WPF绑定方式
绑定到其它元素
<Grid>
<StackPanel>
<TextBox x:Name="textbox1" />
<Label Content="{Binding ElementName=textbox1, Path=Text}" />
</StackPanel>
</Grid>
绑定元素事件
<i:Interaction.Triggers>
<i:EventTrigger EventName="Loaded">
<i:InvokeCommandAction Command="{Binding LoadedCommand}" CommandParameter="{Binding ElementName=window}" />
</i:EventTrigger>
</i:Interaction.Triggers>
public ICommand LoadedCommand {
get {
return new DelegateCommand<Window>(win => {
win.Closing += (sender, e) => {
if (MessageBox.Show("确认要关闭窗口吗?", "提示", MessageBoxButton.YesNo) == MessageBoxResult.No) {
e.Cancel = true;
}
};
});
}
}
绑定到静态资源
<Window.Resources>
<ContentControl x:Key="text">Hello, World!</ContentControl>
</Window.Resources>
<Grid>
<StackPanel>
<Label x:Name="label1" Content="{Binding Source={StaticResource text}}" />
</StackPanel>
</Grid>
<STRONG>3. 绑定到自身</STRONG>
<Grid>
<StackPanel>
<Label x:Name="label1" Content="{Binding RelativeSource={RelativeSource Self}, Path=Name}" />
</StackPanel>
</Grid>
绑定到指定类型的父元素
<Grid x:Name="Grid1">
<StackPanel>
<Label x:Name="label1" Content="{Binding RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type Grid}}, Path=Name}" />
</StackPanel>
</Grid>
绑定到对象
public class Person
{
public string Name { get; set; }
public int Age { get; set; }
}
<StackPanel x:Name="stackPanel">
<StackPanel.DataContext>
<local:Person Name="Jack" Age="30"></local:Person>
</StackPanel.DataContext>
<TextBlock Text="{Binding Path=Name}"></TextBlock>
<TextBlock Text="{Binding Path=Age}"></TextBlock>
</StackPanel>
绑定到集合
public class Person
{
public string Name { get; set; }
public int Age { get; set; }
}
public class PersonList : ObservableCollection<Person>
{ }
<Window.Resources>
<local:PersonList x:Key="person">
<local:Person Name="Jack" Age="30"></local:Person>
<local:Person Name="Tom" Age="32"></local:Person>
</local:PersonList>
</Window.Resources>
<StackPanel x:Name="stackPanel">
<ListBox ItemsSource="{Binding Source={StaticResource ResourceKey=person}}"
DisplayMemberPath="Name">
</ListBox>
</StackPanel>
DataContext共享源
我们需要将同一资源绑定到多个 UI 元素上,很显然到处写 "{Binding Source={StaticResource person}}" 是件很繁琐且不利于修改的做法。WPF 提供了一个称之为 "数据上下文 (DataContext)" 的东西让我们可以在多个元素上共享一个源对象,只需将其放到父元素 DataContext 属性即可。当我们不给 Binding 扩展标志指定 Source 属性时,它会自动寻找上级父元素的数据上下文。
<Window.Resources>
<local:PersonList x:Key="person">
<local:Person Name="Jack" Age="30"></local:Person>
<local:Person Name="Tom" Age="32"></local:Person>
</local:PersonList>
</Window.Resources>
<StackPanel x:Name="stackPanel" DataContext="{StaticResource person}">
<ListBox ItemsSource="{Binding}"
DisplayMemberPath="Name">
</ListBox>
</StackPanel>
使用XML作为Binding的源
XML:
<?xml version="1.0" encoding="utf-8" ?>
<PersonList>
<Person Id="1">
<Name>Jack</Name>
</Person>
<Person Id="2">
<Name>Tom</Name>
</Person>
<Person Id="3">
<Name>Justin</Name>
</Person>
<Person Id="4">
<Name>David</Name>
</Person>
</PersonList>
XAML:
<StackPanel>
<ListView x:Name="personListView">
<ListView.View>
<GridView>
<GridViewColumn Header="Id" Width="100"
DisplayMemberBinding="{Binding XPath=@Id}"/>
<GridViewColumn Header="Name" Width="100"
DisplayMemberBinding="{Binding XPath=Name}"/>
</GridView>
</ListView.View>
</ListView>
<Button Click="Button_Click">Load Data</Button>
</StackPanel>
private void Button_Click(object sender, RoutedEventArgs e)
{
XmlDocument xmlDocument = new XmlDocument();
xmlDocument.Load("Person.xml");
XmlDataProvider xdp = new XmlDataProvider();
xdp.Document = xmlDocument;
xdp.XPath = @"/PersonList/Person";
this.personListView.DataContext = xdp;
this.personListView.SetBinding(ListView.ItemsSourceProperty, new Binding());
}
【推荐】国内首个AI IDE,深度理解中文开发场景,立即下载体验Trae
【推荐】编程新体验,更懂你的AI,立即体验豆包MarsCode编程助手
【推荐】抖音旗下AI助手豆包,你的智能百科全书,全免费不限次数
【推荐】轻量又高性能的 SSH 工具 IShell:AI 加持,快人一步
· AI与.NET技术实操系列:基于图像分类模型对图像进行分类
· go语言实现终端里的倒计时
· 如何编写易于单元测试的代码
· 10年+ .NET Coder 心语,封装的思维:从隐藏、稳定开始理解其本质意义
· .NET Core 中如何实现缓存的预热?
· 25岁的心里话
· 闲置电脑爆改个人服务器(超详细) #公网映射 #Vmware虚拟网络编辑器
· 零经验选手,Compose 一天开发一款小游戏!
· 通过 API 将Deepseek响应流式内容输出到前端
· AI Agent开发,如何调用三方的API Function,是通过提示词来发起调用的吗