Expanding all rows

In order to expand all rows in RadGridView you have to iterate through them and set the IsExpanded property to true:

Copy[C#] Expanding all rows of RadGridView

void ExpandAllRows(GridViewTemplate template, bool expanded)
{
    foreach (GridViewRowInfo row in template.Rows)
    {
        row.IsExpanded = true;
    }
    if (template.Templates.Count > 0)
    {
        foreach (GridViewTemplate childTemplate in template.Templates)
        {
            ExpandAllRows(childTemplate, true);
        }
    }
}

Copy[VB.NET] Expanding all rows of RadGridView

Private Sub ExpandAllRows(ByVal template As GridViewTemplate, ByVal expanded As Boolean)
    For Each row As GridViewRowInfo In template.Rows
        row.IsExpanded = True
    Next
    If template.Templates.Count > 0 Then
        For Each childTemplate As GridViewTemplate In template.Templates
            ExpandAllRows(childTemplate, True)
        Next
    End If
End Sub

RadControls for WinForms