Approved
Last Updated: 03 Sep 2019 07:43 by ADMIN

Workaround: 

Workarond:
radMultiColumnComboBox1.AutoSize = false;
radMultiColumnComboBox1.MinimumSize = new Size(0, 22);

Completed
Last Updated: 21 Mar 2019 15:08 by ADMIN
Release 2019.1.318 (03/18/2019)

1. Run the project and press "a" in the editable part of RadMultiColumnCombobox.

2. Press Tab. As a result you will notice that no selection will be available. If you run the project with a version prior to R2 2018 (version 2018.2.515), the selection will be kept.

Approved
Last Updated: 28 Feb 2019 14:41 by Ioannis

Populate RadMultiColumnComboBox with data and enable the auto filter functionality. Apply a CompositeFilterDescriptor with two text columns. Try to filter entering several letters and press Tab. You will notice that the SelectedIndexChanged event is not fired in this case. However, if only one FilterDescriptor is added, not a CompositeFilterDescriptor, the selection will be properly updated. 

Please refer to the attached sample project and gif file which illustrates the behavior. 

Approved
Last Updated: 22 Jan 2019 06:20 by ADMIN

Hello,

I'm facing a problem with the MulticolumnCombobox that results in an SelectedValueChanged-Event when the list is dropped down the first time after data source was set. Please use the attached project for reproducing the problem using the following steps:

  1. Start Application on Windows 10 Chinese (Note: The described behaviour will not occur for other cultures (i.e. German will not fire the event at that time))
  2. Click the Button having the Text "RadButton1", which will set the DataSource and fire the event "SelectedValueChanged" (MessageBox will pop up) which is okay at this point.
  3. Now perform the drop down for the Combobox. Using Windows 10 Chinese will fire "SelectedValueChanged" and Windows 10 German will not fire "SelectedValueChanged".

==> As the MulticolumnCombobox performs different based on the culture, this seems to be a bug.

 

If you need further information, please do not hestitate to ask.

Approved
Last Updated: 16 May 2019 05:26 by ADMIN
Completed
Last Updated: 16 May 2019 08:54 by ADMIN
Release R1 2019
Workaround: 

protected override void OnShown(EventArgs e)
{
    base.OnShown(e);

    LightVisualElement lve = this.radMultiColumnComboBox1.MultiColumnComboBoxElement.TextboxContentElement;
    RadArrowButtonElement arrow = this.radMultiColumnComboBox1.MultiColumnComboBoxElement.ArrowButton;
    lve.MaxSize = new Size(lve.Size.Width - arrow.Size.Width - (int)arrow.Border.Width, 0);
}
Under Review
Last Updated: 06 Dec 2018 13:55 by ADMIN
To reproduce: Add a RadMultiColumnCombobox to the form, set the DropDownStyle property to DropDownList and clear the text. You will notice that the height of the control is not bigger than 5 px.

Workaround: set MinimumSize 

Me.RadMultiColumnComboBox1.MinimumSize = New Size(200, 23)

Approved
Last Updated: 11 Sep 2018 11:39 by ADMIN
Use attached to reproduce.

- There is still space at the bottom of the grid. 

Workaround:

class MCCM : RadMultiColumnComboBox
{
    protected override RadMultiColumnComboBoxElement CreateMultiColumnComboBoxElement()
    {
        return new MCCBElement();
    }
}
class MCCBElement : RadMultiColumnComboBoxElement
{
    protected override Type ThemeEffectiveType
    {
        get { return typeof(RadMultiColumnComboBoxElement);}
    }
    protected override Size GetPopupSize(RadPopupControlBase popup, bool measure)
    {
        var result = base.GetPopupSize(popup, measure);

        GridTableElement tableElement = this.EditorControl.TableElement;
        int height = 0;
        GridTraverser traverser = new GridTraverser(this.EditorControl.MasterView);
        RowElementProvider rowElementProvider = (RowElementProvider)tableElement.RowScroller.ElementProvider;
        while (traverser.MoveNext())
        {
            height += (int)rowElementProvider.GetElementSize(traverser.Current).Height;
            height += this.EditorControl.TableElement.RowSpacing;
            
        }
        return new Size(result.Width, height +1);
    }
}
Completed
Last Updated: 22 Aug 2018 08:20 by Dimitar
Use attached to reproduce!

