Building a Silverlight 3 based RIA Image Management System - 1
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by Xianzhong Zhu
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System Functionalities and Architecture

First of all, what needs to be made clear is that the system is the embryonic form of an extremely complex RIA image management system. Flickr is the famous one-line image management software, under the banner of the "Photo Sharing". Of course, their data, and the strong popularity are hard to catch up with to many similar sites. However, I highly recommend interested readers put this chapter in a similar case to study it, and if so, I believe you will have more gains.

System Functionality Module

The online image management system in this article will achieve the following modules:

·         Image Category Management

·         Picture data preview and upload

·         Picture data download and browsing

·         Image Browsing

To simplify the description of the problem, the following diagrams are given to illustrate the functional modules to be achieved in our case.

Figure 1Image category management module

Figure 2Image upload module

Figure 3Image download module

Figure 4Picture browsing module

Next, we are to discuss the system architecture design.

Architecture Design

This image management system uses a typical three-tier.

Figure 5 demonstrates the schematic of different layers of the sample in this article, as well as summarizes the important characteristics of the sample programs.

Figure 5the N-tier structure used in this case

Overall, the case structure of this article has the following important features:

·         SQL SERVER 2008 is used as the server-side data storage.

·         The up-to-date ADO.NET data services technology serves as the data access layer, which will greatly simplify the data access layer design in the Silverlight application, thus enabling developers to focus on the XAML presentation layer and business logic modules.

·         The business logic tier is relatively simple, only corresponding to some business logic tool classes.

·         User interface layer (presentation layer) is mainly composed of XAML-formed Silverlight user controls embedded inside the ASP.NET page. In the XAML page design, the popular data source binding is utilized. Furthermore, in order to reduce as much as possible the coupling of the presentation layer and the business logic tier, we avoid directly using the XAML markup attribute attaching different events to the related handlers, but choose to use the code-behind class to achieve the attachments, which can be easily accomplished through the "+ =" operator and the event delegate provided in C # language.

Figure 6 below gives the general document layout in this sample solution of this article. In fact, this layout is also, in a certain sense, reflects the structure of the entire system.

Figure 6the file layout in the sample solution

With the above goals in mind, now let's shift our attention to the database design.


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User Comments

Title: add to xml file   
Name: sir jone
Date: 2009-09-19 4:18:31 AM
Comment:
hi dear ,
would you mind send me add to xml file from textbox sample
if you send my email is : tanha_x10@yahoo.com
tnx so much .






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