来自Code Behind的DataTemplate中的DataBind Combobox

问题描述

这个问题可能已被问过好几次了。但是我登陆的所有帖子都没有解决我的问题。我有一个DataModel，它在一个可观察的集合中有一个可观察的集合。可视树应该看起来像ItemsControl-> VirtualizingStack-> Combobox。以下是简单示例，理论上项目应出现在下拉列表中，但事实并非如此。我哪里错了。

This question has probably been asked several times. However all the posts I land on does not solve my problem. I have a DataModel that has an observable collection inside an observable collection. The visual tree should look something like ItemsControl->VirtualizingStack->Combobox. The following is simple example and "theoretically" items should appear in dropdown but it doesn't. Where am I going wrong.

Public MainWindow()
     {
         InitializeComponent();

        ObservableCollection<Tester> Tester1 = new ObservableCollection<Tester>();
         Tester1.Add(new Tester("Sunny", "Jenkins"));
         Tester1.Add(new Tester("Pieter", "Pan"));

        ObservableCollection<Tester> Tester2 = new ObservableCollection<Tester>();
         Tester2.Add(new Tester("Jack", "Sanders"));
         Tester2.Add(new Tester("Bill", "Trump"));

        ObservableCollection<TheT> myDataV = new ObservableCollection<TheT>();
         myDataV.Add(new TheT(Tester1));
         myDataV.Add(new TheT(Tester2));

         IControl.ItemsSource = myDataV;
         IControl.ItemTemplate = TestingDT;
     }

    <ItemsControl x:Name="IControl" Margin="53,375,81,63">
         <ItemsControl.ItemsPanel>
             <ItemsPanelTemplate>
                 <VirtualizingStackPanel Orientation="Horizontal"/>
             </ItemsPanelTemplate>
         </ItemsControl.ItemsPanel>
     </ItemsControl>

    //the Datatemplate
     private DataTemplate TestingDT
     {
         get
         {
                 DataTemplate DFT = new DataTemplate();
                 DFT.DataType = typeof(TheT);

                FrameworkElementFactory Item = new FrameworkElementFactory(typeof(ComboBox));

                Binding B = new Binding("TesterObject")
                 {
                     Source = this
                 };

                 Item.SetBinding(ComboBox.ItemsSourceProperty, B);
                 //Item.SetValue(ComboBox.DisplayMemberPathProperty, "Name");


                 DFT.VisualTree = Item;
                 return DFT;
             }
         }

    //And the DATA Model
     class Tester
         {
             public Tester(string name, string surname)
             {
                 Name = name;
                 Surname = surname;
             }

            public string Name { get; set; }
             public string Surname { get; set; }
             public override string ToString()
             {
                 return Name + " " + Surname;
             }
         }

        class TheT
         {
             ObservableCollection<Tester> TesterObject;

            public TheT(ObservableCollection<Tester> testerObject)
             {
                 TesterObject = testerObject;
             }

            public string myDisplayName { get { return "test"; } }

            public void Add(Collection<Tester> col)
             {
                 TesterObject.Clear();
                 foreach (Tester t in col)
                { TesterObject.Add(t); }
             }
         }

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