DataGridComboBoxColumn not displaying list

Question

We have a DataGridComboBoxColumn with bindings set at runtime however when run, no items appear in the list ... in fact the
DataGridComboBoxColumn doesn't even appear to be a dropdown list ... just a box.
The XAML
<DataGrid >
<DataGrid.Columns>
<DataGridComboBoxColumn x:Name="productList"/>
</DataGrid.Columns>
</DataGrid>
The C#
private Products products = = new Products();
public ProductsForm()
InitializeComponent();
InitProducts();
void InitProducts()
productList.ItemsSource = products.theList;
productList.DisplayMemberPath = "ItemCode";
productList.TextBinding = new Binding("ItemCode"); ;
The Products class has a theList property which initialises to a list of products. A product has an ItemCode property. We are trying to populate the list with the ItemCodes.
What are we missing?

Answer 1

First of all you need to set the ItemsSource property of the DataGrid
itself to an IEnumerable for any rows to show up in it:
<DataGrid x:Name="theDataGrid">
<DataGrid.Columns>
<DataGridComboBoxColumn x:Name="productList"/>
</DataGrid.Columns>
</DataGrid>
public class TestClass
public string SelectedItemCode { get; set; }
void InitProducts()
List<TestClass> items = new List<TestClass>();
items.Add(new TestClass()); //row 1
items.Add(new TestClass()); //row 2
theDataGrid.ItemsSource = items;
Second, the ComboBox is only displayed when you are in edit mode, i.e. when you double click on the cell to "open" it up for editing.
Third, you should set the SelectedValueBinding property of the DataGridComboBoxColumn to a binding with a path that specifies the name of the property of the data object class, i.e. the SelectedItemCode of the TestClass in the sample code above,
that holds the selected value:
void InitProducts()
List<TestClass> items = new List<TestClass>();
items.Add(new TestClass()); //row 1
items.Add(new TestClass()); //row 2
theDataGrid.ItemsSource = items;
productList.ItemsSource = products.theList;
productList.DisplayMemberPath = "ItemCode";
productList.SelectedValueBinding = new Binding("SelectedItemCode");
Finally, you should make sure that the type of objects returned by products.theList (your Product class or whatever you call it) has a
public property named "ItemCode".
Please remember to close your threads by marking all helpful posts as answer and then start a new thread if you have a new question. Please don't ask several questions in the same thread.