WPF ListBox DisplayMemberPath and SelectedValuePath

如何使用Linq to Sql将值和键绑定到列表框?

我正在使用linq to sql类填充一个列表框，这是WPF:

<ListBox  Name="listBox1" Loaded="listBox1_Loaded" />

显示FullName s，但不显示Case_Number:

using (ToolboxDataContext toolboxDB = new ToolboxDataContext())
{
    var x = toolboxDB.DropDownIndividuals().ToList(); 
    listBox1.ItemsSource = x;
}

我也试过这个，没有工作:

foreach (var y in x)
{
    listBox1.DisplayMemberPath = y.FullName.ToString() ;
    listBox1.SelectedValuePath = y.Case_Number.ToString() ;
    // Console.WriteLine(y.Case_Number.ToString());
}

<ListBox DisplayMemberPath="FullName" SelectedValuePath="Case_Number"/>

<ListBox x:Name="listBox1" 
         DisplayMemberPath="FullName" 
         SelectedValuePath="Case_Number" />

using (ToolboxDataContext toolboxDB = new ToolboxDataContext())
     PersonsListBox.ItemsSource = toolboxDB.DropDownIndividuals().ToList();