获取WPF DataGrid中的Checkbox值

Question

我在wpf中有一个数据网格，在该数据网格中有多个行（项目），并且每行中都有一个复选框列。 我想检查所有行，如果在任何行中都选中了复选框，则执行以下操作是我的代码。 谢谢！

WPF代码

<DataGrid CanUserAddRows="False" AutoGenerateColumns="False"
                  CellEditEnding="SaveDeliveryValue" LoadingRow="DataGrid_LoadingRow"
                  Name="ViewOrdersGrid" HorizontalAlignment="Center" Margin="0,10,0,0" 
                  VerticalAlignment="Top" Height="278" Width="520" BorderBrush="#FFA0A0A0">
            <DataGrid.Columns>
                <DataGridTextColumn  Header="Order No" Width="115" Binding="{Binding Path=BONo, Mode=OneWay}" />
                <DataGridTextColumn Header="Order Date" Width="100" Binding="{Binding Path=BODate, Mode=OneWay, StringFormat=d}" />
                <DataGridTextColumn Header="Total Amount" Width="100" Binding="{Binding Path=BOTotal, Mode=OneWay}" />
                <DataGridTextColumn Header="Total Bikes" Width="100" Binding="{Binding Path=BOTatalBikes, Mode=OneWay}" />
                <DataGridCheckBoxColumn Header="Delivered" x:Name="DeliveryValueCheck" Width="70" Binding="{Binding Path=BODelivered, Mode=TwoWay}" />
            </DataGrid.Columns>
        </DataGrid>

C＃代码

private void Window_Loaded(object sender, RoutedEventArgs e)
        {

            for (int i = 0; i < ViewOrdersGrid.Items.Count; i++)
            {
                CheckBox mycheckbox = ViewOrdersGrid.Columns[4].GetCellContent(ViewOrdersGrid.Items[i]) as CheckBox;
                if (mycheckbox.IsChecked == true)
                {
                    MessageBox.Show("Checked");
                }

            }
        }

Answer 1

通过绑定可以看到您已经在使用MVVM，因此您的开端很好。 现在，由于MVVM允许UI与数据之间建立非常紧密的关系，因此我们可以推断出，如果可以遍历给定对象上已检查属性的可视树，那么我们也应该能够遍历此类属性的数据。 因此，您的C＃代码应如下所示（假设您的代码中DataGrid的ItemsSource已绑定到一个集合（我们将其称为MyItems）：

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    var viewModel = (ViewModelType)this.DataContext;

    foreach(var item in viewModel.MyItems)
    {
        if(item.BODelivered)
        {
            MessageBox.Show("Checked");
        }
    }
}

本示例假定（因为本示例的其余部分适当地使用了绑定）网格已绑定到某些对象（我们称为MyItems）。 如果您需要查看其工作原理（这意味着您尚未将其实现为MVVM和FOOLED ME ），请考虑以下事项：

这是您的XAML

<DataGrid CanUserAddRows="False" AutoGenerateColumns="False"
          CellEditEnding="SaveDeliveryValue" LoadingRow="DataGrid_LoadingRow"
          Name="ViewOrdersGrid" HorizontalAlignment="Center" Margin="0,10,0,0" 
          VerticalAlignment="Top" Height="278" Width="520" BorderBrush="#FFA0A0A0"
          ItemsSource="{Binding MyItems}">
    <DataGrid.Columns>
        <DataGridTextColumn  Header="Order No" Width="115" Binding="{Binding Path=BONo, Mode=OneWay}" />
        <DataGridTextColumn Header="Order Date" Width="100" Binding="{Binding Path=BODate, Mode=OneWay, StringFormat=d}" />
        <DataGridTextColumn Header="Total Amount" Width="100" Binding="{Binding Path=BOTotal, Mode=OneWay}" />
        <DataGridTextColumn Header="Total Bikes" Width="100" Binding="{Binding Path=BOTatalBikes, Mode=OneWay}" />
        <DataGridCheckBoxColumn Header="Delivered" x:Name="DeliveryValueCheck" Width="70" Binding="{Binding Path=BODelivered, Mode=TwoWay}" />
    </DataGrid.Columns>
</DataGrid>

这是你的数据结构

public class MyObject
{
    public int BONo { get; set; }
    public DateTime BODate { get; set; }
    public int BOTotal { get; set; }
    public int BOTatalBikes { get; set; }
    public bool BODelivered { get; set; }
}

这是您的* .xaml.cs文件

// this is the constructor for your view (MyWindow.xaml.cs)
private MyWindow( )
{
    this.DataContext = new MyViewModel( );
}

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    var viewModel = (ViewModelType)this.DataContext;

    foreach(var item in viewModel.MyItems)
    {
        if(item.BODelivered)
        {
            MessageBox.Show("Checked");
        }
    }
}

这是您的视图模型（MyViewModel.cs）

public class MyViewModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged = delegate { };

    public void OnPropertyChanged(string property)
    {
        PropertyChanged(this, new PropertyChangedEventArgs(property));
    }

    private ObservableCollection<YourObjectTypeHere> _myItems;
    public ObservableCollection<YourObjectTypeHere> MyItems
    {
        get
        {
            return _myItems;
        }
        set
        {
            _myItems = value;
            OnPropertyChanged("MyItems");
        }
    }
}