// This is the most timecritical part, adding items to the ListBox
private void UpdateListBoxItems()
{
try
{
#region Excursus: DataSource vs. AddRange
/*
* // This part is not used due to 'listBox.DataSource' approach (see constructor)
* // left for comparison, delete for productive use
* listBox.BeginUpdate();
* listBox.Items.Clear();
* //Fills the ListBox
* listBox.Items.AddRange(this.CurrentAutoCompleteList.ToArray());
* listBox.EndUpdate();
* // to use this method remove the following
* // "((CurrencyManager)listBox.BindingContext[CurrentAutoCompleteList]).Refresh();" line and
* // "listBox.DataSource = CurrentAutoCompleteList;" line from the constructor
*/
#endregion Excursus: DataSource vs. AddRange
// if there is a TopLevelControl
if ((TopLevelControl != null))
{
_grid.Visible = GridView;
listBox.Visible = !GridView;
if (GridView)
{
_grid.BringToFront();
}
else
{
_grid.SendToBack();
}
// get its width
panel.Width = this.Width + ExtraWidth + (GridView ? ExtraWidth_Pre : 0);
// calculate the remeining height beneath the TextBox
panel.Height = GetMyHeigh(); // ;
// and the Location to use
panel.Location = FindLocation(this) + new Size(0, this.Height); //this.Location + new Size(0, this.Height);
// Panel and ListBox have to be added to TopLevelControl.Controls before calling BingingContext
if (!this.TopLevelControl.Controls.Contains(panel))
{
// add the Panel and ListBox to the PartenForm
this.TopLevelControl.Controls.Add(panel);
}
// Update the listBox manually - List<string> dosn't support change events
// this is the DataSource approche, this is a bit tricky and may cause conflicts,
// so in case fall back to AddRange approache (see Excursus)
if (!GridView)
{
((CurrencyManager)listBox.BindingContext[CurrentAutoCompleteList]).Refresh();
}
}
}
catch (Exception)
{
}
}
