Unplanned
Last Updated: 08 Sep 2022 12:59 by ADMIN
GridViewMultiColumnComboBoxColumn does not have any selected value in edit mode when SelectionBoxesVisibility is set to Collapsed/Hidden and AutoCompleteMode is Search/Suggest.
Completed
Last Updated: 31 Aug 2022 12:47 by ADMIN
Release LIB 2022.2.905 (05 September2022)

If you set the KeepDropDownOpen property of RadMultiColumnComboBox to False, clicking outside of the control should close the popup showing the dropdown content. This stops working after you drag a row from the GridView outside of the dropdown. For example, the drop can happen outside of the RadMultiColumnComboBox control or on its text input and drop down button area.

To resolve this, you can subscribe to the PreviewMouseLeftButtonUp event of RadMultiColumnComboBox and capture the mouse when needed.

this.mccb.AddHandler(RadMultiColumnComboBox.PreviewMouseLeftButtonUpEvent, new MouseButtonEventHandler(Mccb_MouseLeftButtonUp), true);
//---------------
private void Mccb_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
	var button = Mouse.DirectlyOver as RadDropDownButton;
	if (this.mccb.IsDropDownOpen && button != null && button.TemplatedParent is RadMultiColumnComboBox)
	{
		Dispatcher.BeginInvoke(new Action(() => { button.CaptureMouse(); }));
	}
}

Completed
Last Updated: 18 Jul 2022 08:52 by ADMIN
Release LIB 2022.2.718 (18 July 2022)

The value of the SelectedItem is shown twice when the theme is changed.

A temporary solution to this would be to revert to the 2022.2.511 version.

Completed
Last Updated: 11 Jul 2022 06:55 by ADMIN
Release LIB 2022.2.711 (11 July 2022)

The text of the text input box is automatically assigned if SelectedItem is set initially. This should happen when the SelectionBoxesVisibility property is set to Visible (which is the default value). For example, if you have an item called "Item A" and you assign it to the SelectedItem property at startup of the control, then the text will also become "Item A".

To work this around, you can manually clear the text on loaded of the control.

private void RadMultiColumnComboBox_Loaded(object sender, RoutedEventArgs e)
{
	var mccb = (RadMultiColumnComboBox)sender;	
	var tb = mccb.FindChildByType<TextBox>();
	tb.Text = string.Empty;
}

Completed
Last Updated: 16 Jun 2022 12:06 by ADMIN
Release R2 2022 SP1
The issue reproduces if you set the SelectedItem of the RadMultiColumnComboBox control before its textbox is loaded. One way for this situation to occur is if you data bind the SelectedItem to a property of the view model and then assign to the view model to the DataContext of the view, before the InitializeComponent call.

To work this around, you can reset the SelectedItem property on Loaded.

private void RadMultiColumnComboBox_Loaded(object sender, RoutedEventArgs e)
{
	var mccb = (RadMultiColumnComboBox)sender;            
	var selection = mccb.SelectedItem;
	mccb.SetCurrentValue(RadMultiColumnComboBox.SelectedItemProperty, null);
	mccb.SetCurrentValue(RadMultiColumnComboBox.SelectedItemProperty, selection);
}
Completed
Last Updated: 30 May 2022 09:14 by ADMIN
Release LIB 2022.2.530 (30 May 2022)

When the SelectionMode of MultiColumnComboBox is set to Single, changing the Selection invokes twice the SelectionChanged event.

What I would expect is that the event fires only once, with one item in AddedItems and one item in RemovedItems. Currently, addition and removal is done seperately, and the two invocations of the event correspond to them.

To reproduce, just use the Getting Started article about MultiColumnComboBox with the Clubs ItemSource. Subscribe to SelectionChanged event and make a change to the selection. I hope the following gif makes this clear - the first selection is valid, but the second should invoke the event only once, with 1 item added, 1 removed.

Completed
Last Updated: 07 Jan 2022 07:09 by ADMIN
Release R1 2022

The drop-down menu does not close when a context menu is opened on top of it, even if the KeepDropDownOpen="False". The control would need to move the focus in order for the drop-down to close.

To work this around, you can use the CloseDropDown() method of the MultiColumnComboBox control.

Completed
Last Updated: 20 Sep 2021 07:04 by ADMIN
Release LIB 2021.3.920 (20 Sep 2021)
The search text gets cleared when a click on the combobox occurs (to open a combobox). No selection is performed during this action.

To work this around, you can cache the search text just before it is cleared and then restore it after the selection is performed.
Completed
Last Updated: 02 Aug 2021 08:02 by ADMIN
Release LIB 2021.2.802 (2 Aug 2021)

When placing controls in the CellTemplate/CellEditTemplate in the RadMultiColumnComboBox`s dropdown`s GridView some do not receive/accept the mouse input correctly.

