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Notification of Silverlight Applications about Database State Changes

by Max Paulousky

This article presents the techniques and caveats of building Silverlight applications that can be notified about database state changes via polling duplex. WSHttp binding and CLR triggers are used to implement the solution as well.

Silverlight Cairngorm - Port Cairngorm to .NET

by Modesty Zhang

Port Cairngorm 2.2.1 to Silverlight 2 Beta 2. Includes all source code and a sample application.

Integrate Reporting Services with Silverlight and RIA Services

by Ernesto Herrera

Integrate Reporting Services with your Silverlight Line-of-Business applications.

A MIME Message Viewing Library in WPF

by Shuqian Ying

The source code and a simple demo program for a plug-in in Microsoft Managed Extensibility Framework (MEF) that provides visual display of email messages.

Latest Articles

How to Build a Room Booking Calendar with dhtmlxScheduler

by Stas Wolski

This article describes how to implement a meeting room booking system in an ASP.NET MVC project with dhtmlxScheduler.

HTML5/CSS 3 Modal Dialog Box; no JavaScript

by DrABELL

Pure HTML5 modal pop-up box ("darkbox") implemented via CSS 3

YouTube® playback customization options

by DrABELL

Customize YouTube® video playback by adding web query parameters

Catel - Part 0 of n: Why choose Catel?

by Geert van Horrik

This article tries to explain why you should use Catel as the (or one of the) frameworks when developing WPF, Silverlight, and Windows Phone 7 applications.

All Articles

RIA

10 Things Every Java Developer Should Know About Flex

16 Jun 2011 by Kevin Ruse

10 Things Every Java Developer Should Know About Flex

A MIME Message Viewing Library in WPF

31 Jul 2012 by Shuqian Ying

The source code and a simple demo program for a plug-in in Microsoft Managed Extensibility Framework (MEF) that provides visual display of email messages.

A Pluggable Architecture for Building Silverlight Applications with MVVM

6 Jul 2011 by Weidong Shen

This article describes building a sample Silverlight application with the MVVM Light toolkit, WCF RIA Services, and a pluggable application architecture using MEF.

A Practical Quick-start Tutorial on MVVM in WPF

21 May 2010 by Dr. Song Li

This article gives a practical quick-start tutorial on MVVM in WPF for application developers.

A Quick Guide to Silverlight Ribbon Controls (Part - 1)

11 Jan 2011 by Kunal Chowdhury «IN»

A Quick Guide to Silverlight Ribbon Controls (Part - 1)

A Sample Silverlight 4 Application Using MEF, MVVM, and WCF RIA Services - Part 1

7 Jul 2011 by Weidong Shen

Part 1 of a series describing the creation of a Silverlight business application using MEF, MVVM Light, and WCF RIA Services.

A Sample Silverlight 4 Application Using MEF, MVVM, and WCF RIA Services - Part 2

8 Jul 2011 by Weidong Shen

Part 2 of a series describing the creation of a Silverlight business application using MEF, MVVM Light, and WCF RIA Services. In this second part, we will go through various topics on how MVVM Light Toolkit is used in our sample application.

A Sample Silverlight 4 Application Using MEF, MVVM, and WCF RIA Services - Part 3

8 Jul 2011 by Weidong Shen

Part 3 of a series describing the creation of a Silverlight business application using MEF, MVVM Light, and WCF RIA Services. In this part, we will discuss how custom authentication, reset password, and user maintenance are implemented in the sample application.

A Silverlight application with the WCF RIA Services Class Library

3 Mar 2010 by Jevgenij Pankov

A Silverlight application using the WCF RIA Services Class Library. Demonstrates how to implement a custom Authorization Service, utilize localized resources, and add unit tests for DAL.

A Silverlight Expense Report Module using View Model (MVVM)

30 Aug 2010 by defwebserver

This module allows you to easily gather, and process Expense Reports, from users in your DotNetNuke portal

A Silverlight Sample Built with Self-Tracking Entities and WCF Services - Part 1

8 Mar 2011 by Weidong Shen

Part 1 of a series describing creation of a Silverlight business application using Self-tracking Entities, WCF Services, WIF, MVVM Light Toolkit, MEF, and T4 Templates.

A Silverlight Sample Built with Self-Tracking Entities and WCF Services - Part 2

8 Mar 2011 by Weidong Shen

Part 2 of a series describing the creation of a Silverlight business application using Self-tracking Entities, WCF Services, WIF, MVVM Light Toolkit, MEF, and T4 Templates.

