MultiColumnComboBox with ScrollOnMouseWheel skips every second entry

[Julian]

Hi,

I have a MultiColumnComboBox with the activated ScrollOnMouseWheel function which make the mouse wheel scroll through the entries when the dropdown is closed, that is what I want.

But by scrolling this way every second item is skipped, and therefore half of the entires cannot be reached.

Is there a way to change that behaviour?

 

Thanks

Julian

[Dess | Tech Support Engineer, Principal]

Hi,Julian,

Following the provided information, I prepared a sample project using the following code snippet:

        
public RadForm1()
        {
            InitializeComponent();

            DataTable dt = new DataTable();
            dt.Columns.Add("Id", typeof(int));
            dt.Columns.Add("Name", typeof(string));
for (int i = 0; i < 20; i++)
            {
                dt.Rows.Add(i, "Item"+i);
            }
            this.radMultiColumnComboBox1.DisplayMember = "Name";
            this.radMultiColumnComboBox1.ValueMember = "Id";
            this.radMultiColumnComboBox1.DataSource = dt;
            this.radMultiColumnComboBox1.ScrollOnMouseWheel = true;
            this.radMultiColumnComboBox1.SelectedValueChanged+=radMultiColumnComboBox1_SelectedValueChanged;
        }

        private void radMultiColumnComboBox1_SelectedValueChanged(object sender, EventArgs e)
        {
            Console.WriteLine("Value: "+this.radMultiColumnComboBox1.SelectedValue);
        }
            

Indeed, scrolling with the mouse wheel jumps two items each time in RadMultiColumnComboBox:

I have logged it in our feedback portal by creating a public thread on your behalf. You can track its progress, subscribe for status changes and add your comments on the following link - feedback item.

I have also updated your Telerik points.

Currently, the possible solution that I can suggest is to disable the mouse wheel scrolling and manage the selected item programmatically: 

            this.radMultiColumnComboBox1.ScrollOnMouseWheel = false;
            this.radMultiColumnComboBox1.MultiColumnComboBoxElement.TextBoxElement.TextBoxItem.TextBoxControl.MouseWheel += TextBoxControl_MouseWheel;

        private void TextBoxControl_MouseWheel(object sender, MouseEventArgs e)
        {
            if (e.Delta > 0)
            {
                this.radMultiColumnComboBox1.EditorControl.GridNavigator.SelectPreviousRow(1);
            }
            else
            {
                this.radMultiColumnComboBox1.EditorControl.GridNavigator.SelectNextRow(1);
            }
        }

I hope this information helps. If you need any further assistance please don't hesitate to contact me. 

Regards,
Dess | Tech Support Engineer, Principal
Progress Telerik

[Julian]

Thank you, I will try your workaround!