In the newest version (2021.2.615) the dropdown of a RadDatePicker does not open. A RadButton works fine and a RadComboBox open and can select an item via mouse click.

In a previous version (2021.1.325) the RadComboBox also does not work, this seems to be fixed already.

 

I have attached a sample project demonstrating the behavio:

1) start the project

2) open the dropdown of the RadMultiColumnComboBox

3) click on the RadDatePicker`s calender icon button. => the calender view does not open

The very same DataTemplate is applied obove the RadMultiColumnComboBox to illustrate the proper behavior in contrast.

 

The behavior is visually demonstrated in the .gif (1.gif and 2.gif) I have attached.

Completed
Last Updated: 20 May 2021 07:14 by ADMIN
Release LIB 2021.2.525 (25/05/2021)

If you host RadMultiColumnComboBox in a control with a vertical ScrollViewer, then open the popup content of the RadMultiColumnComboBox and use the mouse wheel in it, the parent ScrollViewer scrolls. In comparison RadComboBox and the native WPF ComboBox are not scrolling. Instead the scrolling event is consumed and it doesn't propagate to the parent ScrollViewer.

The attached project shows one way to work this around.

Completed
Last Updated: 26 Nov 2020 14:40 by ADMIN
Release R3 2020 SP1
Created by: Dinko
Comments: 0
Category: MultiColumnComboBox
Type: Feature Request
0
We can expose a way to select the text of the selected item when the MCCB is focused.
Unplanned
Last Updated: 04 Nov 2020 10:30 by ADMIN
When the SelectedBoxesVisiblity property is set to Collapsed and the SelectedItem is bound, no text appears in the control when an item is select.
Completed
Last Updated: 15 Oct 2020 14:30 by ADMIN
Release R3 2020 SP1
The received exception is: "System.ArgumentNullException: 'Value cannot be null.
Parameter name: source'".
Completed
Last Updated: 28 Sep 2020 09:54 by ADMIN
Release LIB 2020.3.928 (09/28/2020)
Selecting an item is not possible after the RadGridView control in the dropdown has been sorted.
Completed
Last Updated: 02 Sep 2020 10:54 by ADMIN
Release R3 2020
RadGridView columns expose a IsSearchable property that is not taken into account when you use RadMultiColumnComboBox and search via the autocomplete box. Add support for the property. If set to False, the searching should not find the corresponding column.
Completed
Last Updated: 31 Aug 2020 10:40 by ADMIN
Release LIB 2020.2.831
When the filtered items in the RadGridView do not contain the currently selected items, they are cleared. 
Unplanned
Last Updated: 28 Aug 2020 10:59 by ADMIN
Created by: Mats
Comments: 0
Category: MultiColumnComboBox
Type: Feature Request
4

Remove the possibility for one or more rows to be searched on.

In other words, it should not be possible to select disabled item rows by search.

Completed
Last Updated: 16 Jun 2020 12:59 by ADMIN
Release R2 2020 SP
Created by: Franz
Comments: 0
Category: MultiColumnComboBox
Type: Feature Request
3
The selection is lost when sorting or filtering is applied and the control is already filtered.
Unplanned
Last Updated: 05 Jun 2020 11:48 by ADMIN
Currently the search text is cleared after a selection is made in the RadMultiColumnComboBox. We can provide an option to avoid this and keep the entered text after the selection is made. 
Completed
Last Updated: 21 May 2020 08:28 by ADMIN
Release LIB 2020.2.526 (05/26/2020)

If you select an item in RadMultiColumnComboBox and then replace the ItemsSource of the GridViewItemsSourceProvider, the selection in the autocompletebox part of the the control is not cleared. There are items that are still selected and are not presented in the ItemsSource.

To work this around, you can create a custom GridViewItemsSourceProvider and override its OnPropertyChanged method. When the ItemsSource is changed, you can reset the selection.

public class CustomGridViewItemsSourceProvider : GridViewItemsSourceProvider
{
	public RadMultiColumnComboBox Owner
	{
		get { return (RadMultiColumnComboBox)GetValue(OwnerProperty); }
		set { SetValue(OwnerProperty, value); }
	}
	
	public static readonly DependencyProperty OwnerProperty =
		DependencyProperty.Register(
			"Owner", 
			typeof(RadMultiColumnComboBox), 
			typeof(CustomGridViewItemsSourceProvider), 
			new PropertyMetadata(null));

	protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
	{
		base.OnPropertyChanged(e);
		if (e.Property.Name == "ItemsSource" && this.Owner != null)
		{
			this.Owner.SelectionBridge.ClearOwnerSelection();
		}
	}
}

 <telerik:RadMultiColumnComboBox.ItemsSourceProvider>
                <local:CustomGridViewItemsSourceProvider Owner="{Binding ElementName=mccb}" />
            </telerik:RadMultiColumnComboBox.ItemsSourceProvider>

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