Expand / Collapse issue after adding rows

[Alain]

Dear Tekerik Team,


I'm using the following code (found on this forum) to expand / collapse a self referencing hierarchy grid:

RadGridView1.TableElement.BeginUpdate()

For Each row1 As GridViewDataRowInfo In RadGridView1.Rows

row1.IsExpanded = True

 

Next

RadGridView1.TableElement.EndUpdate()

While the code works after the data are first loaded, it only collapses child rows when I add a new row to the dataset.  I wonder if there is another method to collapse / expand all rows.

In the same vein and if I add a parent row to the self referencing hierarchy grid, the following code does not start the edit:

Dim

 

lastRow As GridViewRowInfo = RadGridView1.Rows(RadGridView1.Rows.Count - 1)

 

lastRow.EnsureVisible()

lastRow.IsSelected =

True

 

lastRow.Cells(

"Items").BeginEdit()

 

The above code would however start the edit on a child row. Is there any other method for a parent row?


Best regards,
Alain

[Svett]

Hi Alain,

In hierarchy mode, each row has child rows. You can get them by accessing the ChildRows collection of the parent row. Hence, you can use the following code snippet as a sample:

GridViewRowInfo row = this.radGridView1.ChildRows[0];
row.IsExpanded = true;

GridViewRowInfo lastChildRow = row.ChildRows[row.ChildRows.Count - 1];
lastChildRow.IsCurrent = true;
lastChildRow.IsSelected = true;

Kind regards,
Svett
the Telerik team

[Alain]

It works fine.

Thanks for your reply.
Alain

[subbarayan]

Hi

   how to collapse all other rows when i expand a row at mastertemplete(parent row).
thanks.

[Svett]

Hi Subbarayan,

You should use the ChildViewExpanded event of RadGridView to achieve that. You can use the following code snippet as a sample:

private void radGridView1_ChildViewExpanded(object sender, Telerik.WinControls.UI.ChildViewExpandedEventArgs e)
{
    if (e.IsExpanded)
    {
        GridViewTemplate template = e.ParentRow.ViewTemplate;

        foreach (GridViewRowInfo row in template.Rows)
        {
            if (row != e.ParentRow)
            {
                row.IsExpanded = false;
            }
        }
    }
}

I hope this helps. 

Greetings,
Svett
the Telerik team