.net 在数据网格中：如何在更改单元格 A 中的值后显示单元格 B 中的更改

我的第一个猜测是，您没有在您的属性上实现INotifyPropertyChange.

这是一个使用CommunityToolkit.Mvvm NuGet包的示例代码，它将为您生成实现INotifyPropertyChanged的代码.

Item.cs个

public partial class Item : ObservableObject
{
    [ObservableProperty]
    private string name = string.Empty;

    [ObservableProperty]
    [NotifyPropertyChangedFor(nameof(Total))]
    private int price;

    [ObservableProperty]
    [NotifyPropertyChangedFor(nameof(Total))]
    private int quantity;

    public int Total => Price * Quantity;
}

MainPageViewModel.cs个

public partial class MainPageViewModel : ObservableObject
{
    [ObservableProperty]
    private ObservableCollection<Item> items = new();

    public MainPageViewModel()
    {
        Items.Add(new Item { Name = "A", Price = 100, Quantity = 1 });
        Items.Add(new Item { Name = "B", Price = 200, Quantity = 2 });
        Items.Add(new Item { Name = "C", Price = 300, Quantity = 3 });
        Items.Add(new Item { Name = "D", Price = 400, Quantity = 4 });
        Items.Add(new Item { Name = "E", Price = 500, Quantity = 5 });
    }
}

MainPage.xaml个

<Page
    x:Class="DataGridExample.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:controls="using:CommunityToolkit.WinUI.UI.Controls"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local="using:DataGridExample"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
    mc:Ignorable="d">
    <Page.DataContext>
        <local:MainPageViewModel x:Name="ViewModel" />
    </Page.DataContext>

    <Grid>
        <controls:DataGrid
            AutoGenerateColumns="False"
            ItemsSource="{x:Bind ViewModel.Items, Mode=OneWay}">
            <controls:DataGrid.Columns>
                <controls:DataGridTextColumn
                    Binding="{Binding Name}"
                    Header="Name"
                    IsReadOnly="True" />
                <controls:DataGridTextColumn
                    Binding="{Binding Price}"
                    Header="Price" />
                <controls:DataGridTextColumn
                    Binding="{Binding Quantity}"
                    Header="Quantity" />
                <controls:DataGridTextColumn
                    Binding="{Binding Total}"
                    Header="Total"
                    IsReadOnly="True" />
            </controls:DataGrid.Columns>
        </controls:DataGrid>
    </Grid>
</Page>