private GroupDisplayEventArgs GetDisplayValues(DataGridViewRowPrePaintEventArgs pe)
{
IGroupRow row = source[pe.RowIndex] as IGroupRow;
GroupDisplayEventArgs e = new GroupDisplayEventArgs(row, source.GroupOn);
bool selected = selectedrows.Contains(pe.RowIndex);
e.Selected = selected;
e.SelectionBackColor = selected ? grid.DefaultCellStyle.SelectionBackColor : grid.DefaultCellStyle.BackColor;
e.SelectionForeColor = selected ? grid.DefaultCellStyle.SelectionForeColor : grid.DefaultCellStyle.ForeColor;
e.Font = pe.InheritedRowStyle.Font;
if (showcount)
{
e.Summary = "(" + row.Count + ")";
}
if (showheader)
{
e.Header = source.GroupOn.ToString();
}
e.GroupingInfo.SetDisplayValues(e);
if (e.Cancel)
{
return(null);
}
if (DisplayGroup != null)
{
DisplayGroup(this, e);
if (e.Cancel)
{
return(null);
}
}
return(e);
}
public virtual void SetDisplayValues(GroupDisplayEventArgs e)
{
var o = e.Value;
e.DisplayValue = o == null ? "<Null>" : o.ToString();
}