Question

I have a custom class Contact.

I am trying to bind a List<Contact> to a ComboBox.

But I can’t get the right syntax/commands for the Windows.Resources part, e.g. the code below gives the error ‘The type reference cannot find a public type named ‘List”, what do I need to fix in Windows.Resources to get this to work?

XAML:

<Window x:Class='dpwpf.Window1'     xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'     xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'     Title='Window1' Height='300' Width='300'     xmlns:system='clr-namespace:System;assembly=mscorlib'     xmlns:local='clr-namespace:dpwpf'>      <Window.Resources>         <ObjectDataProvider             x:Key='contacts'             MethodName='GetContacts'             ObjectType='{x:Type system:List}'>             <ObjectDataProvider.MethodParameters>                 <x:Type TypeName='local:GetContacts'/>             </ObjectDataProvider.MethodParameters>         </ObjectDataProvider>     </Window.Resources>       <StackPanel>         <StackPanel>             <TextBlock Text='Select the contact:'/>             <ComboBox ItemsSource='{Binding                 Source={StaticResource contacts}}'/>         </StackPanel>     </StackPanel> </Window> 

Code behind class:

namespace dpwpf {     class StoreDB     {         private string connectionString = 'App_Data/main.sqlite';          public List<Contact> GetContacts()         {             SQLiteConnection conn = new SQLiteConnection('Data Source=' + connectionString);             SQLiteCommand cmd = conn.CreateCommand();              List<Contact> contacts = new List<Contact>();             try             {                 conn.Open();                 cmd.CommandText = String.Format('SELECT * FROM contacts');                 SQLiteDataReader reader = cmd.ExecuteReader();                 while (reader.Read())                 {                     Contact contact = new Contact(                         Int32.Parse(reader[0].ToString()),                         reader[1].ToString(),                         reader[2].ToString()                     );                     contacts.Add(contact);                 }             }             finally             {                 conn.Close();             }              return contacts;         }     } } 

Answer 1

Your problem is in this line:

ObjectType='{x:Type system:List}' 

This needs to be the object in which GetContacts is defined.

In your window1.xaml.cs it would looks something like this:

ObjectType='{x:Type X:Window1}'