How to fill in a ComboBox from the reference database and select the one that is written by default?

Question

User interface

I'm not confident with WPF. I have a model class http://pastebin.com/ACPTvW6u , I write the received data from the database into a List of this type - List. And I display it in the DataGrid:

//get data from the database and fill in the
List plavkaList = dal.GetAllPlavka();
dataGrid1.ItemSource = plavkaList;

Everything is good in principle, BUT the catMetal field is connected with the reference table (where the fields are id, value), but now its id is simply displayed.
Question! How can I display the catMetal field in the dataGrid as a ComboBox with items filled in it from the directory database or make the DataGrid as a ComboBox Dropdown, but at the same time, the element that is recorded in the database (the catMetal field) is selected by default?

Answer 1

I figured it out myself.
Added the ArrayList categoryMetal field to the class.
fill it in when data is received, then bind it

<mys:DataGridTemplateColumn x:Name="catMetalColumns" Header="Категория металла">
                                <mys:DataGridTemplateColumn.CellTemplate>
                                    <DataTemplate>
                                        <ComboBox x:Name="catMetalDictColumn" ItemsSource="{Binding metalCategory}" SelectedIndex="{Binding catMetal}" />
                                    </DataTemplate>
                                </mys:DataGridTemplateColumn.CellTemplate>
                            </mys:DataGridTemplateColumn>

Answer 2

You should at least implement INotifyPropertyChanged in your model. Or you can connect MVVMLight and inherit the model from ObservableObject. Otherwise, you are likely to have memory leaks. Well, the notification for binding will not work, of course.
See below for related links:
http://blogs.msdn.com/b/jgoldb/archive/2008/02/04/finding-memory-leaks-in-wpf-based-applications.aspx
http://support.microsoft. com/kb/938416/en-us
Be careful with binding to classes that do not implement INotify...