This example allows users to add new items to the LookUpEdit and posts these items to the data source.

1. Use the LookUpEditBase.AddNewButtonPlacement property to display the Add New button.

2. When a user clicks this button or enters a value that does not exist in the data source, the LookUpEdit raises the ProcessNewValue event.

3. Create an EventToCommand behavior and execute the ShowProductForm command when the ProcessNewValue event is raised.

4. In the ShowProductForm command, use the DialogService to invoke a new item dialog. This dialog contains the DataLayoutControl that allows users to specify the item's properties.

5. Add the specified item to the data source if the user clicks the Add button.

   

• MainWindow.xaml (VB: MainWindow.xaml)
• ViewModel.cs (VB: ViewModel.vb)
• Products.cs (VB: Products.vb)

• LookUpEdit
• LookUpEditBase.ProcessNewValue
• LookUpEditBase.AddNewButtonPlacement
• DialogService
• DataLayoutControl
• EventToCommand

• WPF LookUpEdit - Customize the Embedded Data Grid
• WPF LookUpEdit - Filter by Multiple Columns
• Use DialogService to Show a Modal Dialog Window