通过C#代码创建DataGridTemplateColumn

Question

我有一个我已经创建的动态数据网格。我通过后台代码为它创建了每一列。我在一个列上遇到了麻烦，我希望在不编辑时显示在文本块中，但在编辑时显示为组合框。我有一个事务的ObservableCollection。每个事务都有一个称为"Account“的类型。这是我到目前为止所知道的：

    private DataGridTemplateColumn GetAccountColumn()
    {
        // Create The Column
        DataGridTemplateColumn accountColumn = new DataGridTemplateColumn();
        accountColumn.Header = "Account";

        Binding bind = new Binding("Account");
        bind.Mode = BindingMode.TwoWay;

        // Create the TextBlock
        FrameworkElementFactory textFactory = new FrameworkElementFactory(typeof(TextBlock));
        textFactory.SetBinding(TextBlock.TextProperty, bind);
        DataTemplate textTemplate = new DataTemplate();
        textTemplate.VisualTree = textFactory;

        // Create the ComboBox
        bind.Mode = BindingMode.OneWay;
        FrameworkElementFactory comboFactory = new FrameworkElementFactory(typeof(ComboBox));
        comboFactory.SetValue(ComboBox.DataContextProperty, this.Transactions);
        comboFactory.SetValue(ComboBox.IsTextSearchEnabledProperty, true);
        comboFactory.SetBinding(ComboBox.ItemsSourceProperty, bind);

        DataTemplate comboTemplate = new DataTemplate();
        comboTemplate.VisualTree = comboFactory;

        // Set the Templates to the Column
        accountColumn.CellTemplate = textTemplate;
        accountColumn.CellEditingTemplate = comboTemplate;

        return accountColumn;
    }

该值将显示在TextBlock中。但是，在组合框中，我只能让每个项目显示一个字符。例如，下面是文本块：

​

​

但当我单击编辑并进入组合框时，会显示以下内容：

​

​

有人能帮我解决这个问题吗?这样组合框中的项目才能正确显示。此外，当我从组合框中选择某项时，文本块不会使用我选择的项进行更新。

更新：

这是我现在的专栏。ComboBox中的项目显示正常。现在的问题是，当选择一个新项目时，TextBlock中的文本不会随着新项目的更新而更新。

    private DataGridTemplateColumn GetAccountColumn()
    {
        // Create The Column
        DataGridTemplateColumn accountColumn = new DataGridTemplateColumn();
        accountColumn.Header = "Account";

        Binding bind = new Binding("Account");
        bind.Mode = BindingMode.OneWay;

        // Create the TextBlock
        FrameworkElementFactory textFactory = new FrameworkElementFactory(typeof(TextBlock));
        textFactory.SetBinding(TextBlock.TextProperty, bind);
        DataTemplate textTemplate = new DataTemplate();
        textTemplate.VisualTree = textFactory;

        // Create the ComboBox
        Binding comboBind = new Binding("Account");
        comboBind.Mode = BindingMode.OneWay;

        FrameworkElementFactory comboFactory = new FrameworkElementFactory(typeof(ComboBox));
        comboFactory.SetValue(ComboBox.IsTextSearchEnabledProperty, true);
        comboFactory.SetValue(ComboBox.ItemsSourceProperty, this.Accounts);
        comboFactory.SetBinding(ComboBox.SelectedItemProperty, comboBind);

        DataTemplate comboTemplate = new DataTemplate();
        comboTemplate.VisualTree = comboFactory;

        // Set the Templates to the Column
        accountColumn.CellTemplate = textTemplate;
        accountColumn.CellEditingTemplate = comboTemplate;

        return accountColumn;
    }

在我的MainWindow类中，"Accounts“属性是这样声明的：

public ObservableCollection<string> Accounts { get; set; }

    public MainWindow()
    {
        this.Types = new ObservableCollection<string>();
        this.Parents = new ObservableCollection<string>();
        this.Transactions = new ObservableCollection<Transaction>();
        this.Accounts = new ObservableCollection<string>();

        OpenDatabase();
        InitializeComponent();
    }

下面是我的Transaction类：

public class Transaction
{
    private string date;
    private string number;
    private string account;

    public string Date
    {
        get { return date; }
        set { date = value; }
    }

    public string Number
    {
        get { return number; }
        set { number = value; }
    }

    public string Account
    {
        get { return account; }
        set { account = value; }
    }
}

Answer 1

您将ItemsSource绑定到所选值、字符串或字符数组，因此每个字符都被用作一个项，ItemsSource绑定大概应该指向可以从中选择值的其他集合。

Answer 2

Dim newBind As Binding = New Binding("LinktoCommonOutputBus")
newBind.Mode = BindingMode.OneWay

factory1.SetValue(ComboBox.ItemsSourceProperty, dictionary)
factory1.SetValue(ComboBox.NameProperty, name)
factory1.SetValue(ComboBox.SelectedValuePathProperty, "Key")
factory1.SetValue(ComboBox.DisplayMemberPathProperty, "Value")
factory1.SetBinding(ComboBox.SelectedValueProperty, newBind)

通过创建绑定，您可以在数据网格中为WPF设置SelectedValue。