Question

我有一个listview，我已经绑定（twoWay）到数据表。绑定工作正常，数据在listview上正确显示。现在我想要实现的有点复杂，我甚至不确定这是否可以实现或现在。

我的数据表已经说了15列，我在lisview中显示了5列。如果用户在listview上选择一行，我可以在stackpanel中的textblocks中显示该选定行（来自数据表）的其他10个值。这是可以实现还是我要求太高？我试图通过从问题here获取想法来实现这一目标，但却无法做到这一点。如果它是可以实现的，你们能告诉我如何继续这个想法吗？

我认为这可以通过处理listview1_selectionChanged事件并手动填充文本框来实现，但是当我处于学习阶段时，我想探索是否可以通过数据绑定来完成。通过这种方式，我将了解各种做事方式，并可以在此过程中构建我的概念。

我在下面附上我的代码。这只是一个测试项目，其中一个列表视图有一列。

XAML：

<Window.Resources>
    <Prefs:Tables x:Key="TClass"></Prefs:Tables>
</Window.Resources>
<Grid>
    <StackPanel Orientation="Horizontal">
        <ListView Name="listView1" Background="Transparent" Height="534" BorderThickness="0 0 0 1" VerticalAlignment="Top">
            <ListView.ItemsSource>
                <Binding Source="{StaticResource TClass}" Path="Instance.dtAccounts" Mode="TwoWay"></Binding>
            </ListView.ItemsSource>
            <ListView.View>
                <GridView x:Name="GridView1" ColumnHeaderContainerStyle="{StaticResource GridViewHeader}" AllowsColumnReorder="True">
                    <GridViewColumn Header="Company Name">
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <TextBlock x:Name="txbName" Padding="0 0 5 0" >
                                    <TextBlock.Text>
                                    <Binding Path="NAME">

                                    </Binding>
                                        </TextBlock.Text>
                                </TextBlock>
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                </GridView>
            </ListView.View>
        </ListView>
        <StackPanel Name="stkPanel1" Margin="100 0 0 0">
            <TextBlock></TextBlock>
        </StackPanel>
    </StackPanel>
</Grid>

Window1.xaml.cs

public partial class Window1 : Window
{
    DataTable dt = new DataTable();
    public Window1()
    {
        InitializeComponent();
        Tables.Instance.dtAccounts = Worker.LoadAccounts();
    }

}

Class Tables.cs

public class Tables : INotifyPropertyChanged
{
    private static Tables instance;
    public event PropertyChangedEventHandler PropertyChanged = delegate { };
    private DataTable _dtAccounts;

    public Tables()
    {
    }

    // Singleton instance read-only property
    public static Tables Instance
    {
        get
        {
            if (instance == null)
            {
                instance = new Tables();
            }
            return instance;
        }
    }

    public DataTable dtAccounts
    {
        get
        {
            return _dtAccounts;
        }
        set
        {
            _dtAccounts = value;
            OnPropertyChanged("dtAccounts");
        }
    }

    private void OnPropertyChanged(string property)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(property));
        }
    } 
}

=====================

最终工作代码

我能够在菲尔提供的答案的帮助下做到这一点。在下面发布我的更新代码，因为它可能对其他人有用。

XAML：

<Grid>
    <StackPanel Orientation="Horizontal">
        <ListView Name="listView1" Background="Transparent" Height="534" BorderThickness="0 0 0 1" VerticalAlignment="Top" SelectionChanged="listView1_SelectionChanged">
            <ListView.ItemsSource>
                <Binding Source="{StaticResource TClass}" Path="Instance.dtAccounts" Mode="TwoWay"></Binding>
            </ListView.ItemsSource>
            <ListView.View>
                <GridView x:Name="GridView1" ColumnHeaderContainerStyle="{StaticResource GridViewHeader}" AllowsColumnReorder="True">
                    <GridViewColumn Header="Company Name">
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <TextBlock Name="txbName" Padding="0 0 5 0" >
                                    <TextBlock.Text>
                                    <Binding Path="NAME">

                                    </Binding>
                                        </TextBlock.Text>
                                </TextBlock>
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                </GridView>
            </ListView.View>
        </ListView>
        <StackPanel Name="stkPanel1" Margin="100 0 0 0">
            <TextBlock>
                <TextBlock.Text>
                    <Binding Source="{StaticResource TClass}" Path="Instance.SelectedName" Mode="TwoWay">

                    </Binding>
                </TextBlock.Text>
            </TextBlock>
        </StackPanel>
    </StackPanel>
</Grid>