A Silverlight Sample Built with Self-Tracking Entities and WCF Services - Part 3

8 Mar 2011 by Weidong Shen

Part 3 of a series describing the creation of a Silverlight business application using Self-tracking Entities, WCF Services, WIF, MVVM Light Toolkit, MEF, and T4 Templates.

A Silverlight Sample Built with Self-Tracking Entities and WCF Services - Part 4

12 Apr 2011 by Weidong Shen

Part 4 of a series describing creation of a Silverlight business application using Self-tracking Entities, WCF Services, WIF, MVVM Light toolkit, MEF, and T4 Templates.

A ViewStack Component for Silverlight 2 with Transitions and Cache management

20 Oct 2008 by Anil Kumar T R

An enhanced ViewStack component for Silverlight 2 with transitions and cache management.

Achieve Unbeatable Performance with RadControls for Silverlight! Working with 50 million cells has never been faster

16 Mar 2010 by Evan Hutnick

This whitepaper explains how through smart use of UI and Data virtualization, content recycling, XAML optimizations and more, RadControls for Silverlight deliver first-class performance.

product-showcase

4 May 2011 by Hisham Abdullah Bin Ateya

aCloud Web Operation System running on the cloud

Add a method in domain service class but changes are not reflecting in silverlight

9 Aug 2011 by Piyush Nandanwar

HiI have created a domain service class (WCF RIA Services) for the current architecture of database using entity framework model.I have added a method in domain service class which is used to get a record from two tables.But the changes are not reflecting in silverlight...

Add a method in domain service class but changes are not reflecting in silverlight

12 Oct 2011 by I.explore.code

Try clearing the browser cache and then reload the page. The XAP file has to be updated, also check for any script errors on the page. I know your question is old and you probably may have figured out the solution in which case I would request you to close this question.Cheers

Adding Metadata to Entities in The Data Model

20 Jan 2011 by Gil Fink

Adding Metadata to Entities in The Data Model

entity-framework

An Introduction to Silverlight

17 Feb 2010 by keesari_anjaiah

The definition of Silverlight, the purpose of the Silverlight technology, and the different versions released so far. You will also read about the development tools required to work with Silverlight.

Basic Questions on Silverlight Technology

12 Jun 2010 by keesari_anjaiah

In this article, you will learn the basics of the Silverlight technology.

Best practices to create your own Fluent library

4 Nov 2010 by Nicolas Dorier

You'll be able to easily and mechanically create your own Fluent library.

Building a 3-Tier App with Silverlight 3, .NET RIA Services, and Azure Table Storage

11 Jul 2009 by Modesty Zhang

This article presents the techniques and caveats of building a 3-tire Azure hosted application using Silverlight 3 (presentation tier), .NET RIA services (business logic and data access), and Windows Azure Table (data storage).

Building a Multi-Page Image Viewer with ImageGear for Silverlight and Azure

31 Aug 2010 by CaseyMuse

This article will provide a quick tour of the ImageGear for Silverlight toolkit while developing a multi-page image viewer, running completely on the client, via managed code. Once the viewer is built, it will be ready for deployment to the Windows Azure Cloud via an Azure Cloud Service project.

product-showcase

Building an ASP.NET Validator Using Data Annotations

27 Jul 2010 by Gil Fink

The article describes an implementation of an ASP.NET validator that uses the new System.ComponentModel.DataAnnotations assembly that came in .NET 3.5 SP1.

Building Modular Silverlight Applications

5 Feb 2009 by Basab Dattaray, Modesty Zhang

This article presents a flexible and practical reusable control that is essential to modular Silverlight applications. It helps to improve a large Silverlight application's composite structure and run time performance.

Building Spring 2 Enterprise Applications: Chapter 4: Spring AOP 2.0

19 May 2008 by Stephanie Rodriguez

The open-source Spring Framework has become a popular application framework for building enterprise Java apps. This chapter explores the newest features in Spring AOP (Aspect-Oriented Programming), including @AspectJ-style annotations, the AspectJ pointcut language, Spring AOP XML tags and more.

Catel - Part 0 of n: Why choose Catel?

3 Nov 2014 by Geert van Horrik

This article tries to explain why you should use Catel as the (or one of the) frameworks when developing WPF, Silverlight, and Windows Phone 7 applications.

