cell backcolor change after scroll

[Tomasz]

Hallo,
It is my first post so Hallo!

I have a problem with radgridview.

Here is my sample code:

private void radGridView1_CellFormatting(object sender, Telerik.WinControls.UI.CellFormattingEventArgs e)
 {
            if (e.CellElement.RowInfo.Cells["io_time_sec"].Value != null)
                {
                    Int64 lTime = Convert.ToInt64(e.CellElement.RowInfo.Cells["io_time_sec"].Value);
                    Int16 nStat = Convert.ToInt16(e.CellElement.RowInfo.Cells["io_state"].Value);

                    if ((lTime <= 0) || (lTime >= 36000)) {
                        e.CellElement.DrawText = true;
                        e.CellElement.ForeColor = Color.Red;
                        e.CellElement.NumberOfColors = 1;
                        e.CellElement.GradientStyle = GradientStyles.Solid;

                    } else {
                        e.CellElement.DrawText = true;
                        e.CellElement.ForeColor = Color.Black;
                        e.CellElement.NumberOfColors = 1;
                        e.CellElement.GradientStyle = GradientStyles.Solid;
                    }
               }
}

Now I want to select the cell where I made ​​the changes.

void dgvView_Changed(object sender, CorrectDateTimeEvents e)
        {
            if (e.en == CorrectDataEventsEnum.Evt_Cancel)
            {
                winform.Close();
            }

            if (e.en == CorrectDataEventsEnum.Evt_OK)
            {
                radGridView1.CurrentRow.Cells["io_datein"].Value = e.valueDateIn;
                radGridView1.CurrentRow.Cells["io_dateout"].Value = e.valueDateOut;

                radGridView1.CurrentCell.DrawFill = true;
                radGridView1.CurrentCell.BackColor = Color.BlueViolet;
                radGridView1.CurrentCell.NumberOfColors = 1;
                radGridView1.CurrentCell.GradientStyle = GradientStyles.Solid;

                winform.Close();

            }
        }

Everything works fine, but after I use the scrol color changes position and jumps to a random record or cell.

What am I doing wrong?

[Tomasz]

I'm sorry - I wanted to put this post for WinForms / gridview not ASP.NET AJAX / grid!
I do not know how it happened
Please administrator for the transfer.

[Stefan]

Hello Tomasz,

Thank you for writing.

RadGridView uses UI virtualization for its cells, which means that the cells are being reused to display different data, hence it is necessary to reset each visual settings you apply. More information and examples you can find here: http://www.telerik.com/help/winforms/gridview-cells-formatting-cells.html.

I hope this helps. 

Regards,
Stefan
Telerik