Soa. .NET. Specification. Tree. A Modified Snapshot Pattern - Jeff Perrin - Sexier Than You Are. I thought I'd share a solution and ideas around a problem that seems to come up from time to time in past systems I've built. I'll walk you through the implementation of a modified Snapshot Pattern in C#. First off, what is the Snapshot pattern, and why would we use it? Put simply, a Snapshot is the concept of giving date/time context to an object, so that a current time period is factored in to any queries or commands we send to it. Here's an example of a simple problem that it can solve: Say we have a Product object, which generically represents something that a person can purchase from an online store.
The following diagram shows us how we want the code to end up looking: There are three main objects that form the backbone of our modified Snapshot pattern: Master: This object is persistent, and holds any data that does not change over time. Our code for the Product scenario ends up looking like so: ProductMaster.cs ProductDetail.cs Product.cs Hopefully this makes sense. Design Patterns for .Net. An Undo/Redo Buffer Framework. Free source code and programming. Download source - 2.01 Kb Introduction An undo/redo feature is a "must-have" in today's applications. In conjunction with the Memento design pattern that I discuss here, it is very easy to implement. Throughout this article, I will be illustrating how an undo/redo buffer works using the example of an RPN calculator stack. Architecture An undo/redo buffer primarily implements three methods: Do Undo Redo The Do Method This method records the current state, and this is very important, before the action takes place, as illustrated by this diagram: As illustrated, "state1" is preserved prior to performing the action, which in this case is "Enter".
Let's look at a second action, "Add": Again, the current state is saved before the action, in this case an "Add" is taken. The Undo Method The undo method has a complexity to it--before performing the undo, the current state, if at the top of the undo buffer, must be preserved. By pushing state4, we can now redo our last action. The Redo Method Implementation. Design Patterns | Object Oriented Design. J.D. Meier's Blog : Cheat Sheet: patterns & practices P. As part of our patterns & practices Application Architecture Guide 2.0 project, we've been hunting and gathering our patterns from across our patterns & practices catalog.
Here's an initial draft of our patterns & practices Patterns Catalog at a Glance: Cheat Sheet: patterns & practices Patterns Catalog (CodePlex) Pattern Catalog To collect the patterns, we first identified the key projects that focused on patterns: Next, we organized the patterns and summarized in tables. You can browse the tables below to see which patterns are associated with which project.
Composite Application Guidance for WPF Data Patterns Enterprise Solution Patterns Integration Patterns Web Services Security Patterns Pattern Summaries The following pattern summaries are brief descriptions of each pattern, along with a link to the relevant MSDN pages. Modularity Service Locator. Testability Dependency Injection. Data Movement Patterns Data Replication. Deployment Patterns Deployment Plan. Distributed Systems Broker.
IntPatt.pdf (application/pdf Object) Integration Patterns. Integration Patterns patterns & practices Developer Center Shop for patterns and practices books online [Content link no longer available, original URL: Principal Authors: David Trowbridge, Microsoft Platform Architecture Guidance; Ulrich Roxburgh, Microsoft Service Line Architect (Australia); Gregor Hohpe, Dragos Manolescu, ThoughtWorks, Inc.; E. G. Nadhan, EDS. Contributing Authors: Ward Cunningham, Microsoft Platform Architecture Guidance; Ramkumar Kothandaraman, Microsoft Developer and Platform Evangelism Architecture Strategy Team; Bill McDonald, Robert Miles, Ascentium Corporation; Javier Mariscal, Two Connect, Inc.; Raymond Laghaeian, Implement.Com. Microsoft Corporation June 2004 Summary Integration Patterns explains how patterns were used to design and build an integration architecture within a representative customer scenario.
Contents IntroductionWho Should Read This GuideWhat Is in This GuideFeedback and SupportContributors Introduction Bibliography. Patterns in Practice: Object Role Stereotypes. Chain.NET (a.k.a. NChain) - Overview. Patterns. MSDN Library Design Tools Development Tools and Languages Mobile and Embedded Development Online Services patterns & practices Servers and Enterprise Development Web Development 151 out of 301 rated this helpful - Rate this topic This content has been moved to the patterns & practices landing page. Did you find this helpful? Tell us more... (1500 characters remaining) Thank you for your feedback Show: © 2014 Microsoft. Extreme ASP.NET: Web Client Software Factory -- MSDN Magazine, A. Extreme ASP.NET Web Client Software Factory Fritz Onion One of the first steps in building a long-lived ASP.NET project is to define standards for how to use the many features of the platform. Without such standards, it is easy for the project to degenerate into a jumble of different development techniques and styles.
Enforcing these standards for developing applications can be difficult, however, due to the lack of tools. This is precisely the problem that the patterns & practices team at Microsoft set out to solve with the Web Client Software Factory. What Is a Software Factory? Before I delve into the details of what the Web Client Software Factory provides, it makes sense to describe what a software factory is. While a software factory may sound like a single component you could incorporate into a project, it actually describes an entire collection of assets you can use in developing applications with a specific technology.
Composite Web Application Block Figure 2 Project Layout.