Tab key pressed in GridViewComboBoxColumn

[Todd]

If you have a GridViewComboBoxColumn in a RadGridView control, use your mouse to drop down the list of entries, use your down key on your keyboard to select an entry in the list, now select the tab key on your keyboard.  You will see that the Telerik control leaves behind a blank window (even after closing the form).  Does anyone know how I get rid of this leftover window? 

[Emanuel Varga]

Hello Todd,

Sadly i could not reproduce your issue, but honestly i don't know if I understood the problem correctly, please try the following code and let me know if the same thing happens here, or if i got something wrong please make the necessary changes here so we can have a real example of the problem.

namespace GridLookup
{
    using System;
    using System.ComponentModel;
    using System.Windows.Forms;
    using Telerik.WinControls.UI;

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.Load += new EventHandler(Form1_Load);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.radGridView1.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
            this.radGridView1.DataBindingComplete += new GridViewBindingCompleteEventHandler(radGridView1_DataBindingComplete);
            this.radGridView1.DataSource = new ProductsCollection();
        }

        void radGridView1_DataBindingComplete(object sender, GridViewBindingCompleteEventArgs e)
        {
            radGridView1.Columns["BuyerId"].IsVisible = false;

            var column = new GridViewComboBoxColumn("Buyer", "Buyer");
            column.DataSource = new BuyersCollection();
            column.ValueMember = "Id";
            column.FieldName = "BuyerId";
            column.DisplayMember = "Name";
            this.radGridView1.Columns.Add(column);

            this.radGridView1.BestFitColumns();
        }
    }

    #region Helpers

    public class Product
    {
        public int Id
        {
            get;
            set;
        }

        public int BuyerId
        {
            get;
            set;
        }

        public Product(int id, int buyerId)
        {
            this.Id = id;
            this.BuyerId = buyerId;
        }
    }

    public class Buyer
    {
        public int Id
        {
            get;
            set;
        }

        public string Name
        {
            get;
            set;
        }

        public Buyer(int id, string name)
        {
            this.Id = id;
            this.Name = name;
        }
    }

    public class ProductsCollection : BindingList<Product>
    {
        public ProductsCollection()
        {
            for (int i = 0; i < 10; i++)
            {
                this.Add(new Product(i, i + 10));
            }
        }
    }

    public class BuyersCollection : BindingList<Buyer>
    {
        public BuyersCollection()
        {
            for (int i = 0; i < 10; i++)
            {
                this.Add(new Buyer(i + 10, "Buyer" + (i + 1)));
            }
        }
    }

    #endregion Helpers
}

Also, if you are not using the latest version you should try, if possible, updating to the latest version.

Best Regards,
Emanuel Varga

[Jack]

Hi Todd, please open a support ticket and send us your application. This will help us to understand and locate the issue. 

Should you have any other questions, do not hesitate to ask.

Best wishes,
Jack
the Telerik team