Windows-Phone-7

Change Timeouts for WCF RIA Services

4 Jun 2012 by Mayank Garg

Hi,While saving the large images in Sql Server-2008 R2 database from Silverlight 4.0 desktop application I am gettimg the below error.The HTTP request to 'http://' has exceeded the allotted timeout. The time allotted to this operation may have been a portion of a longer...

Change Timeouts for WCF RIA Services

15 Jun 2012 by bluesathish

Hi Mayank,I think you need to manually set the timeout values in binding settings of your web.config file. By default it'll be a 1 minute, you should have to increase it.For (ex), bindings> There are several timeouts like closeTimeout,openTimeout etc. you can set...

Clearing ComboBox in silverlight 5

2 Jan 2013 by srinivas.dammalapati

When i select Combobox dropdown list and click on clear button its getting clear but if we not select Combobox dropdown and click on Clear button its throughing Complex object instances can not be shared in silverlight 5 but in silverlight 4 its working in both cases. Please can help me its very...

Client Ids Generation with ASP.NET 4.0

10 Sep 2010 by Brij

This article discusses about one of the new features "Client ID generation" of ASP.NET 4.0

Computed Properties on the Client not working with WCF RIA Services Class Library

5 Jul 2013 by Member 7802839

Hi All,Calculated properties work fine when the WCF RIA Services are created under the web page that hosts the Silverlight application. However, I cannot figure out why computed properties do not work with WCF RIA Services Class Library (everything else works fine with WCF RIA Services Class...

Configure Silverlight 3 Applications using the Web.config File from ASP.NET

6 Jan 2010 by Dr. Song Li

This article introduces a method to configure Silverlight 3 applications using the Web.config file from ASP.NET.

Connection string to connect to Database from Web Service

30 Oct 2012 by Frank__Q

This is my connection string, which the web service (hosted in IIS) uses to connect to database

Connection string to connect to Database from Web Service

30 Oct 2012 by Loki

You have to turn on Impersonation in the web.config. This will make IIS use your windows account when connecting to SQL....

Connection string to connect to Database from Web Service

31 Oct 2012 by Loki

It will work if you use Windows Authentication, even remotely.

Create your first Web Application with GOA WinForms

2 Jul 2007 by Jeff Karlson

This article describes how to create a very simple project using GOA WinForms for Flash

Creating a Domain Service Factory to Host POCO Entities

10 Dec 2010 by Beavis Killer

This article demonstrates how to write a domain service factory to host plain old class object (POCO) entities and use them through RIA Services in Silverlight version 4.

Creating a WCF RIA Services Class Library for a Silverlight Application with Code First Approach

18 Apr 2012 by Shenwei Liu

Create and configure WCF RIA Services class library for Silverlight app

entity-framework

Creating and Using/Reusing User Controls in Silverlight

18 Feb 2011 by Marcio_Coelho

The creation of a user control that is built with watermark, tooltip and that can be reused in many areas of your app

CRUD operations in Siverlight using ADO.NET Data Service

10 Feb 2008 by Michael Sync

The simplest way to do CRUD (Create, Retrieve, Update, Delete) operations in Silverlight using ADO.NET Data Service (Astoria).

Custom DomainService Metadata Properties

29 Jul 2012 by Christian Amado

This brief tutorial pretends to demonstrate how to add custom properties inside DomainService's metadata class

DataDomainContext not authenticating

2 Dec 2010 by Karl Treier

OK so I have followed all the steps in the example at:http://msdn.microsoft.com/en-us/library/ee707353(VS.91).aspx[^]And login is working but my DataDomainContext is not authenticated when calling RIA Services. How does the DataDomainContext know to use the authenticated identity...

DataServiceQuery BeginExecute timeout sql

25 Jan 2011 by jlcj02

Hi.I am uisng SIlvelight 4, and RIA Services, so I am calling some store procedures with SL2005. the Store procedures all working successfull. except one of them, because it is taking a lot of time. I have an error regarding to timetout.This SP do a lot of instructions When I try it in SQL...

