DevForce使Entity Framework能夠?yàn)榭蛻舳斯芾矶鄬邮郊軜?gòu)和移動(dòng)業(yè)務(wù)對(duì)象，從而極大地提高了應(yīng)用程序的響應(yīng)速度和可擴(kuò)展性，同時(shí)還允許離線操作。它繼承了2001年DevForce Classic的大多數(shù)特征和我們所有的經(jīng)驗(yàn)。

為什么需要DevForce?

• 基于多層的基礎(chǔ)結(jié)構(gòu)
  多層式架構(gòu)數(shù)據(jù)存取是很困難的。而為您的數(shù)據(jù)構(gòu)建遠(yuǎn)程域模型同樣是很困難的。但DevForce卻簡化了多層式架構(gòu)的持久化能力并且還提供了一個(gè)豐富的域模型，來建立您的應(yīng)用程序。您不需要編寫管道和基礎(chǔ)結(jié)構(gòu)代碼，只需專注于業(yè)務(wù)邏輯和用戶體驗(yàn)。
• 單個(gè)域模型
  您不用在多個(gè)地方重復(fù)您的業(yè)務(wù)邏輯。無論您是在編寫客戶端、服務(wù)器端程序，或是在應(yīng)用程序中采用不同技術(shù)（WPF, WinForms, ASP.NET或 Silverlight*）而面臨許多問題，DevForce的移動(dòng)業(yè)務(wù)對(duì)象都能讓您只使用一個(gè)單一的域模型 。
• 豐富的域模型
  DevForce確實(shí)可以為您提供豐富的業(yè)務(wù)對(duì)象。使用一個(gè)能夠表現(xiàn)您問題的域模型，它不只是單一的數(shù)據(jù)傳輸對(duì)象，因?yàn)樵谀莾耗€必須做好所有的簿記和重新實(shí)施您的業(yè)務(wù)邏輯。
• 驗(yàn)證引擎
  驗(yàn)證您業(yè)務(wù)對(duì)象的正確性并給用戶提供有用的錯(cuò)誤信息提示。支持交叉區(qū)和跨對(duì)象審定。讓您的業(yè)務(wù)邏輯保持在業(yè)務(wù)對(duì)象范圍內(nèi)而脫離用戶界面。
• 離線操作
  在斷開或部分連接互聯(lián)網(wǎng)時(shí)可繼續(xù)使用您的應(yīng)用程序。將您的工作保存在一個(gè)單獨(dú)的存儲(chǔ)器中并在恢復(fù)后繼續(xù)您的工作。
• Web 服務(wù)
  在您的應(yīng)用程序中還支持其他的服務(wù)。DevForce可以在支持的業(yè)務(wù)對(duì)象上創(chuàng)建web服務(wù)，使您可以將他們集成到您的域模型中。
• 實(shí)體框架集成
  微軟的下一代ORM框架必須實(shí)現(xiàn)標(biāo)準(zhǔn)化。DevForce是建立在Entity Framework之上的，使它能夠達(dá)到多層式架構(gòu)，從而更易于使用，同時(shí)還可添加你在這里看到的所有特性，甚至于更多。
• 響應(yīng)能力
  DevForce應(yīng)用程序響應(yīng)是很敏捷的。域模型如在客戶端運(yùn)行，那么客戶端緩存將減少訪問服務(wù)器的次數(shù)，數(shù)據(jù)壓縮則能減少網(wǎng)絡(luò)的延遲，還允許后臺(tái)處理異步查詢功能。
• 完整的N-TierLINQ支持
  在一個(gè)多層式架構(gòu)的應(yīng)用程序中，可以實(shí)現(xiàn)強(qiáng)大的LINQ功能。LINQ-to-Entities僅管理2層，而其他LINQ僅支持小范圍的查詢。與之相比，DevForce支持其所有。
• 多種數(shù)據(jù)源
  在一個(gè)單個(gè)的域模型中使用多個(gè)后臺(tái)的數(shù)據(jù)庫。使用對(duì)象屬性瀏覽交叉數(shù)據(jù)庫的關(guān)系。在一個(gè)分布式任務(wù)中，安全地保存您所有的修改。
• 可擴(kuò)展性
  客戶端緩存，連接池，以及無狀態(tài)和多核服務(wù)器，都為DevFroce應(yīng)用程序提供了完美的可擴(kuò)展性和容錯(cuò)性。
• 安全性
  在客戶端上，連接的字符串是隱藏的。即使客戶端已受到損害，服務(wù)器端的安全檢查仍會(huì)阻止未授權(quán)的訪問。
• 支持WinForms數(shù)據(jù)綁定
  先進(jìn)的數(shù)據(jù)綁定接口，可與.NET控件協(xié)同工作，除此之外還有Infragistics 和DevExpress。自動(dòng)填入窗體控件，然后根據(jù)您的需求進(jìn)行自定義。
• 最優(yōu)方法
  DevForce是建立在良好的設(shè)計(jì)方法之上的，如MVC與MWM。它能使您方便地將您的UI和業(yè)務(wù)邏輯保存在它們所屬的位置而不損失其易用性和功能特性。

DevForce enables the Entity Framework to operate n-tier and move business objects to the client, dramatically improving application responsiveness and scalability, while allowing offline operation. It carries forward most of the features and all of our experience from DevForce Classic dating back to 2001.

Why DevForce?

• Infrastructure for Multi-tier
  N-tier data access is hard. Constructing a remote domain model for your data is hard. DevForce simplifies n-tier persistence and provides a rich domain model on which to build your application. Stop writing plumbing and infrastructure code and focus on your business logic and user experience.
• Single Domain Model
  You shouldn抰 have to duplicate your business logic in multiple places. The mobile business objects in DevForce enable you to use a single domain model whether you are writing client-side, server-side, or have multiple faces for the application in different technologies such as WPF, WinForms, ASP.NET, or Silverlight*.
• Rich Domain Model
  DevForce provides you with rich business objects with real behavior. Use a domain model that represents your problem, not just flat data transfer objects, where you have to do all the bookkeeping and re-implement your logic.
• Verification Engine
  Verify the correctness of your business objects and provide helpful error messages to the user. Supports cross-field and cross-object validation. Keeps your business logic in your business objects and out of the UI.
• Offline Execution
  Use your application while disconnected or partially connected to the internet. Save your work in isolated storage and resume working later.
• Web Services
  Consume other services in your application. DevForce can create web-service backed business objects allowing you to integrate them into your domain model.
• Entity Framework Integration
  Standardize on Microsoft's next generation ORM framework. DevForce is built upon the Entity Framework, enables it to go n-tier, makes it easier to use, and adds all the features you see here plus more.
• Responsiveness
  DevForce applications are snappy. The domain model executes on client, client-side caching reduces trips to the server, data compression reduces network latency, and asynchronous queries allow background processing.
• Full n-tier LINQ Support
  Get the full power of LINQ in an n-tier application. LINQ-to-Entities only operates 2-tier, and other LINQ implementations only support a narrow range of queries. DevForce supports them all.
• Multiple Data Sources
  Use multiple back-end databases in a single domain model. Navigate cross-database relations using object properties. Save all your changes safely in a distributed transaction.
• Scalability
  Client-side caching, connection pooling, and a stateless and multi-core enabled server provide DevForce applications with excellent scalability and fault-tolerant characteristics.
• Security
  No connection string is exposed on the client. Server-side security checks prevent unauthorized access even if the client is compromised.
• WinForms Databinding Support
  Advanced databinding API works with .NET controls as well as Infragistics and DevExpress. Auto-populate forms with controls and then customize as you see fit.
• Best Practices
  DevForce is built around good architectural practices such as MVC and MVVM and enables you to conveniently keep your UI and business logic where they belong without sacrificing usability or functionality.