数据网格中的组合框使用 mvvm 和 caliburn.micro

Question

几天来我一直在尝试使用 MVVM 和 Caliburn.Micro 在数据网格中添加组合框。
我已经尝试了几乎所有我能找到的建议 - 运气不好！

我的 Xaml 在用户控件中 - 名称和测试显示正常！

XAML:

<DataGrid x:Name="Players" AutoGenerateColumns="False" Height="200" HorizontalAlignment="Left"  VerticalAlignment="Top" Width="308">    
    <DataGrid.Columns>
        <DataGridTextColumn Header="Name" Binding="{Binding Name}"/>
        <DataGridTextColumn Header="Test" Binding="{Binding Position}"/>
        <DataGridComboBoxColumn x:Name="ComboBoxColumn" Header="Position"  SelectedItemBinding="{Binding Position}"/>
    </DataGrid.Columns>
</DataGrid>

ViewModel:

public class MissingCTypeViewModel : Screen, INotifyPropertyChanged
{
    public ObservableCollection<Player> Players { get; set; }
    public ObservableCollection<string> Positions { get; set; }

    public MissingCTypeViewModel()
    {

        Positions = new ObservableCollection<string>() { "Forward", "Defense", "Goalie" };
        Players = new ObservableCollection<Player>(){
                new Player() {Name = "Tom",Position= "Forward"},
                new Player() {Name = "Dick", Position= "Defense"},
                new Player() {Name = "Harry", Position= "Goalie"}
            };
        //ComboBoxColumn.ItemsSource = Positions;
        //dataGrid1.ItemsSource = Players;
    }
}

public class Player
{
    public string Name { set; get; }
    public string Position { set; get; }
}

结果：

Answer 1

您缺少 DataGridComboBoxColumn ItemsSource 绑定到 Positions 集合。

请注意，您需要将其作为 static 资源 - 请参阅：Binding ItemsSource of a ComboBoxColumn in WPF DataGrid

XAML:

xmlns:vm="clr-namespace:TheNamespeceOfYourApp.ViewModels"

<DataGrid.Columns>
    <DataGridTextColumn Header="Name" Binding="{Binding Name}"/>
    <DataGridTextColumn Header="Test" Binding="{Binding Position}"/>
    <DataGridComboBoxColumn x:Name="ComboBoxColumn" Header="Position"  SelectedItemBinding="{Binding Position}" ItemsSource="{Binding Source={x:Static vm:MissingCTypeViewModel.Positions}}"/>
</DataGrid.Columns>

视图模型：

public static List<string> Positions = new List<string>() { "Forward", "Defense", "Goalie" };`

数据网格中的组合框使用 mvvm 和 caliburn.micro

combobox in datagrid using mvvm and caliburn.micro

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