列表视图绑定中的选定项

本文关键字：视图 绑定 列表 | 更新日期: 2023-09-27 18:36:11

我是WPF的新手。在我的示例应用程序中，我使用 ListView 来显示属性的内容。我不知道如何将列表视图中的选定项绑定到属性，然后绑定到文本块。

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();
        }

人.cs

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

感谢您的任何帮助。

列表视图绑定中的选定项

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

这可能是你的问题，你不应该像这样设置项目源。 只需替换为此行...

this.DataContext = this;

这就是将属性绑定到 UI 的内容，以便所有这些绑定语句都具有任何意义。

此外，还需要更新文本块上的绑定，以实际匹配 Person 类中属性的名称。

<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，才能在当前选择的人属性上实现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，这也有效，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）

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