MVVM Dialogs: Showing Dialogs in an MVVM Application with a Dialog Service
In this video, I answer the question "How do I show Dialogs in an MVVM application?"
Showing dialogs in an MVVM application is a very common requirement. MVVM dialogs are actually core to any MVVM application. In this video, I show you how to use an MVVM Dialog Service to abstract away the process of creating and showing dialog objects from within a ViewModel.
The first step in showing dialogs in an MVVM application is to create an interface that defines your Dialog Service. For example
public interface IDialogService
{
void ShowDialog()
}
Next you need to create a class that implements your MVVM Dialog Service.
public class DialogService : IDialogService
{
public void ShowDialog() { ... }
}
Once created you would use this service in your ViewModel to show your MVVM dialogs
IDialogService dialogService = new DialogService()
dialogService.ShowDialog()
In this video, I will walk you through each step reuired to implement a proper MVVM Dialog Service.
We will cover:
Creating the MVVM Dialog Service
Showing dialogs using names
Handling Dynamic Dialog Window content
Responding to closing the Dialog within your ViewModel
Passing data to your ViewModel when you close the dialog
Registering ViewModels with your Dialogs
Showing dialogs using a ViewModel Type instead of a name
00:00 - Intro
01:16 - The Demo App
02:54 - Creating the Dialog Service
05:52 - Dynamic Window Content
09:20 - Closing Dialogs with Parameters
14:39 - Strongly Typed Dialogs
21:24 - Automatically creating and assigning Data Context
23:53 - Summary
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