Prism 4.1 - Developer's Guide to Microsoft Prism. Patterns & practices Developer Center February 2012 Prism provides guidance designed to help you more easily design and build rich, flexible, and easily maintained Windows Presentation Foundation (WPF) desktop applications, Silverlight Rich Internet Applications (RIAs), and Windows Phone 7 applications. Using design patterns that embody important architectural design principles, such as separation of concerns and loose coupling, Prism helps you to design and build applications using loosely coupled components that can evolve independently but which can be easily and seamlessly integrated into the overall application. These types of applications are known as composite applications.
Prism is intended for software developers building WPF or Silverlight applications that typically feature multiple screens, rich user interaction and data visualization, and that embody significant presentation and business logic. Before you can use the Prism Library, the following must be installed: Understand MVVM Using PRISM by Hello World Silverlight Application. Download demo project - 4.59 MB Introduction In this article I will try to use couple of different pieces of functionality which PRISM offers us to implement MVVM.
I am trying my best to start it from scratch for newbie. I prefer if you are really interested please try to develop your sample MVVM Silverlight application while reading the article side by side in order to understand it in detail. I strongly suggest if you don’t have basic understanding of UI pattern please go through this article once. In this post I am developing a clean MVVM pattern architecture for "Hello world" Silverlight application. Prism is more than MVVM PRISM can be interesting to you because it's more than an implementing MVVM framework. If you wanted to explore more about PRISM here is the link for that In this article I am developing "Hello World" Silverlight application using Prism.
In this article we will have two different views. Let’s start from scratch. Done. How to: Provide a Custom Logger. The Composite Application Library is designed to log messages throughout the library. To do this logging in a way that is not tied to a specific logging library, the Composite Application Library uses a logging façade, ILoggerFacade, to log its messages.
This interface contains a single method named Log that logs messages. By default, the UnityBootstrapper sets a default TraceLogger as the designated logger, but this can easily be replaced for your application. This topic describes the general steps that you should follow to use a different logger in your application that uses the Composite Application Library. For an example of how to provide a custom logger, see the Stock Trader Reference Implementation (Stock Trader RI). The Stock Trader RI uses the Enterprise Library Logging Application Block. This topic assumes that you already have a solution based on the Composite Application Library. To plug-in a custom logger in an application that uses the Composite Application Library. Prism 4 ILoggerFacade for Log4Net. PRISM and WPF how to add a module on demand. MVVM with Prism 101 – Part 1: The Bootstrapper. MVVM with Prism 101 – Part 1: The Bootstrapper Source Code I recently spoke at a CodeCamp put on by the Northern Utah .NET User Group (NUNUG) on implementing MVVM using Prism.
I hadn’t spoken in a long time and so I was over prepared – way over prepared. Then to top in off in my nervousness, I blew the whole presentation by starting 15 minutes late. I was the session after lunch and I assumed lunch was an hour, so I mistakenly assumed my session started at 1:00 PM. Embarrassing stories aside, I really learned a lot more about Prism and Silverlight and what an enterprise-class implementation of Prism looks like. Before I get started I would like to just make a short comment about MVVM. The View-Model is a composite of the abstraction of you view’s state and behavior.
The reason for this and why it is possible has a strong tie to the way data biding works in WPF/Silverlight. Once you get MVVM it will become second nature to you. Bootstrapper 5: bootstrapper.Run(); Setup ModuleCatalog. Introduction to Composite WPF (CAL, Prism): Part 2. Download demo - 392 KB Introduction Welcome to Part 2. If you have just landed on this article, you may want to pop off and read Part 1 first, here. In Part 1, we went through the basics of some thinking you may want to do before starting on a CAL based application. We covered off the basics of what CAL brings to the table and how to go about structuring the foundations of a CompositeWPF application. Some of the other topics included how to go about compositing the application together in the dev environment and how to go about planning some aspects of coordinating the overall development effort.
What is Happening in Part 2? With this article, I'm going to build on (literally) what was covered in Part 1. . ; anyway ... So, here is a run down of what's going to be covered in this article: Asynchronous Service Calls Master/Detail WPF Data Binding User Settings Management External Styling DLLs Dynamic Skin DLL Discovery and Loading (CAL Stylee!) New Modules for Part 2 Asynchronous Service Calls. Introduction to Composite WPF (CAL, Prism): Part 1. Download demo - 731 KB Introduction If you're a WPF application developer, you've probably heard about CAL by now. It seems to have a number of names that people know it by, CompositeWPF, Composite Application Library, Composite Application Guidance (CAG), and Prism.
Frankly, it's all a bit mad; from here on in, it's called CAL. Unlike the growing issue of loads of different techs that essentially do the same thing, here we have a single tech with loads of different names! Anyway, I have now been involved in two large Composite WPF applications. I'll dispense with the long waffly explanation of what it is, suffice to say that primarily, it is a library incorporating the following feature set: Modularity Dependency Injection Container (IoC) ObjectBuilder2 Event Aggregation Runtime Discovery/Static/Explicit Module Enumeration Before CAL arrived, I had already made a start on the two applications I referred to earlier. I guess this paints a favourable picture all in all. Shell ModuleA. CAL: Beginners guide to Modular applications: Part 1 of n. Download source code - 36.7 KB Introduction There are a lot of great articles about Composite; as an example, the Calcium articles from Daniel Vaughan, which are great, well documented, well implemented, etc...
