问题
I'm using the INotifyDataError interface for async validation in WPF. I have a property
<TextBox Grid.Column="5"
Text="{Binding XXX.Name, ValidatesOnNotifyDataErrors=True}"/>
On my view model I have a property
public SomeType XXX
and on the type SomeType I have the property
public string Name
now my ViewModel implements INotifyPropertyChanged and INotifyDataError and validation is done asynchronously in my viewmodel class. SomeType only implements INotifyPropertyChanged.
My questions is this. When I raise ErrorsChanged event with DataErrorsChangedEventArgs(propertyName)) what should the propertyName be. Note my Binding path is XXX.Name. Should propertyName be
- XXX.Name
- Name
or something else or do I have to implement INotifyDataErrorInfo in my SomeType class as well which I was hoping not to have to do as I want my validation to stay in the main view model.
Anyway I've tried both above and the textbox is not getting a red box around it though I can verify that the error event is being raised.
回答1:
afaik i would say you have to implement IDataErrorInfo for your property XXX in your SomeType class because you bind to it. i do this in my projects and it works.
来源：https://stackoverflow.com/questions/19401955/correct-property-name-for-nested-property-and-inotifydataerrorinfo