Validate Data Before Submitting

[Trevor]

I have a several maskedinputboxes which I have databound to a domain data source and it exposes the validation error from the RIA metadata properly:


The problem I am having is checking for a validation error before passing a Datasource.Submit(). Even though there is a red box up on the screen. I can't figure out a way to check the form(Grid) or even the control for this in the codebehind when the user presses a Submit button. 

 <telerik:RadMaskedTextBox Name="CState" MaskType="Standard" Mask="LL" EmptyContent="State" Value="{Binding State,Mode=TwoWay,NotifyOnValidationError=True}"  />

I've tried this method on just about every relevant object and it always returns false.
Validation.GetHasError(_ValidationForm)

These Controls are on a grid which is bound to the domain data source.
<Grid x:Name="LayoutRoot" Background="Transparent" DataContext="{Binding Data, ElementName=CustomerData}" >

[Nedyalko Nikolov]

Hi Trevor,

Generally Validation.GetHasErrors(DO) or Validation.GetErrors(DO) will return a correct value when there is a binding error directly on DO passed as argument. For example as in your picture Validation.GetHasErrors(_ValidationForm) will return false, while Validation.GetHasErrors(stateTextBox) should return true. So you can use code similar to the following one:

bool hasBindingError  = false;
foreach(var control in ValidationForm.ChildrenOfType<Control>())
{
    if (Validation.GetHasErrors(control))
    {
        hasBindingError = true;
        break;
    }
}

Another possible approach is to use RIA services entities support for INotifyDataErrorInfo interface and check INotifyDataErrorInfo.GetErrors(propertyName) or hook for INotifyDataErrorInfo.ErrorsChanged event.

Kind regards,
Nedyalko Nikolov
the Telerik team