DataServiceQuery BeginExecute timeout sql

11 May 2012 by mbilal

please check you connection string

Deploying Silverlight with WCF Services

1 Feb 2011 by Tony Champion (Champion DS)

Deploying Silverlight with WCF Services

web_development

Develop Web and Mobile Applications the Easy and Intuitive Web Forms Way

4 Feb 2011 by Visual WebGui

VWG successfully reproduces the Web Forms development experience by offering pure Window Forms development paradigm for Web due to its unique application code virtualization technology which allows to virtualize over Web server rather than OS.

product-showcase

Developing Flex 4 Components Chapter Excerpt: Understanding Flex

15 Feb 2011 by Addison-Wesley

This chapter gives you a better understanding of what Flex is, both as a technology and as a development environment (Flash Builder).

Domain Service in Silverlight+Entity Framework+Ria Services

25 Jul 2012 by renabee

Hi,When creating the domain ria services, we should make one service for each table or one service for all tables??I'm asking this cause i created one service for each table, and worked fine with simple tables. But now i'm having problems with Parent/child tables... private...

entity-framework

Domain Service in Silverlight+Entity Framework+Ria Services

25 Jul 2012 by Christian Amado

Is recomendable that you create one service for all tables. But this is not a limitation.Have you got Navigation property on your Entity Framework Model?Must have a relation in the model and Database of course.Hope it helps.

entity-framework

Drawing Infragistics’ New Logo with the HTML5 Canvas

12 May 2011 by Murtaza Abdeali

Canvas is one of the principal new elements of HTML5, the next great Web markup language that lets you build Rich Internet Application user interfaces. In this short article, I’ll demonstrate how to use the HTML5 canvas to draw the new Infragistics logo.

product-showcase

Efficiently exposing your data with minimal effort

16 Nov 2009 by V.GNANASEKARAN

An article on how we can expose our data efficiently with minimal effort by leveraging Microsoft ADO.NET Data Services.

entity-framework

Enterprise RIA Development: Comparing Flex/Flash, Silverlight, HTML5/CSS3, jQuery/JavaScript

19 May 2011 by David_Tucker

An article that compares Flex/Flash, Silverlight, HTML5/CSS3, jQuery/JavaScript for enterprise RIA development

Error 404 - file not found on Silverlight RIA service call

24 May 2011 by buzzluck68

Hello, I have search everywhere for a solution to my problem, but I am not able to find one. I have built a Silverlight 4 Navigation app, and am using RIA Services to process a custom entity (which is essentially running server-side calls to COM dlls). In my debug environment, everything works...

Error 404 - file not found on Silverlight RIA service call

25 May 2011 by Patrick Kalkman

Start by calling your WCF RIA service from an internet browser. WCF RIA services automagically creates an endpoint for you to connect on. Try it and check if you can get it to work without using your client.The endpoint is located at the following url: [ApplicationBaseURI] +...

Error 404 - file not found on Silverlight RIA service call

26 May 2011 by buzzluck68

Many thanks to Mark Salsbery for the answer to this problem. When I changed the project to debug from IIS, it told me that I needed to install ASP.NET 4 on my server. I thought I had already done that by using the Add Windows Features, but apparently that only intalled ASP.NET 2. So I...

error tracing in silverligh 4

26 May 2011 by Member 7958280

I Want Example of Error Logging or Tracing msgs to store in Database(SqlServer). Using Silverlight 4(C#) with ria Service and EF4.0

entity-framework

error tracing in silverligh 4

26 May 2011 by Abhinav S

Clog: Client Logging, Silverlight Edition[^] is an excellent article about a highly customizable client logging provider.

entity-framework

Exploring Globalization with jQuery

13 Feb 2011 by Brij

This article discusses another official plugin of jQuery that is Globalization

Exposed ria SP works on localhost not on server

6 Nov 2012 by Member 9578199

Hi,I have an exposed stored procedure as JSON in ria services. When i go to this procedure adress in the localhost it works fine, when i upload to the server it dosen't work (normal tables work). the JSON file is 3.8mb.After adding the function import, i created my metadata for this...

Expressive Business Intelligence with the Infragistics Motion Framework

4 Jan 2011 by Jason Beres

Infragistics delivers better insight into complex business data with their data visualization controls, data visualization user experience and the Infragistics Motion Framework that lets you quickly build rich, interactive data visualizations to give users richer insight with an engaging experience.

product-showcase

filter in ria service

17 Jun 2012 by Mostafa Elsadany

hi everyone when filter data in domain data source class as example public IQueryable GetProduct2(int empno) { return this.ObjectContext.Product.Where(sa => sa.prono == empno); }so this filter before fetch data from database or after fill...

filter in ria service

30 Jul 2012 by Christian Amado

Your code applies over the Entity Model not in database.So the model pass the query to the database and the database process the query.Regards.

