Question

我有统一的网格，带有按钮和标签。每个按钮都有独特的内容，点击框中的按钮，我想在此框中更改标签。但是我如何弄清楚单击了哪个框按钮以及需要更改哪个标签？

namespace WpfApplication107
{
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        DataContext = new Shop();
    }
}

public class StructOfBox
{
    public string Size { get; set; }
    public string Amount { get; set; }
    public ICommand ChangeSize { get; set; }
}

public class Shop
{
    public Shop()
    {
        Items = new ObservableCollection<StructOfBox>();
        Items.Add(new StructOfBox { Amount = "0", Size = "S", ChangeSize = new RelayCommand(() => ChangeAmount()) });
        Items.Add(new StructOfBox { Amount = "0", Size = "M", ChangeSize = new RelayCommand(() => ChangeAmount()) });
        Items.Add(new StructOfBox { Amount = "0", Size = "L", ChangeSize = new RelayCommand(() => ChangeAmount()) });
        Items.Add(new StructOfBox { Amount = "0", Size = "XL", ChangeSize = new RelayCommand(() => ChangeAmount()) });
    }

    public ObservableCollection<StructOfBox> Items { get; set; }
    public void ChangeAmount()
    {
        // what box?
        Debug.WriteLine("pressed");
    }
}
}

的Xaml：

 <Grid>
    <ItemsControl ItemsSource="{Binding Items}">
        <ItemsControl.ItemsPanel>
            <ItemsPanelTemplate>
                <UniformGrid Columns="2" Rows="2"></UniformGrid>
            </ItemsPanelTemplate>
        </ItemsControl.ItemsPanel>
        <ItemsControl.ItemTemplate>
            <DataTemplate>
                <Border BorderThickness="2" BorderBrush="Green">
                    <Grid>
                        <Grid.RowDefinitions>
                            <RowDefinition></RowDefinition>
                            <RowDefinition></RowDefinition>
                            <RowDefinition></RowDefinition>
                        </Grid.RowDefinitions>
                        <Button Content="{Binding Size}" Command="{Binding ChangeSize}"></Button>
                        <Label Content="{Binding Amount}" Height="25" Grid.Row="2"></Label>
                    </Grid>
                </Border>
            </DataTemplate>
        </ItemsControl.ItemTemplate>
    </ItemsControl>
</Grid>

Answer 1

我会通过＆＃34;呼叫＆＃34; StructOfBox作为ChangeAmount（）处理程序的参数。这样你就可以在不需要知道点击了哪个按钮的情况下更改标签。

但正如Clemens所说，为了使其正常工作，StructOfBox必须实现INotifyPropertyChanged。

Wpf统一网格项

1 个答案: