IocServiceProvider Class

A global wrapper for an application service provider that enables dependency injection in the DevExpress MVVM framework.

Namespace: DevExpress.Mvvm

Assembly: DevExpress.Mvvm.v26.1.dll

Declaration

C#

public sealed class IocServiceProvider :
    IServiceProvider

VB.NET

Public NotInheritable Class IocServiceProvider
    Implements IServiceProvider

Related API Members

The following members return IocServiceProvider objects:

• IocServiceProvider.Default

Remarks

Configure the application dependency injection container at startup and assign it to the IocServiceProvider.Default service. The IocExtension can resolve MainViewModel from XAML during initialization:

App.xaml.cs

using DevExpress.Mvvm;
using Microsoft.Extensions.DependencyInjection;
using MvvmApp.ViewModels;

namespace MvvmApp {
    public partial class App : Application {
        // ...
        protected override void OnStartup(StartupEventArgs e) {
            IServiceProvider services = new ServiceCollection()
                .AddTransient<MainViewModel>()
                .BuildServiceProvider();
            // Configure the global provider before WPF starts loading StartupUri/XAML
            // The {dxmvvm:Ioc ...} config can resolve types during initialization in XAML
            IocServiceProvider.Default.ConfigureServices(services);
            base.OnStartup(e);

            var mainWindow = new MainWindow();
            MainWindow = mainWindow;
            mainWindow.Show();
        }
    }
}

Declare a MainViewModel class with a read-only Message property that contains text for UI binding:

MainViewModel.cs

namespace MvvmApp.ViewModels {
    public sealed class MainViewModel {
        public string Message { get; } = "DI works through the IocExtension";
    }
}

Use the IocExtension to resolve a MainViewModel from the configured Dependency Injection container. The window sets the resolved MainViewModel instance as DataContext, so the TextBlock can bind to the Message property:

MainWindow.xaml

<dx:ThemedWindow
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"
    xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm"
    xmlns:vm="clr-namespace:MvvmApp.ViewModels"

    DataContext="{dxmvvm:Ioc Type={x:Type vm:MainViewModel}}">

    <Grid>
        <TextBlock Text="{Binding Message}"/>
    </Grid>
</dx:ThemedWindow>

Inheritance

Object

IocServiceProvider