private void cbx_PreviewKeyDown(object sender, KeyEventArgs e)
{
if (e.Key != Key.Up && (e.Key == Key.Return || e.Key == Key.Return) && Cbx.LivePreviewItem != null)
{
Cbx.SelectedItem = RuntimeHelpers.GetObjectValue(Cbx.LivePreviewItem);
Tbx.SelectionStart = Tbx.Text.Length;
Cbx.IsDropDownOpen = false;
Tbx.Focus();
e.Handled = true;
}
}
private void cbx_IsDropDownOpenChanged(object sender, EventArgs e)
{
if (Cbx.IsDropDownOpen)
{
return;
}
updating = true;
try
{
Cbx.SelectedItem = null;
Tbx.SelectionStart = Tbx.Text.Length;
Tbx.Focus();
}
finally
{
updating = false;
}
}
private void UpdateFilter()
{
if (Tbx.Text == string.Empty)
{
Cbx.IsDropDownOpen = false;
Cbx.Items.Filter = null;
}
else
{
updating = true;
try
{
Cbx.IsDropDownOpen = true;
if (Cbx.SelectedIndex != 0)
{
Cbx.Items.Filter = item =>
{
if (Tbx.Text.Length <= 0)
{
return(true);
}
var val = item as IComboBoxProperties;
if (val != null)
{
return(val.Name != null && val.Name.ToLower().Contains(Tbx.Text.ToLower()));
}
return(true);
};
}
Tbx.Focus();
}
finally
{
updating = false;
}
}
}