Validate Data Before Submitting

2 posts, 0 answers
  1. Trevor
    Trevor avatar
    13 posts
    Member since:
    Jun 2011

    Posted 18 Oct 2011 Link to this post

    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}" >
  2. Nedyalko Nikolov
    Admin
    Nedyalko Nikolov avatar
    871 posts

    Posted 21 Oct 2011 Link to this post

    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

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