为什么我的WPF Datagrid不显示数据？

通常在WPF中,您可以使用 ObservableCollection<>

因为那时你可以只.Add()/ .Remove()/来自源集合的元素,并且任何绑定的控件(数据绑定)会自动更新(自动属性更改通知).这是WPF中的两个重要概念.

主窗口视图模型

using System.Collections.Generic;

namespace TestDatagrid345.ViewModels
{
  class Window1ViewModel
  {
    private ObservableCollection _customers = new ObservableCollection();
    public ObservableCollection Customers
    {
      Get { return _customers; }
    }
  }
}

主窗口

using System.Collections.Generic;
using System.Windows;

namespace TestDatagrid345
{
  public partial class Window1 : Window
  {
    Window1ViewModel _viewModel;

    public Window1()
    {
      InitializeComponent();
      _viewModel = (Window1ViewModel)this.DataContext; // @#$% (see XAML)
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
      // but this stuff could instead be done on a 'Submit' button click on form:
      _viewModel.Customers.Add(new Customer { FirstName = "Tom", LastName = "Jones" });
      _viewModel.Customers.Add(new Customer { FirstName = "Joe", LastName = "Thompson" });
      _viewModel.Customers.Add(new Customer { FirstName = "Jill", LastName = "Smith" });
    }
  }
}

主窗口XAML