Question

wpf combobox 页面上怎么绑定值

要实现的功能是 两个下拉列表动态联动 请高手吧代码写详细一点 我是新手

Answer 1

xaml:

<StackPanel Orientation="Horizontal">
<ComboBox Name="cb1" ItemsSource="{Binding}" Width="200" Height="30" SelectionChanged="Cb1_SelectionChanged">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Name}"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
<ComboBox Name="cb2" ItemsSource="{Binding}" Width="200" Height="30">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Name}"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
</StackPanel>

xaml.cs:

public MainWindow() //构造函数
{
InitializeComponent();

var provinces = new List<Province>
{
new Province
{
Name="山西省",
Cities = new List<City>
{
new City{Name="太原市"},new City{Name="大同市"},new City{Name="运城市"},new City{Name="榆次市"}
}
},
new Province
{
Name="陕西省",
Cities = new List<City>
{
new City{Name="西安市"},new City{Name="宝鸡市 "},new City{Name="渭南市 "},new City{Name="咸阳市 "}
}
}
};
cb1.DataContext = provinces;
}

private void Cb1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var combobox = sender as ComboBox;
if (combobox != null)
{
var province = combobox.SelectedItem as Province;
cb2.DataContext = province.Cities;
cb2.SelectedIndex = 0;
}
}
}

辅助类：

public class Province
{
public string Name { get; set; }

public List<City> Cities { get; set; }
}

public class City
{
public string Name { get; set; }
}

Answer 2

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