Hide All Rows on Edit and Display the Edit Form Only

When the grid presentation area is restricted on your page you may not want to display the rest of the grid items on item editing (as thus the control will expand its height). To hide all rows in Telerik RadGrid on item editing and display merely the edit form for the editing item (along with that item), you need to:

1. Subscribe to the PreRender event of Telerik RadGrid

2. Verify whether RadGrid1.EditItems.Count is greater than 0

3. Traverse all grid items which differ from the item in the RadGrid1.EditItems collection and set their Visible attribute to False

After update/cancel operation, the rest of the grid records will show up on the page.

<telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" runat="server">
  <MasterTableView AutoGenerateColumns="True">
    <Columns>
      <telerik:GridEditCommandColumn UniqueName="EditCommandColumn" />
    </Columns>
  </MasterTableView>
</telerik:RadGrid>

private void RadGrid1_PreRender(object sender, System.EventArgs e)
{
    if (RadGrid1.EditItems.Count > 0)
    {
        foreach (GridDataItem item in RadGrid1.MasterTableView.Items)
        {
            if (item != RadGrid1.EditItems[0])
            {
                item.Visible = false;
            }
        }
    }
}

Protected Sub RadGrid1_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles RadGrid1.PreRender
    If (RadGrid1.EditItems.Count > 0) Then
        For Each item As GridDataItem In RadGrid1.MasterTableView.Items
            If (Not item Is RadGrid1.EditItems(0)) Then
                item.Visible = False
            End If
        Next
    End If
End Sub