c# - 如何通过 DataGrid 标题中的 TextBoxes 中的值填充 ViewModel 中的字典

Question

我们需要解决下面的问题。在视图中我们定义了包含 TextBox 的 DataGrid 和 DataTemplate。DataTemplate 用于 DataGrid 列的 HeaderTemplate。DataGrid 的列是从代码中动态添加的（而不是在 View 后面的代码中）。

我的问题是：

我想在 ViewModel 中填写 Dictionary。该字典将包含 Keys = DataGridTextColumn.Header （列名）和 Values = TextBox.Text 并且应该在 TextBox 中的文本更改时不断填充。怎么做？

这是我的代码：

主窗口.xaml

<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525"
xmlns:wpfToolkit="http://schemas.microsoft.com/wpf/2008/toolkit">

    <Window.Resources>
        <Style TargetType="DataGridColumnHeader">
            <Setter Property="HorizontalContentAlignment" Value="Stretch" />
        </Style>
    </Window.Resources>
    <Grid>
        <DataGrid AutoGenerateColumns="False" HeadersVisibility="Column" HorizontalAlignment="Left" VerticalAlignment="Top"  Loaded="Grid_Loaded">
            <DataGrid.Resources>
                <DataTemplate x:Key="HeaderDataTemplate">
                    <StackPanel Orientation="Vertical" >
                        <ContentControl Content="{Binding}" />
                        <TextBox x:Name="tbName"/>
                    </StackPanel>
                </DataTemplate>
            </DataGrid.Resources>
            <DataGrid.Columns>
            </DataGrid.Columns>
        </DataGrid>        
    </Grid>
</Window>

主窗口.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.ComponentModel;

namespace WpfApplication1
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            this.DataContext = new ViewModel();
        }

        private void Grid_Loaded(object sender, RoutedEventArgs e)
        {
            DataGrid grid = (DataGrid)sender;
            ResourceDictionary resourecs = grid.Resources;
            grid.Columns.Add(new DataGridTextColumn() { Header = "Column_1", Width = 150, HeaderTemplate = (DataTemplate)resourecs["HeaderDataTemplate"] });
            grid.Columns.Add(new DataGridTextColumn() { Header = "Column_2", Width = 150, HeaderTemplate = (DataTemplate)resourecs["HeaderDataTemplate"] });
            grid.Columns.Add(new DataGridTextColumn() { Header = "Column_N", Width = 150, HeaderTemplate = (DataTemplate)resourecs["HeaderDataTemplate"] });
        }
    }

    public class ViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        public IDictionary<string, string> HeaderTextValues
        {
            //Here is Dictionary, which should by filled by Key = DataGridTextColumn.Header, Value = TextBox.Text
            get { return null; /*???? */ }
        }
    }
}