代码中的datagridcomboboxcolumn绑定

Question

我想完全用代码来完成，不 XAML：给定

DataGridComboBoxColumn myDGCBC = new DataGridComboBoxColumn();
ObservableCollection<string> DataSource = new ObservableCollection<string>{"Option1", "Option2"};
myDGCBC.ItemsSource = DataSource;

ObservableCollection<MyStructure> MyObject = new ObservableCollection<MyStructure>;

和

public class MyStructure
{
   ... several properties ... // pseudocode, obviously
   public string SelectedValue { get; set; }
}

我有兴趣（绑定）从列中的所有组合框接收选定值到 SelectedValue 属性。

我尝试了 SO 的几个想法，但无济于事。

求助！谢谢

Answer 1

假设 DataGird 已经在 xaml 中定义，您应该为 DataGrid 和 DataGridComboBoxColumn 设置适当的绑定。

举个例子给大家一个思路：

Xaml:

<Grid >
    <Grid.RowDefinitions>
        <RowDefinition Height="*"/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>
    <DataGrid x:Name="myGrid" AutoGenerateColumns="False"/>
    <Button Grid.Row="1"  Content="test" Click="Button_Click"/>
</Grid>

MainWindow.cs:

    //DataGrid ItemsSource
    public ObservableCollection<MyStructure> DataSource { get; set; }

    public MainWindow()
    {
        InitializeComponent();
        DataContext = this;

        // Initializing DataGrid.ItemsSource
        DataSource = new ObservableCollection<MyStructure>();
        DataSource.Add(new MyStructure());

        // Creating new DataGridComboBoxColumn 
        DataGridComboBoxColumn myDGCBC = new DataGridComboBoxColumn();
        myDGCBC.Header = "cmbColumn";

        // Binding DataGridComboBoxColumn.ItemsSource and DataGridComboBoxColumn.SelectedItem
        var cmbItems = new ObservableCollection<string> { "Option1", "Option2" };
        myDGCBC.ItemsSource = cmbItems;
        myDGCBC.SelectedItemBinding = new Binding("SelectedValue");
        // Adding DataGridComboBoxColumn to the DataGrid
        myGrid.Columns.Add(myDGCBC);

        // Binding DataGrid.ItemsSource 
        Binding binding = new Binding();
        binding.Source = DataSource;
        BindingOperations.SetBinding(myGrid, DataGrid.ItemsSourceProperty, binding);
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        //This is just to check whether SelectedValue is set properly:
        string selectedValue = DataSource[0].SelectedValue;
    }

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