WP7列表框绑定：更改图像uri不会反映在列表框中

Question

I have a view with a list box, bound to am obvervable collection of DisplayItems, which has 'Label', 'DisplayValue' and 'IconUri' properties. I have a View Model which exposes this observable collection. The List Box is correctly populated first time around. I then have a button which takes action on the selected item. I need to indicate that action has been taken by changing the image. I am changing the IconUri of the selected item, and can see the new value present when debugging, but the image doesn't change. I can also change the 'Label' and 'DisplayValue' properties and see the new values correctly there when debugging, but the list doesn't change. My ViewModel implements INotifyPropertyChanged. My DisplayItem class implements INotifyPropertyChanged. I'm calling RaisePropertyChanged I'm sure in too many places rather than too few. None of the changes are ever reflected on screen.

I'm using a DataItemTemplate for the generated rows. If I could access the image of the selected row I could change it manually, but I can't even do that.

Any help greatly appreciated. I could actually do with a example of a list box displaying items from a bound observable collection, where one property of the selected item is changed and that change is reflected in the list box.

Thanks in advance A

Answer 1

您没有正确实现INotifyPropertyChanged ，或者您使用的是错误的。