Workaround 
The column name must match the field name.
Completed
Last Updated: 10 Aug 2018 09:08 by Dimitar
To reproduce: 
- Set the DropDownStyle to DropDownList
Completed
Last Updated: 20 Jul 2018 08:09 by Dimitar
To reproduce: run the attached project and refer to the attached gif file.

Workaround:

 this.radMultiColumnComboBox1.MultiColumnComboBoxElement.TextBoxElement.TextBoxItem.TextBoxControl.MouseDown += TextBoxControl_MouseDown;

        private void TextBoxControl_MouseDown(object sender, MouseEventArgs e)
        {
            this.radMultiColumnComboBox1.MultiColumnComboBoxElement.TextBoxElement.TextBoxItem.TextBoxControl.SelectAll();
        }
Approved
Last Updated: 26 Jun 2018 09:55 by ADMIN
Use attached to reproduce:

- Press button1, open the drop-down and use the mouse wheel.

Workaround:

class MyMultiColumnComboPopupForm : MultiColumnComboPopupForm
{
    public MyMultiColumnComboPopupForm(PopupEditorBaseElement owner)
       : base(owner)
    {


    }
    public override bool OnMouseWheel(Control target, int delta)
    {
        return true;
    }
}
class MyMCCB : RadMultiColumnComboBox
{
    protected override RadMultiColumnComboBoxElement CreateMultiColumnComboBoxElement()
    {
        return new MyMCCBElement();
    }
}
class MyMCCBElement : RadMultiColumnComboBoxElement
{
    protected override Type ThemeEffectiveType
    {
        get
        {
            return typeof(RadMultiColumnComboBoxElement);
        }
    }
    protected override RadPopupControlBase CreatePopupForm()
    {
        var popupForm = new MyMultiColumnComboPopupForm(this);
        popupForm.EditorControl.Focusable = false;
        popupForm.MinimumSize = this.DropDownMaxSize;
        popupForm.MaximumSize = this.DropDownMaxSize;
        popupForm.Height = this.DropDownHeight;
        popupForm.VerticalAlignmentCorrectionMode = AlignmentCorrectionMode.SnapToOuterEdges;
        popupForm.HorizontalAlignmentCorrectionMode = AlignmentCorrectionMode.Smooth;
        popupForm.RightToLeft = this.RightToLeft ? System.Windows.Forms.RightToLeft.Yes : System.Windows.Forms.RightToLeft.Inherit;
        this.WirePopupFormEvents(popupForm);
        return popupForm;
    }
}


Declined
Last Updated: 25 Jun 2018 10:37 by ADMIN
At the moment when the control receives the focus the text gets selected. if the AllowShowFocusCues property is set to true and the DropDownStyle is set to DropDownList the focus cues should be painted similarly as in RadDropDownList
this.radMultiColumnComboBox1.AllowShowFocusCues = true;
this.radMultiColumnComboBox1.DropDownStyle = Telerik.WinControls.RadDropDownStyle.DropDownList;
Completed
Last Updated: 14 Jan 2019 11:59 by ADMIN
To reproduce: 
- When the filter is set to contains the item is different than the item is selected from the drop-down and the text is taken from the append functionality.

Workaround
Either change the filter to StarrtsWith or remove the suggest functionality. 
Completed
Last Updated: 15 Mar 2018 12:07 by Dimitar
To reproduce:

            this.radMultiColumnComboBox1.DataSource = this.customersBindingSource;
            this.radMultiColumnComboBox1.DisplayMember = "CustomerID";
            this.radMultiColumnComboBox1.AutoFilter = true;

            FilterDescriptor filter = new FilterDescriptor();
            filter.PropertyName = this.radMultiColumnComboBox1.DisplayMember;
            filter.Operator = FilterOperator.Contains;
            this.radMultiColumnComboBox1.EditorControl.MasterTemplate.FilterDescriptors.Add(filter);

1. Click the dropdown button, verify that all items list on drop down
2. Type into the textbox so only one item is left( e.g. "BERGS" )
3. While the drop-down is still opened, click the arrow button.
4. Focus another control on the form and then when the user clicks the arrow button, only one item is still shown in the drop down. 

