While exploring DI/IOC with Unity with WPF, I came across a question and need your feedback. Please consider the following scenario...
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public interface IDataServices
{
string GetData();
}
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public class CopyTextDataServices : IDataServices
{
public string GetData()
{
return "copy text from CopyTextDataServices";
}
}
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public class TextDataServices : IDataServices
{
public string GetData()
{
return "I am injected by setter property injection";
}
}
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public interface ITextViewModel
{
string LabelContnet { get; set; }
}
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public class TextViewModel : ITextViewModel
{
public TextViewModel()
{
LabelContnet = "This is from view model";
}
public string LabelContnet { get; set; }
}
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public partial class MainWindow : Window
{
public MainWindow(ITextViewModel textViewModel)
{
InitializeComponent();
Loaded += MainWindow_Loaded;
DataContext = textViewModel;
}
[Dependency]
public IDataServices Services { get; set; }
containing the event data.</param>
private void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
LabelLeft.Content = Services.GetData();
}
}
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public partial class App : Application
{
protected override void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
IUnityContainer container = new UnityContainer();
container.RegisterType<IDataServices, TextDataServices>();
container.RegisterType<IDataServices, CopyTextDataServices>();
container.RegisterType<ITextViewModel, TextViewModel>();
var window = container.Resolve<MainWindow>();
window.Show();
}
}
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<Window x:Class="TestAppWPF.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525" FontSize="20">
<StackPanel>
<Label Content="{Binding Path=LabelContnet,FallbackValue=Left}" HorizontalAlignment="Left" Name="LabelLeft" />
<Label Content="{Binding Path=LabelContnet,FallbackValue=Right}" HorizontalAlignment="Left" Name="LabelRight" />
</StackPanel>
</Window>
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Now the result of this appears in the labels is
copy text from CopyTextDataServices
This is from view model
But I want to know if I want to get data from TextDataServices, how can I do that?