFromStringpath);
image1.Source = imageSource;

我真的应该在累的时候停止编码，导致出现一些假的问题:)

祝你有美好的一天！

I really should stop coding when tired, leads to dummy questions :)

Have a nice day!

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