Frictionless WCF Service Consumption in Silverlight: Part 1

18 Sep 2010 by Yevhen Bobrov

Consuming WCF Services in Silverlight without static code generation of the service proxy.

Genesis Smart Client v2.0 - Ruby - User Experience Platform

7 Jun 2010 by Stephan Johnson

This article introduces The Genesis Smart Client Framework v2.0 (Project Ruby). It focusses on the user interface component, dubbed the User Experience Platform (UXP), developed using PRISM for WPF and Silverlight.

hierarchical data silverlight

27 Mar 2011 by tikke

Hi , can anyone explain me what i need to do to create 3 nested datagrids using information out of 3 tables which have a 1 to many relation in a hierachical order (see http://img340.imageshack.us/i/tablesv.jpg/[^]) i managed to do 2 tables but i don't seem to get data out of the third (ref...

Highlighted Features & Improvements In Silverlight 5

10 Jan 2011 by jebarson

Highlighted Features & Improvements In Silverlight 5

How do I develop RIA web applications using HTML5 front end and java backend

20 Aug 2014 by Member 11026149

Hi,How to develop RIA web applications using HTML5, CCS3, JQUERY and JAVA. Is there any framework is available to built web applications.In my web application contains grids and drop downs with images and Rich Text editors are there.Can any one suggest, which frame work is good for this.

How do I develop RIA web applications using HTML5 front end and java backend

4 Sep 2014 by Umesh Shukla

It is very much depend upon your requirements for choosing the framework. there are multiple framework available for your use like SPRING MVC, GRAILS, VAADIN, GWT, WICKET,PLAY, STRUTS AND JSF where you can write your back-end code as well develop your ui with html5 css3 and jquery.

How do i use WCF RIA by SOAP-OData-Json via Silverlight 4 - WP7 Client?

20 Apr 2011 by appxdev

Hi guys,I had a domain services (build in Silverlight Business Application Web) the Silverlight App local (e.g TestAppSilverlight and TestAppSilverlight.Web) is ok which I can implement CRUD method. (but I can't async this app !!!)But when I deploy this domain services via...

How do i use WCF RIA by SOAP-OData-Json via Silverlight 4 - WP7 Client?

22 Apr 2011 by Bruno Tagliapietra

You can't enumerate (do a foreach) on some collection.Try doing a "var myNewCollection = yourCollection.ToList();" first and enumerate on that.

How do i use WCF RIA by SOAP-OData-Json via Silverlight 4 - WP7 Client?

6 Jul 2011 by ServerYang

how i can retrieve from database by ria service with condition

13 Jun 2012 by Mostafa Elsadany

hi everyone how i cab retrieve data from database by ria service in silverlight with condition if i set condition in domain data source class this condition will filter data from memory after get all rows or filter data when get from database thanks from any help

how i can retrieve from database by ria service with condition

14 Jun 2012 by Farhan Ghumra

ur answer is within ur question, u have to use .where(ur condition) in domain service class

how i can retrieve from database by ria service with condition

14 Jun 2012 by Farhan Ghumra

data will be already filtered it wont be like that it will first fetch all d data and thn filter

How to add method , which get data from 2 table?

3 May 2013 by TokiHana

I am really confused.I followed this tutorial:http://msdn.microsoft.com/en-us/library/ee707362%28v=vs.91%29.aspx[^]I know how to add but now i don't know how to add method , which get data from 2 table not from a table.Because the result i want have properties from 2 tables.A for...

How to add method , which get data from 2 table?

3 May 2013 by i964682

I don't know which type of result I should return.-> What do you need?Someone please give me tip.-> Use a query to get the data from both tables.

How to Add Visually Stunning Financial Charts in Silverlight Applications – Part 1

23 Jun 2009 by SunilUrs

Creating Silverlight Financial Chart in XAML

How to Build a Room Booking Calendar with dhtmlxScheduler

5 Feb 2018 by Stas Wolski

This article describes how to implement a meeting room booking system in an ASP.NET MVC project with dhtmlxScheduler.

