wpf - WPF DataGrid问题: why the data output twice?

Question

我是WPF编程的新手。我编写了有关WPF DataGrid控件的简单示例，并使用MVVM模式。我想做的是在DataGrid控件中显示数据。但是，数据总是在数据网格中重复。输出如下图所示:

代码段:

// Model: 
Public class Machine
{
    Private string _uuid;
    public string UUID {get{ return _uuid; } set{ _uuid = value; }}
    public Targets(string uuid)
    {
         UUID = uuid;
    }
 }


// ViewModel:
public class MainWindowViewModel
{
    private readonly ObservableCollection<Machine> _machine = new ObservableCollection<Machine>();
    public MainWindowViewModel()
    {
        _machine.Add(new Machine("1234"));
    }
    public ObservableCollection< Machine > Machines
    {
        get { return _machine; }
    }
}

// XAML:
<DataGrid Name="datagGrid1" Margin="2,2,2,2" ItemsSource="{Binding Machines}" IsReadOnly="True">
     <DataGrid.Columns>
           <DataGridTextColumn Width="120"
                           Binding="{Binding UUID}"
                       Header="UUID-S" />
     </DataGrid.Columns>
 </DataGrid>

Answer 1

您需要在XAML中设置 AutoGenerateColumns="False" 。

<DataGrid AutoGenerateColumns="False" Name="datagGrid1" Margin="2,2,2,2" ItemsSource="{Binding Machines}" IsReadOnly="True">
    <DataGrid.Columns>
        <!-- ...