WPF DataGridComboBoxColumn动态绑定枚举

Question

I have a datagrid to which I set item source List<User> . One of the properties of User is Department which is Enum with descriptions.

In the datagrid Departments are displayed as combobox for a user to select one. I need to bind enum value and description to the DataGridComboBoxColumn .

So far I managed either to bind Enum to DataGridComboBoxColumn.ItemsSource thus it works but the description isn't taken into account. Or set collection of Value, Description to DataGridComboBoxColumn.ItemsSource and set DisplayMemberPath , SelectedValuePath . But in this case the value doesn't bind to DataGridComboBoxColumn.

The View:

 <DataGrid x:Name="userData" HorizontalAlignment="Stretch" Margin="10,157,10,80" VerticalAlignment="Stretch" Height="Auto" Width="Auto"
 AutoGeneratingColumn="UserData_OnAutoGeneratingColumn" DisplayMemberPath="Description"/>

The Code:

    private void UserData_OnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
    {
        if (e.Column.SortMemberPath == "Department")
        {
            (e.Column as DataGridComboBoxColumn).ItemsSource = EnumExtension.ProvideValue();

            (e.Column as DataGridComboBoxColumn).DisplayMemberPath = "Description";
            (e.Column as DataGridComboBoxColumn).SelectedValueBinding = new Binding("Value");
            (e.Column as DataGridComboBoxColumn).SelectedValuePath = "Value";
        }
    }

Enum extension:

public static class EnumExtension
{
    public static List<ValueDescriptionVm<Departments>> ProvideValue()
    {
        return Enum.GetValues(typeof(Departments))
        .Cast<object>()
        .Select(enumValue => new ValueDescriptionVm<Departments>()
        {
            Value = (Departments)enumValue,
            Description = GetDescription((Enum)enumValue)
        }).ToList();
    }

    private static string GetDescription(Enum enumValue)
    {
        FieldInfo fi = enumValue.GetType().GetField(enumValue.ToString());
        var attributes = (DescriptionAttribute[])fi.GetCustomAttributes(typeof(DescriptionAttribute), false);

        if (attributes.Length > 0)
        {
            return attributes[0].Description;
        }

        return enumValue.ToString();
    }
}

Answer 1

The path of the SelectedValueBinding should be the name of the property of the User class:

(e.Column as DataGridComboBoxColumn).SelectedValueBinding = new Binding("Department");

Then the binding should work provided that the type of the Department property of the User class and the Value property of the ValueDescriptionVm<Departments> class is the same.