这里是方法:
private void Capitales_SelectedChanged(object sender, RoutedEventArgs e)
{
string s = Capitales.SelectedItem.ToString();
tb.Text = "Selection: " + s;
}
我正在组合框中放置一个列表,当我编译程序时,文本框将显示下一个:ComboBox_MicroDocu.MainWindow + Ciudades,其中“ Ciudades”引用了我的课程。
您正在像使用Winform一样编写WPF应用。这可以工作,但是有更好的方法。使用MVVM(模型视图ViewModel)。MVVM很棒,因为它使您可以将视图(xaml)与业务逻辑(viewModels)分离。它对于可测试性也很棒。在此处https://www.tutorialspoint.com/mvvm/index.htm
中查看一些好的资源这就是您的代码的外观:
MainWindow.xaml
<Window x:Class="WpfApp1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApp1"
mc:Ignorable="d"
Title="MainWindow" >
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<ComboBox Grid.Column="0" ItemsSource="{Binding Elements}" SelectedItem="{Binding SelectedElement}"/>
<TextBox Grid.Column="1" Text="{Binding SelectedElement}"/>
</Grid>
</Window>
MainWindow.xaml.cs
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
this.DataContext = new ViewModel();
}
}
ViewModel.cs
public class ViewModel : INotifyPropertyChanged
{
private string _selectedElement;
public IEnumerable<string> Elements
{
get
{
for(int i = 0; i < 10; i++)
{
yield return $"Element_{i}";
}
}
}
public string SelectedElement
{
get
{
return _selectedElement;
}
set
{
_selectedElement = value;
RaisePropertyChanged();
}
}
private void RaisePropertyChanged([CallerMemberName] String propertyName = "")
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
public event PropertyChangedEventHandler PropertyChanged;
}