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Tips for Building a BO for Silverlight and RIA

The following are some tips when building a business object class for use by Silverlight and RIA services. NOTE: This assumes you are not using Entity Framework (EF). Use Class-Level Validation Specifying class-level validation allows you to perform validation on the entire class. This is a good location...

Posted to Deborah's Developer MindScape by Deborah Kurata on Mon, Jan 21 2013
Filed under: Filed under: VB, C#, CSharp, Silverlight, RIA Services
Silverlight/WCF RIA Validation: Metadata Class

Data annotation attributes are a great way to add single property validation to your Silverlight/WCF RIA application. But what if you don't want to inject attributes all over your business classes? The purpose of a metadata class is to have a place for all of these attributes external from the business...

Posted to Deborah's Developer MindScape by Deborah Kurata on Wed, May 4 2011
Filed under: Filed under: C#, .NET, CSharp, Silverlight, RIA Services
Silverlight Validation: Resource File

Resource files are a great way to manage strings, especially if you need to support multiple languages. This post demonstrates how to use a resource file with the validation attributes used by Silverlight and WCF RIA Services. NOTE: This post is part of a set of validation posts which starts here and...

Posted to Deborah's Developer MindScape by Deborah Kurata on Tue, May 3 2011
Filed under: Filed under: C#, .NET, CSharp, Silverlight, RIA Services
Silverlight/WCF RIA Single Property Validation

When you identify the validation scenarios for your application, you will find that some only require basic single property validation. Examples: Ensure that a first name is entered. Ensure that the first name is not longer than 20 characters Ensure that the age is between 16 and 120. Ensure that the...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sun, May 1 2011
Filed under: Filed under: C#, .NET, CSharp, Silverlight, RIA Services
Silverlight MVVM, WCF RIA Services Simple Sample Application

This post provides a simple Silverlight MVVM, WCF RIA Services sample application that is used to demonstrate validation techniques. The sample application is provided in this separate post so it can be readily used with any of the presented validation techniques. NOTE: This post defines a sample application...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sun, May 1 2011
Filed under: Filed under: C#, .NET, CSharp, Silverlight, RIA Services
Silverlight MVVM, RIA, and Validation

One of the biggest challenges of implementing validation in Silverlight is finding the appropriate technique based on your architecture and goals. There are lots of choices and lots of examples, but not all examples work in all scenarios. Plus many examples demonstrate techniques that are no longer necessary...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sun, May 1 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight, RIA Services
Silverlight Simple MVVM Printing

Many users want to print information from your line of business (LOB) application. This post covers the simple case where the user wants to print a copy of what they see on the screen. But instead of putting the print code in the code behind file, it follows a Model-View-View/Model (MVVM) approach. NOTE...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sat, Feb 19 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight
Silverlight MVVM Commanding II

This prior post introduced commanding in Silverlight for use with MVVM. However, the built-in Silverlight commanding only works for controls that inherit from ButtonBase, such as Button and HyperlinkButton. This post provides information on implementing commanding for other Silverlight controls. For...

Posted to Deborah's Developer MindScape by Deborah Kurata on Mon, Feb 14 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight
Silverlight Simple MVVM Commanding

As you build your line of business (LOB) applications, you will need to process commands. In many cases, these commands are executed when the user clicks a button. For example, when the user clicks the Save button, the code needs to process a Save "command" and perform the save. One way to...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sat, Feb 12 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight
Simple Silverlight MVVM Base Class

As you start to add more Views and associated View/Models to your Silverlight line of business (LOB) application, you will notice that the classes include some common and repeated code. Building a simple base class for your View/Models provides a single place for that common code. NOTE: This post is...

Posted to Deborah's Developer MindScape by Deborah Kurata on Mon, Feb 7 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight, RIA Services
Updating Data in a Silverlight Application: EF

This prior post covered the details of setting up a database, defining an entity model using Entity Framework, building WCF RIA Services to access that entity model, and hooking it all up to a Silverlight DataGrid. That is all well and good. But most line of business (LOB) applications also need to update...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sat, Feb 5 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight, RIA Services
Accessing Data in a Silverlight Application: EF

One of the challenges of building a Silverlight line of business (LOB) application is getting the data from the business database. The business database resides on a server computer and the Silverlight application resides on each user's computer. This post covers using Entity Framework (EF) to get...

Posted to Deborah's Developer MindScape by Deborah Kurata on Mon, Jan 31 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight, RIA Services
Missing Chart Legend

If you built a custom theme for your application (similar to this prior post ) then you may find that your chart legend contents disappear. NOTE: This post is part of a series that starts with this prior post . The example in this post uses the application that is built as part of that series. The chart...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sat, Jan 29 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight
Charting in a Silverlight Application using MVVM

Data visualization is often a requirement in today's line of business (LOB) applications. Plus charts are just more fun to look at than data grids. Silverlight provides many different types of charts you can use to display the data in your LOB application. NOTE: This post is part of a series that...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sat, Jan 29 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight
Populating a DataGrid with Dynamic Columns in a Silverlight Application using MVVM

When binding to a DataGrid, in most cases you have a fixed number of columns and a variable number of rows. This post covers the case when you have a variable number of rows AND a variable number of columns. NOTE: This post is part of a series that starts with this prior post . The example in this post...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sun, Jan 23 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight
Populating a DataGrid in a Silverlight Application using MVVM

Model View View/Model (MVVM) is an effective pattern for building Silverlight applications. It provides many useful benefits when building business applications with Silverlight. NOTE: This post is part of a series that starts with this prior post . The example in this post uses the application that...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sat, Jan 22 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight
Populating a DataGrid in a Silverlight Application

One of the common requirements of a line of business application is to present data. This post demonstrates the basics of how to populate a DataGrid from a business object. This post is a "stepping stone" to the ultimate goal of populating the DataGrid using MVVM, which is a later post in this...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sat, Jan 22 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight
Adding a New Page to a Multi-Page Silverlight Application

So, you've started building a Silverlight Line of Business (LOB) application using the Silverlight Navigation Application template ( as shown in this prior post ). This post covers how to add pages to it. NOTE: This post is part of a series that starts with this prior post . 1) Add a new Page by...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sun, Jan 16 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight
Theming a Silverlight Application using Custom Themes

If you want to give your line of business application a nice color theme and some basic interactive styles without a lot of work, you can use the built-in themes as described in this prior post . However, as shown in that prior post you may want to adjust or customize the theme. NOTE: This post is part...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sun, Jan 16 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight
Theming a Silverlight Application using Existing Themes

There are two ways to apply styles in a Silverlight application: explicit styles and implicit styles. The primary difference between them is that explicit styles have names (x:Key) and are applied to controls by their name. Implicit styles are not named and are applied to controls that don't have...

Posted to Deborah's Developer MindScape by Deborah Kurata on Sun, Jan 16 2011
Filed under: Filed under: VB, C#, .NET, CSharp, Silverlight

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