/// <summary>
/// main logic to generate auto suggestion list.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.Controls.TextChangedEventArgs"/>
/// instance containing the event data.</param>
void textBox_TextChanged(object sender, TextChangedEventArgs e)
{
TextBox textBox = sender as TextBox;
textBox.AutoWordSelection = false;
// if the word in the textbox is selected, then don't change item collection
if ((textBox.SelectionStart != 0 || textBox.Text.Length==0))
{
this.Items.Clear();
//add new filtered items according the current TextBox input
if (!string.IsNullOrEmpty(textBox.Text))
{
foreach (string s in this.autoSuggestionList)
{
if (s.StartsWith(textBox.Text, StringComparison.InvariantCultureIgnoreCase))
{
string unboldpart = s.Substring(textBox.Text.Length);
string boldpart = s.Substring(0, textBox.Text.Length);
//construct AutoCompleteEntry and add to the ComboBox
AutoCompleteEntry entry = new AutoCompleteEntry(s, boldpart, unboldpart);
this.Items.Add(entry);
}
}
}
}
// open or close dropdown of the ComboBox according to whether there are items in the
// fitlered result.
this.IsDropDownOpen = this.HasItems;
//avoid auto selection
textBox.Focus();
textBox.SelectionStart = textBox.Text.Length;
}