Moving Rows Up and Down in GridView

[Gopinath]

Hi

How can i move rows up and down in the grid, by pressing UP Arrow and DownArrow Key. Is there any way to do this?

Regards

Gopinath

 

[Hristo]

Hi Gopinath,

Thank you for writing.

You can accomplish your task by creating a custom row behavior which will override the default implementation of how the Up and Down keys are handled: Row Behavior.

Basically, you will need to override the ProcessKey method in the custom behavior class and swap the cell values. The solution below handles both bound and unbound modes: 

public partial class RadForm1 : Telerik.WinControls.UI.RadForm
{
    private DataTable dt;

    public RadForm1()
    {
        InitializeComponent();

        this.radGridView1.DataSource = this.GetData();
        this.radGridView1.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;

        BaseGridBehavior gridBehavior = radGridView1.GridBehavior as BaseGridBehavior;
        gridBehavior.UnregisterBehavior(typeof(GridViewDataRowInfo));
        gridBehavior.RegisterBehavior(typeof(GridViewDataRowInfo), new CustomGridDataRowBehavior());
    }

    private DataTable GetData()
    {
        dt = new DataTable();

        dt.Columns.Add("Id", typeof(int));
        dt.Columns.Add("Name", typeof(string));
        dt.Columns.Add("Date", typeof(DateTime));
        dt.Columns.Add("Bool", typeof(bool));
        for (int i = 0; i < 500; i++)
        {
            dt.Rows.Add(i, "Name " + i, DateTime.Now.AddDays(i), i % 2 == 0);
        }

        return dt;
    }
}

public class CustomGridDataRowBehavior : GridDataRowBehavior
{
    public override bool ProcessKey(KeyEventArgs keys)
    {
        if (keys.KeyCode == Keys.Up || keys.KeyCode == Keys.Down)
        {
            var oldCurrent = this.GridControl.CurrentRow;
            bool res = base.ProcessKey(keys);
            var newCurrent = this.GridControl.CurrentRow;

            if (newCurrent != null && newCurrent.Index > -1)
            {
                for (int i = 0; i < oldCurrent.Cells.Count; i++)
                {
                    object oldValue = oldCurrent.Cells[i].Value;
                    object newValue = newCurrent.Cells[i].Value;
                    newCurrent.Cells[i].Value = oldValue;
                    oldCurrent.Cells[i].Value = newValue;
                }
            }

            return res;
        }

        return base.ProcessKey(keys);
    }
}

I am also attaching a short video showing the result on my end.

I hope this helps. Should you have further questions please do not hesitate to write back.

Regards,
Hristo
Telerik by Progress

[Gopinath]

Hi Hristo

Thanks for the same, its working food.

Regards

Gopinath