How to click/select Row in ASP.NET GridView or HTML Table

27 Jun 2012 by Technoses

The above code will slow down the browser and the browser can hang when Rows in Grid will be 10000 or above.Please view the below suggestion:CS Codeprotected void grvGroups_RowDataBound(object sender, GridViewRowEventArgs e){ if (e.Row.RowType == DataControlRowType.DataRow) { ...

How to Communicate Between Two Local Silverlight Applications?

26 Jul 2011 by Kunal Chowdhury «IN»

Communicate Between Two Local Silverlight Applications

How to determine the processor count from a Silverlight web page

28 Apr 2009 by Eylon Yogev.

How can you tell if a computer has more than one CPU without using any special permissions.

How to enable instance management technique in WCF RIA service not in plain WCF service

27 Jul 2011 by sharma sandeep

I want to manage the instance and concurrency mode in WCF RIA services like plain WCF service .how can i do this ,as the atribute does not appear in domin service(RIA serivice).

How to use WCF RIA Services in PRISM 4?

12 Jan 2012 by Savalia Manoj M

Hi All,I am developing Silverlight application with Prism 4 and WCF RIA service.I had searched on google to get sample explaining this, but failed to get any successful output.I am confuse about how to use RIA service in PRISM Application.Please suggest any link which provide...

How to use WCF RIA Services in PRISM 4?

12 Jan 2012 by Jaganathan Bantheswaran

Hi,I hope this pdf guide will help you

HTML5/CSS 3 Modal Dialog Box; no JavaScript

13 Jun 2015 by DrABELL

Pure HTML5 modal pop-up box ("darkbox") implemented via CSS 3

Incorporating Custom HTML5 Implementation with .NET Based Visual WebGui Rich Client

25 Apr 2011 by Visual WebGui

Explore the implementation and integration of HTML5 in the powerful Visual WebGui .NET framework as a custom control using jQuery

product-showcase

Integrate Reporting Services with Silverlight and RIA Services

28 Jul 2010 by Ernesto Herrera

Integrate Reporting Services with your Silverlight Line-of-Business applications.

entity-framework

Integrating Flex Applications with NHibernate

7 Apr 2011 by Joseph Magly

This article describes how to simplify web application development using Flex, Flash Builder, WebORB, and NHibernate, an open source object-relational mapper for the .NET framework.

Integrating Visual Studio LightSwitch Application Into An Existing Website using IFrames

25 Oct 2011 by defwebserver

An advanced LightSwitch tutorial covering PreProcess Queries, Email, PopUps, WCF RIA Services, and HTML pages

Intro to JavaFX - Dummy Chess

17 Apr 2009 by El Bob-O

This article describes my experiences in trying to learn the JavaFX programming language by writing a Chess program.

Introduction to ADO.NET Data Services/RIA Services

25 Feb 2010 by Sacha Barber

An introduction to ADO.NET Data Services / RIA Services.

Introduction to Microsoft Silverlight

22 May 2011 by Mohammad Elsheimy

In this article, we’ll see a brief introduction to Microsoft Silverlight, see how it fits with other technologies today, and watch it in action. Get ready!

Making WCF RIA Services work in a DMZ/Multitier architecture using Application Request Routing

13 Sep 2010 by Sandrino Di Mattia

A guide to creating secure Silverlight + WCF RIA Services applications for the enterprise! This is done using Application Request Routing (turning IIS in a reverse proxy).

Model level validation using ASP.NET MVC

18 Feb 2010 by Somnath Mondal

The benefit of putting validation in the model layer is that, the validation rules will be enforced everywhere in the application that accesses the database. It also means that we can change the validation rule in one place and every UI element inside our app will automatically get updated.

entity-framework

Need help with reading .lic file

21 Aug 2012 by Nicorette

Hey guys, I have created a program which is generating an encrypted license file *.lic, now I am working on a RIAServicesLibrary which will be implemented in software to check,read(decrypt, encrypt) and display data in lic file. Right now I am using LicenseManager class to validate license, and...

Need help with reading .lic file

21 Aug 2012 by Christian Amado

My advice is that you must use hashed data in your .lic. Because if you can decrypt the encrypted data anyone can decrypt it. So, you have a security issue there.Remember that in silverlight isn't recommendable to read file from client PC. May be this class help you in server & client...

Nested GridView controls in ASP.NET: best practices

30 Oct 2011 by DrABELL

ASP.NET GridView control hosting another GridView in data-centric web applications