Lines showing parent child relation

[Yury Babaev]

Hello,

is it possible to show lines that mark parent-child relation in self-reference grid, like it's done in RadTreeView by setting ShowLines property to true?

[Ivan Petrov]

Hi Yury,

Thank you for writing.

You can show the lines by setting the RadGridView.TableElement.ShowSelfReferenceLines property to true. After that you can control the color and DashStyle of the lines using the ViewCellFormatting event of the RadGridView. Here is a code snippet which demonstrates how to do this:

private DashStyle lineStyle = DashStyle.Dot;
private Color lineColor = Color.Black;

private void radGridView1_ViewCellFormatting(object sender, CellFormattingEventArgs e)
{
    if (!(e.Row is GridViewDataRowInfo))
    {
        return;
    }

    GridDataCellElement cell = e.CellElement as GridDataCellElement;
    if (!(cell != null && cell.SelfReferenceLayout != null))
    {
        return;
    }

    foreach (RadElement element in cell.SelfReferenceLayout.StackLayoutElement.Children)
    {
        GridLinkItem linkItem = element as GridLinkItem;
        if (linkItem != null)
        {
            linkItem.LineStyle = lineStyle;
            linkItem.ForeColor = lineColor;
        }
        GridExpanderItem expanderItem = element as GridExpanderItem;
        if (expanderItem != null)
        {
            expanderItem.LinkLineStyle = lineStyle;
            expanderItem.LinkLineColor = lineColor;
        }
    }
}

I hope this will be useful for you.

Kind regards,
Ivan Petrov
the Telerik team

[Yury Babaev]

That's exactly what I needed. Thank you.