Workaround:
        private void radMultiColumnComboBox1_DropDownClosed(object sender, RadPopupClosedEventArgs args)
        {
            this.radMultiColumnComboBox1.EditorControl.MasterTemplate.Refresh();
        }
Approved
Last Updated: 12 Feb 2018 10:50 by ADMIN
To reproduce:
- Add a GridViewMultiComboBoxColumn to a grid with wide columns.
- Call the following code in the CellEditorInitialized event handler

editor.EditorControl.LoadElementTree();
editor.AutoSizeDropDownHeight = true;

editor.AutoSizeDropDownColumnMode = BestFitColumnMode.AllCells;
editor.BestFitColumns(true, true);

- The drop down still has a horizontal scrollbar. 

Workaround:
editor.EditorControl.BestFitColumns(BestFitColumnMode.AllCells);

int desiredWidth = 0;
foreach (GridViewColumn column in editor.EditorControl.TableElement.ViewElement.RowLayout.RenderColumns)
{
    desiredWidth += column.Width + editor.EditorControl.TableElement.CellSpacing;
    desiredWidth -= editor.EditorControl.TableElement.CellSpacing;
}
editor.DropDownWidth = desiredWidth + 20;//20 in case the vertical scroll appears. 

Completed
Last Updated: 03 Jul 2017 12:27 by ADMIN
To reproduce: please refer to the attached sample project and refer to the screenshot. You will notice that initially, the arrow is a few pixels up. If you disable and then enable the RadMultiColumnComboBox again you will notice the difference.
Workaround:

        private void radToggleButton1_ToggleStateChanged(object sender, Telerik.WinControls.UI.StateChangedEventArgs args)
        {
            ImagePrimitive img = this.radMultiColumnComboBox1.MultiColumnComboBoxElement.ArrowButton.FindDescendant<ImagePrimitive>();
            img.Margin = new Padding(0);
            if (args.ToggleState == Telerik.WinControls.Enumerations.ToggleState.On)
            {
                this.radMultiColumnComboBox1.Enabled = true;
                this.radMultiColumnComboBox1.MultiColumnComboBoxElement.ArrowButton.Padding = new Padding(0);
            }
            else
            {
                this.radMultiColumnComboBox1.Enabled = false; 
            }
        }
Approved
Last Updated: 19 Jun 2017 11:17 by ADMIN
To reproduce:
Type "Th" into the multi-column combo box in the attached project.  Then press and hold the Backspace key until "Th" is deleted.  Then release Backspace key.  There remain only the filtered options in the dropdown.
If I press and release the backspace key 1x for each typed letter, then the dropdown repopulates as expected.

Workaround: 
 private void radMultiColumnComboBox1_TextChanged(object sender, EventArgs e)
        {
            this.radMultiColumnComboBox1.MultiColumnComboBoxElement.ApplyFilter();
        }
Completed
Last Updated: 15 Aug 2017 10:54 by ADMIN
To reproduce: please refer to the attached sample project which result is illustrated in the attached gif file. The DropDownClosed is expected to be fired when the drop down is already closed. Hence, showing a message box shouldn't keep the drop down opened. The problem is reproducible with RadDropDownList as well. Note that this problem is not applicable for MS ComboBox.

Workaround:  this.radMultiColumnComboBox1.MultiColumnComboBoxElement.DropDownAnimationEnabled = false;
Completed
Last Updated: 19 Jun 2017 12:09 by ADMIN
To reproduce: please refer to the attached sample project and try to enter some numeric value or clear the existing one. Then open the popup.

Workaround: use the custom filtering that RadGridView offers http://docs.telerik.com/devtools/winforms/gridview/filtering/custom-filtering

this.radMultiColumnComboBox1.AutoFilter = true;
FilterDescriptor filter = new FilterDescriptor();
filter.PropertyName = this.radMultiColumnComboBox1.DisplayMember;
filter.Operator = FilterOperator.Contains;
this.radMultiColumnComboBox1.EditorControl.MasterTemplate.FilterDescriptors.Add(filter);
this.radMultiColumnComboBox1.EditorControl.EnableCustomFiltering = true;
this.radMultiColumnComboBox1.EditorControl.CustomFiltering += EditorControl_CustomFiltering;

string search = string.Empty;

private void EditorControl_CustomFiltering(object sender, Telerik.WinControls.UI.GridViewCustomFilteringEventArgs e)
{
    search = this.radMultiColumnComboBox1.MultiColumnComboBoxElement.EditorElement.Text;
    if (search != string.Empty)
    {
        e.Handled = true;
        e.Visible = e.Row.Cells[this.radMultiColumnComboBox1.DisplayMember].Value.ToString().Contains(search);
    }
    else
    {
        e.Handled = false;
    }
}
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