.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

Patterns: WPF Apps With The Model-View-ViewModel Design Pattern

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

In this article we explain just how simple it can be to build a WPF application the right way using the MVVM Pattern.

Josh Smith

MSDN Magazine February 2009

View Complete Post

More Related Resource Links

Design Patterns: Problems and Solutions with Model-View-ViewModel


The Model-View-ViewModel (MVVM) design pattern describes a popular approach for building Windows Presentation Foundation or Microsoft Silverlight applications. Robert McCarter shows you how the ViewModel works, and discuss some benefits and issues involved in implementing a ViewModel in your code.

Robert McCarter

MSDN Magazine July 2010

Silverlight Patterns: Model-View-ViewModel In Silverlight 2 Apps


In this article, you'll learn how to avoid problematic tight coupling by applying the Model-View-ViewModel pattern in Silverlight 2.

Shawn Wildermuth

MSDN Magazine March 2009

Design Patterns: Model View Presenter


The MVP pattern helps you separate your logic and keep your UI layer free of clutter. This month learn how.

Jean-Paul Boodhoo

MSDN Magazine August 2006

Fully Embracing the Model-View-ViewModel Pattern in WPF

I'm trying to get my head around the M-V-VM pattern as it is used with WPF. So far I have been successful in implementing this pattern but it's perfect (yet). There are a number of common UI workflows that I can't figure out how to implement in this pattern such as:1. A user clicks a button that should show a modal dialog box. Usually the VM has a command on it that the button is bound to and something executes. However, what needs to execute is a UI behavior (opening the dialog box). The VM should not open the dialog box (that would be wrong because the VM now has to know something about the UI). The Window or UserControl or Page inwhich the command was initiated should open the dialog box.2. A user clicks a button that executes a command on a VM. However, this is a long-running command and I'd like to show the WaitCursor during this operation. This is a UI function, not a VM function. Should the VM fire an event? And if so, how does the Xaml handle it?So, M-V-VM experts out there, what am I missing? Help me to see the light...Dave

Design Patterns - Using the State Pattern in C#

What is the State Pattern?

The State Pattern is a behavioral pattern that can be used to alter the behavior of an object at run time. As the state of an object changes, the functionality of the object can change drastically. This change of behavior is hidden from the Client and the Client interfaces with a wrapper object known as the Context. The State Pattern is a dynamic version of the Strategy Pattern.

Design Patterns: Simplify Distributed System Design Using the Command Pattern, MSMQ, and .NET


Service-oriented architecture is a great framework when you need to perform distributed computing tasks over the Internet. But when you want to perform processing inside your local network, a different solution may provide a better fit. That solution, based on the Command pattern, uses Windows services and Microsoft Message Queuing to implement a queued system that meets your needs better than a service-oriented solution. This article explains how to build it.

Brad King

MSDN Magazine September 2004

Model View ViewModel question



I´m playing around with XAML and MVVM, and have a question about the wiring between the model and the viewmodel:

If I have a model that updates its data on random times, what wiring is used between the model and the viewmodel to let the viewmodel know that the model has changed?.

Between the view and viewmodel a bindings and NotifyPropertyChanged would take care of this.


Trying to learn

MVVM Bind View Details to Model Via ViewModel when a Button clicked.


I have model called Car with prperties name,model,type,year.

I have implemeted the Viewmodel with same properties with OnpropertyChangedEvent including model object type Property.

I have a view usercontrol where textboxes for name, model and for year a combobox.

Whenever i fill the view i want to save those details into model via view model

I have written ICommand  Save which calls SaveCarDetails defined in viewmodel,  which is bind to a button in view ,All other texboxes text is bind to the properties of viewmodel properties.

When i put break point at ICommand SaveCommand and SaveCarDetails Function i could see the values filled from view.

But when i bind these details to another user control where listbox is placed and its itemsource property is set to Car property nothing but model object defined in the viewmodel.

I couldn't see the values binding via viewmodel to model.

Where as if i bind to textboxes in the listview i could see the values because i it's a dependency property.

Can any one please tell me what is the wrong i am doing here.




Dialogs and ViewModel - Using Tasks as a Pattern

The ViewModel/MVVM pattern continues to gain popularity, with a blog post showing up every so often, and with tweets and retweets popping up even more often :-). At the same time, there are some interesting topics beyond the core pattern that continue to fuel experimentation. A big one amongst those is how should applications use dialogs when using the view model pattern.

The crux of the problem is the desire to keep the view model independent of UI concerns, and ensure it can be tested in a standalone manner, but that often comes to odds when you want the view model to launch a dialog, and/or do some work after the dialog is closed.

Prototype Design Pattern in C#. Vb.NET

Specify the kind of objects to create using a prototypical instance, and create new objects by copying this prototype

Adapter Design Pattern in C#, VB.NET

Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces.

Singleton Design Pattern in C#, Vb.NET

Ensure a class has only one instance and provide a global point of access to it.

Model View Controller (MVC) for ASP.NET

Model View Controller (MVC) architectures, immediately wonder how the MVC pattern can be applied in an ASP.NET world. This article will demonstrate how the MVC pattern can be applied to an ASP.NET web application and still maintain the basic Microsoft supplied architecture.

Solidify Your C# Application Architecture with Design Patterns

design pattern can solve many problems by providing a framework for building an application. Design patterns, which make the design process cleaner and more efficient, are especially well-suited for use in C# development because it is an object-oriented language. Existing design patterns make good templates for your objects, allowing you to build software faster. This article describes several popular design patterns you can use in your own applications, including the singleton, the decorator, the composite, and the state classes, which can improve the extensibility of your applications and the reuse of your objects.

What Are Design Patterns and Do I Need Them?

Software professionals may be familiar with the term "Design Patterns," but many have no idea of where they come from and what they truly are. Consequently, some do not see the value and benefits design patterns bring to the software development process, especially in the areas of maintenance and code reuse.

Design Patterns for .NET

It is not the intent of the Design Pattern Series to focus on providing a theoretical knowledge dump of all there is to know about design patterns. There are many books that do that already. Instead, this series will focus on providing lots of practical examples. However, there will be some theory to help address important points concerning design patterns. I use the theory of design patterns mostly as a guide and instead make references to good design pattern books for more detail explanation.
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend