Disable controls at run-time | Infragistics Forums

2035

Disable controls at run-time

Arthur Butler posted over 7 years ago

I want to disable some controls in the XamPropertyGrid when the user makes a selection from other control. I have tried this two ways'

1. Changing the read-only attribute on the model, for example:

private void setPropertyReadOnly(string property_name, bool read_only)

{
var attribute = TypeDescriptor.GetProperties(typeof(BraiderSpecModel))[property_name].Attributes[typeof(ReadOnlyAttribute)] as ReadOnlyAttribute;
var field = attribute.GetType().GetField("isReadOnly", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
field.SetValue(attribute, read_only);
}

2. Getting the control object and disabling it:

var editor = Utilities.GetDescendantFromName((_property_grid_category), "CarrierSize2") as XamTextEditor;
if (editor != null)
editor.IsEnabled = !read_only;

Both of these methods work fine when the control is visible on the screen. However, if there is a scrollbar on the XamPropertyGrid, then this code has no effect on the XamPropertyGrid. How can I enable / disable controls in the XamPropertyGridat run-time even when the control is not on the screen?

I am using version 16.1.20161.2134.

Regards,

Arthur

16495

Offline [Infragistics]Zhivko Nikolov posted over 7 years ago
Hello Haimai,

You can create a Dictionary and use it to store the editor's name and the corresponding value for it's IsReadOnly roperty. Then you can create a style, for example for XamTextEditor and handle it's Loaded event by using EventSetter, this way in the event handler you can access the editor from event args. and check whether it exist in your dictionary and depending on the result you can set it's IsReadOnly to TValue:
<Style TargetType="{x:Type igEditor:XamTextEditor}" >
    <EventSetter Event="Loaded" Handler="editor_Loaded"/>
</Style>

private void editor_Loaded(object sender, RoutedEventArgs e)
{
    var editor = (sender as XamTextEditor);
    if (controlsToBeDisabled.ContainsKey(editor.Name))
        editor.IsReadOnly = controlsToBeDisabled.Where(ed => ed.Key == editor.Name.ToString()).FirstOrDefault().Value;
}

Let me know if you have any questions.

Sincerely,
Zhivko
Associate Software Developer
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