How to disable the expandred button

[rui]

In my program,  some time i need to disable some propertyDefinition, when the  propertyDefinition has NestedProperties, i also need disable the expand to prevent user open or close the expander

i try to set the IsEnable propetry as this code

 var expanderButtons= myRadPropertyGrid.ChildrenOfType<RadToggleButton>().Where(b => b.Name == "PART_NestedPropertiesButton").ToList();
            expanderButtons.ForEach(t => t.IsEnabled = false);

it is ok at the beginning but when in the case as follows is not 

1.when close or open the properties group;

2.when call the NestedProperties.Reset() method

3. when  switch the propertyGrid to another one and then switch back

it seems  this method can't be done after the second render

how to achieve this?

thank you

[Dilyan Traykov]

Hello ,

There are two approaches I can suggest for your particular scenario:

1) To handle the  event of the control in a similar fashion:

private void Pg_FieldLoaded(object sender, Telerik.Windows.Controls.Data.PropertyGrid.FieldEventArgs e)
{
    var propertyDefinition = e.Field.DataContext as PropertyDefinition;
    if (propertyDefinition.HasNestedProperties && propertyDefinition.IsReadOnly)
    {
        e.Field.ChildrenOfType<RadToggleButton>().FirstOrDefault(b => b.Name == "PART_NestedPropertiesButton").IsEnabled = false;
    }
}

2) To modify the default control template of the PropertyGridField element and add a binding to the RadToggleButton's IsEnabled property pointing to its parent's IsReadOnly property.

For your convenience, I've attached a sample project demonstrating both approaches. Please let me know if any of them works for you.

Regards,
Dilyan Traykov
Progress Telerik

[rui]

Hello Dilyan,

Great! the second is a perfect solution 

thank you very much