ViewModelLocator Class

Locates and creates ViewModel instances for views by naming conventions and configured assemblies.

Namespace: DevExpress.Mvvm

Assembly: DevExpress.Mvvm.v26.1.dll

Declaration

C#

public class ViewModelLocator :
    LocatorBase,
    IViewModelLocator

VB.NET

Public Class ViewModelLocator
    Inherits LocatorBase
    Implements IViewModelLocator

Remarks

Configure the ViewModelLocator to set up MainWindow data binding:

App.xaml.cs

using System;
using System.Windows;
using DevExpress.Mvvm;

namespace MvvmApp {
    public partial class App : Application {
        protected override void OnStartup(StartupEventArgs e)
        {
            var locator = new ViewModelLocator(typeof(App).Assembly);
            ViewModelLocator.Default = locator;

            var window = new MainWindow();

            var vmType = locator.ResolveViewModelType(typeof(MainViewModel).FullName!);
            window.DataContext = Activator.CreateInstance(vmType ?? typeof(MainViewModel));

            MainWindow = window;
            window.Show();
            base.OnStartup(e);
        }
    }
}

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

MainViewModel.cs

namespace MvvmApp.ViewModels {
    public sealed class MainViewModel {
        public string Header => "Hello from ViewModelLocator";
    }
}

Inheritance

Object

DevExpress.Mvvm.LocatorBase

ViewModelLocator