c# - ListView 绑定(bind)中的 SelectedItem

Question

我是 WPF 新手。在我的示例应用程序中，我使用 ListView 来显示属性的内容。我不知道如何将 ListView 中的 SelectedItem 绑定(bind)到属性，然后再绑定(bind)到 TextBlock。

Window.xaml

<Window x:Class="Exec.App"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Main window" Height="446" Width="475" >

    <Grid>
        <ListView Name="ListViewPersonDetails" Margin="15,12,29,196" ItemsSource="{Binding Persons}" SelectedItem="{Binding CurrentSelectedPerson}">
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="First name" DisplayMemberBinding="{Binding FirstName}"/>
                    <GridViewColumn Header="Last name" DisplayMemberBinding="{Binding LastName}"/>
                    <GridViewColumn Header="Address" DisplayMemberBinding="{Binding Address}"/>
                </GridView>
            </ListView.View>
        </ListView>

        <TextBlock Height="23" Name="textFirstNameBlock" FontSize="12" Margin="97,240,155,144">
                <Run Text="Name: " />
                <Run Text="{Binding CurrentSelectedPerson.FirstName}" FontWeight="Bold" />
        </TextBlock>

        <TextBlock Height="23" Name="textLastNameBlock" FontSize="12" Margin="97,263,155,121">
                <Run Text="Branch: " />
                <Run Text="{Binding CurrentSelectedPerson.LastName}" FontWeight="Bold" />
        </TextBlock>

        <TextBlock Height="23" Name="textAddressBlock" FontSize="12" Margin="0,281,155,103" HorizontalAlignment="Right" Width="138">
                <Run Text="City: " />
                <Run Text="{Binding CurrentSelectedPerson.Address}" FontWeight="Bold" />
        </TextBlock>

    </Grid>
</Window>

MainWindow.xaml.cs

Tman manager = new Tman();

        private List<Person> persons;
        public List<Person> Persons
        {
            get
            {
                return this.persons;
            }

            set
            {
                if (value != null)
                {
                    this.persons = value;
                }

            }
        }

        private Person currentSelectedPerson;
        public Person CurrentSelectedPerson
        {
            get
            {
                return currentSelectedPerson;
            }
            set
            {
                this.currentSelectedPerson = value;
            }
        }


        private void Window_Loaded(object sender, RoutedEventArgs e){   
            ListViewPersonDetails.ItemsSource= manager.GetPersons();

        }

Person.cs

class Person
    {
        public string FirstName
        {
            get;
            set;
        }

        public string LastName
        {
            get;
            set;
        }

        public string Address
        {
            get;
            set;
        }

    }

感谢您的帮助。

Answer 1

private void Window_Loaded(object sender, RoutedEventArgs e){
    ListViewPersonDetails.ItemsSource= manager.GetPersons();
}

这可能是您的问题，您不必像这样设置项目源。只需替换为这一行...

this.DataContext = this;

这就是将您的属性绑定(bind)到 UI 的内容，因此所有这些绑定(bind)语句都具有任何意义。

您还需要更新文本 block 上的绑定(bind)以实际匹配 Person 类中的属性名称。

<TextBlock Height="23" Name="textFirstNameBlock" FontSize="12" Margin="97,240,155,144">
    <Run Text="Name: " />
    <Run Text="{Binding CurrentSelectedPerson.FirstName}" FontWeight="Bold" />
</TextBlock>

<TextBlock Height="23" Name="textLastNameBlock" FontSize="12" Margin="97,263,155,121">
    <Run Text="Branch: " />
    <Run Text="{Binding CurrentSelectedPerson.LastName}" FontWeight="Bold" />
</TextBlock>

<TextBlock Height="23" Name="textAddressBlock" FontSize="12" Margin="0,281,155,103" HorizontalAlignment="Right" Width="138">
    <Run Text="City: " />
    <Run Text="{Binding CurrentSelectedPerson.Address}" FontWeight="Bold" />
</TextBlock>

编辑:

在 VS 中测试，您还需要 1 个小东西，以在 CurrentSelectedPerson 属性上实现 INotifyPropertyChanged...

private Person currentSelectedPerson;
public Person CurrentSelectedPerson 
{
    get { return currentSelectedPerson; }
    set 
    {
        currentSelectedPerson = value;
        if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("CurrentSelectedPerson"));
    }
}

作为替代方案，这也可行，更简单一些......

<TextBlock Height="23" Name="textFirstNameBlock" FontSize="12" Margin="97,240,155,144">
    <Run Text="Name: " />
    <Run Text="{Binding ElementName=ListViewPersonDetails, Path=SelectedItem.FirstName}" FontWeight="Bold" />
</TextBlock>

(对其他文本框重复类似的逻辑)