But, are very complex, and I have seen a lot of people that have dropped the study of this amazing technology because of the complexity of the articles available. Well, this is a bit of a problem, right? Great technologies should make our life easier, not bring so much complexity that we have to spend days and nights to get the point. Composite has a beautiful purpose, and despite what has been painted about it, it is very simple to understand and to put it to work properly; so now is the time for let the small talk behind and look upon the future of WPF and Silverlight applications.
Summary Since this is a part 1 of n, the content of this article set can vary, but my intension is to follow this sequence: Pre-requisites Hands-on CALient.Core Let's create our solution. Great. Run it again. Getting Started with Prism 2.1 for WPF. Download demo - 1.81 MB Introduction This article updates and replaces my earlier article on Prism 1.0 (more formally known as the Composite Application Library, or ‘the CAL'). The major change in this article is the use of Prism 2.1, and a more detailed explanation of how the application is set up.
I have left the older article in place for those still using Prism 1.0. What is Prism? Prism is a framework for creating composite applications using WPF or Silverlight. Why a Composite Application? Composite apps were originally developed to help enterprise customers integrate multiple legacy apps into a single user interface, creating the appearance of an integrated system. It wasn't long before architects and developers recognized that composite applications provide definite advantages in building traditional desktop applications. Modules can be assigned to different development groups and developed more-or-less independently. About this Article Your Comments are Welcome The Demo Application. Composite WPF Display-on-Demand. Download demo project - 375.15 KB Introduction Note: This article has been superceded by Getting Started with Prism 2.1 for WPF, which covers the same ground in more detail. This article remains for those still using Prism 1.0.
In June 2008, Microsoft released version 1.0 of Composite Client Application Guidance, which provides a framework for developing composite applications in WPF. In February 2009, Microsoft released version 2.0, which extends the framework to Silverlight. Most of the Quickstarts and sample applications that ship with Prism implicitly assume that all modules are loaded at startup and are displayed immediately and continuously. Prism, built as it is on the idea of loosely-coupled modules, would seem to be ideal for this sort of UI. This article assumes that you have a basic understanding of Prism and ‘inversion of control containers’, on which Prism depends. The Problem The problem that this article will address is: How do you show and hide module views in C# code? Composite Application Library in WPF Application.
Download source - 255.27 KB Introduction Starting development of an application with a complex user interface, we always face the same problems: how to organize data presentation, change views, route events, share resources and so on. Badly planned project structure leads to a headache and extensive rework. That's why before starting a big project, I'd like to make a prototype of a WPF-based solution and share my small experience with you.
Developing an application, we confront increasing complexity - the more controls, views, menus we add, the more tangled application architecture becomes. And one fine day we understand that it is easy to throw away all we've done before, than add yet another module. Sounds good, but if you have just decided to use the Composite Application Library, the next question you ask yourself is: "well, samples work fine, but how can I build something more realistic? " I decided to create a small application emulating work with a few servers. Project Structure Menus. Simple Prism Application Templates. Download Simple Prism Templates - 867 KB Introduction This article describes a set of templates that I have written which are intended to help create simple WPF applications based on the Composite WPF Framework using the Prism libraries.
Why write these templates when there are already templates available, e.g., Calcium? This is a very valid question. There are a number of reasons. How many times do you have the need to create a simple application either at work or home? This could be a small utility you are creating, a prototype application to prove some new functionality / concept, or some code just to experiment with Prism etc. What I need are a couple of VSTemplates that would allow me to create a Prism based application quickly and which will have a common format, e.g., Shell, Infrastructure, and modules that I could create quickly and that I could quickly instantiate, enabling me to focus on the task at hand.
The two VSTemplates described in this application provide just that. Usage. Event Aggregator. Channel events from multiple objects into a single object to simplify registration for clients. A system with lots of objects can lead to complexities when a client wants to subscribe to events. The client has to find and register for each object individually, if each object has multiple events then each event requires a separate subscription. An Event Aggregator acts as a single source of events for many objects.
It registers for all the events of the many objects allowing clients to register with just the aggregator. How it Works An Event Aggregator is a simple element of indirection. The simplest Event Aggregator aggregates events from multiple objects into itself, passing that same event onto its observers. Since an Event Aggregator is based around observer, it's important to take into account all of the danger areas with observer. When to use it Event Aggregator is a good choice when you have lots of objects that are potential event sources. Further Reading Figure 1: Consultant class. Introduction to Prism - Composite Application Library (CAL) for WPF and Silverlight.
Introduction Prism (Composite Application Guidance for WPF and Silverlight) is designed to build applications in WPF and Silverlight that have a single code base. It helps to develop the client application in a modular fashion so that complexity of a large application can be divided in to simpler modules. Note: Please download Composite Application Library (CAL) from Architecture: Following diagram shows basic architecture that I am going to explain: App.XAML: Call BootStrapper on Application_StartupBootStrapper: This is a class file that calls Shell (Shell.XAML) and so creates catalogue of module.Shell: This is like a Master Page having regions.Region: It is like placeholders to register views.View: This is XAML file having User InterfaceModule: Each module can have one or more View(s) which are registered to Region (in the Shell) through RegionManager Step 1: Create Silverlight Application Step 2: Add CAL references to Silverlight Application.