DataFilter FilterDescriptors.LogicalOperator Changed event

[Shankar]

Hi, we need an event to be fired from the control, when one of the logical operators (AND/OR) are being changed by the user. Is there a way to achieve this?

[Dimitrina]

Hello,

 
You could attach to the RadDataFilter.FilterDescriptors.PropertyChanged event similar to:

this.radDataFilter1.FilterDescriptors.PropertyChanged += new PropertyChangedEventHandler(FilterDescriptors_PropertyChanged);

void FilterDescriptors_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
    if (e.PropertyName == "LogicalOperator")
    {
        // I am no sure what you will do here though...
    }
}

Does it work for you?

Regards,
Didie
the Telerik team

[Shankar]

Thank you Didie, this works fine at the root level.

However this is being fired only when the Logical Operator at the root level is being changed, and not for the subsequent ones. Do I have to recursively handle property changed? Why is it not Notifying despite being an ObservableCollection?

[Dimitrina]

Hello,

In that case you should subscribe for the ItemChanged event, for example:

void FilterDescriptors_ItemChanged(object sender, ItemChangedEventArgs<IFilterDescriptor> e)
{
    if (e.PropertyName == "LogicalOperator")
    {
        // do your stuff
    }
}

  Greetings,
Didie
the Telerik team

[Shankar]

@Didie, that worked, thanks!