Window1.xaml.cs

public partial class Window1 : Window
{
    DataTable dt = new DataTable();
    public Window1()
    {
        InitializeComponent();
        Tables.Instance.dtAccounts = Worker.LoadAccounts();
    }

    private void listView1_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        ListView lstView = sender as ListView;
        int item = lstView.SelectedIndex;
        Tables.Instance.SetSelectedRow(item);
    }
}

Tables.cs

public class Tables : INotifyPropertyChanged
{
    private static Tables instance;
    public event PropertyChangedEventHandler PropertyChanged = delegate { };
    private DataTable _dtAccounts;
    private string _selectedName;

    public Tables()
    {
    }

    // Singleton instance read-only property
    public static Tables Instance
    {
        get
        {
            if (instance == null)
            {
                instance = new Tables();
            }
            return instance;
        }
    }

    public DataTable dtAccounts
    {
        get
        {
            return _dtAccounts;
        }
        set
        {
            _dtAccounts = value;
            OnPropertyChanged("dtAccounts");
        }
    }

    public string SelectedName
    {
        get
        {
            return _selectedName;
        }
        set
        {
            _selectedName = value;
            OnPropertyChanged("SelectedName");
        }

    }

    public void SetSelectedRow(int index)
    {
        int indexNo = index;
        SelectedName = dtAccounts.Rows[index][0].ToString();
    }

    private void OnPropertyChanged(string property)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(property));
        }
    } 
}

Answer 1

以下是您可以实现此目标的基本描述。这不是一个理想的解决方案，但应该让你走上正确的轨道。

在Tables类中创建一个表示数据表中单行的字段变量。
在Tables类中创建一个方法，将该字段变量设置为表中的正确行。
创建公开行值的属性。
步骤＃2的方法需要对步骤＃3（OnPropertyChanged）中公开的所有属性进行更改通知。
处理后面代码中的selection_changed事件，并从该事件处理程序中调用Tables类中设置所选行的方法。
将文本块绑定到步骤＃3中公开的属性。

Answer 2

这是类似的事情：

public partial class DynamicListViewWindow : Window
{
    public DynamicListViewWindow()
    {
        InitializeComponent();

        ObservableCollection<Person> personList = new ObservableCollection<Person>();

        personList.Add(new Person() { FirstName = "John", LastName = "Doe", Age = 30, Address = "123 Doe Street", Phone = "111-111-1111" });
        personList.Add(new Person() { FirstName = "Jane", LastName = "Doe", Age = 28, Address = "123 Doe Street", Phone = "222-222-2222" });
        personList.Add(new Person() { FirstName = "Mark", LastName = "Doe", Age = 15, Address = "123 Doe Street", Phone = "333-333-3333" });
        personList.Add(new Person() { FirstName = "John", LastName = "Smith", Age = 40, Address = "123 Doe Street", Phone = "444-444-4444" });
        personList.Add(new Person() { FirstName = "Rosy", LastName = "Smith", Age = 36, Address = "123 Doe Street", Phone = "555-555-5555" });

        PersonListView.ItemsSource = personList;
    }

    private void PersonListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        if (PersonListView.SelectedIndex >= 0)
        {
            Object data = PersonListView.SelectedItem;
            PropertyInfo[] properties = data.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);

            ExtraPropertiesPanel.Children.Clear();

            foreach (PropertyInfo prop in properties)
            {
                TextBox tb = new TextBox();
                Binding b = new Binding() { Source = data, Path = new PropertyPath(prop.Name) };
                tb.SetBinding(TextBox.TextProperty, b);
                ExtraPropertiesPanel.Children.Add(tb);
            }
        }
    }
}

public class Person
{
    public String FirstName { get; set; }
    public String LastName { get; set; }
    public Int32 Age { get; set; }
    public String Address { get; set; }
    public String Phone { get; set; }
}

XAML

<Window x:Class="WPFApplication1.DynamicListViewWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window"
    Height="300"
    Width="300">
<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*" />
        <ColumnDefinition Width="*" />
    </Grid.ColumnDefinitions>
    <Border Grid.Column="0">
        <ListView Name="PersonListView" SelectionChanged="PersonListView_SelectionChanged">
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="First Name"
                                    DisplayMemberBinding="{Binding FirstName}" />
                    <GridViewColumn Header="Last Name"
                                    DisplayMemberBinding="{Binding LastName}" />
                </GridView>
            </ListView.View>
        </ListView>
    </Border>
    <Border Grid.Column="1">
        <StackPanel Name="ExtraPropertiesPanel"></StackPanel>
    </Border>
</Grid>

DataBinding到Listview

2 个答案: