WPF: Changing a ComboBox's ItemTemplate removes the ability to jump down the list as you type. Any way to fix this?

Question

PersonVM.cs

public class MainWindowVM
{
    public MainWindowVM()
    {
        PersonList = new ObservableCollection(Employees);
    }

            


        

Answer 1

See my answer to this question: Can I do Text search with multibinding

Unfortunately TextSearch.Text doesn't work in a DataTemplate. I think you have two options here

Option 1. Set IsTextSearchEnabled to True for the ComboBox, override ToString in your source class and change the MultiBinding in the TextBlock to a Binding

<ComboBox ...
          IsTextSearchEnabled="True">
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding}"/>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox> 

public class Person
{
    public override string ToString()
    {
        return String.Format("{0} | {1}", Name, ID);
    }

    public string Name { get; set; }
    public int ID { get; set; }
}

Option 2. Make a new Property in your source class where you combine Name and ID for the TextSearch.TextPath. Also, you should call OnPropertyChanged for NameAndId whenever you do it for Name or ID

<ComboBox ...
          TextSearch.TextPath="NameAndId"
          IsTextSearchEnabled="True">


public string NameAndId
{
    return String.Format("{0} | {1}", Name, ID);
}