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Paul Sheriff's Blog for the Real World

This blog is to share my tips and tricks garnered over 25+ years in the IT industry

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A Communication System for XAML Applications
In any application, you want to keep the coupling between any two or more objects as loose as possible. Coupling happens when one class contains a property that is used in another class, or uses another class in one of its methods. If you have this situation...
Read XML Files using LINQ to XML and Extension Methods
In previous blog posts I have discussed how to use XML files to store data in your applications. I showed you how to read those XML files from your project and get XML from a WCF service. One of the problems with reading XML files is when elements or...
Client-Side Logging in Silverlight
Many of us have implemented logging in our ASP.NET, Windows Forms and WPF applications, so why shouldn’t you do the same in your Silverlight applications? Well, you should. In this blog post I will show you one approach on how you might perform this logging...
Retrieve System Information in Silverlight
In a Silverlight application we are building for a client, they wanted an About screen that would display system information such as the current URL, the operating system name and version, the product name and various other information. In the same application...
Posted: May 20 2012, 05:42 PM by psheriff | with no comments
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Dynamic Search with LINQ, the Entity Framework and Silverlight – Part 2
After my previous blog post, I realized that using SQL strings is not a great way to do things. Sometimes we start blogging too quick and then realize our mistakes after. But, no big deal, live and learn... I am going to now rewrite this application and...
Dynamic Search with LINQ, the Entity Framework and Silverlight
I have been helping a client with a Silverlight application and one of his requirements was to allow his users to be able to query 1 to 5 fields and use different operators for each field. For example, they can choose to search for a Company Name that...
Silverlight Tree View with Multiple Levels
There are many examples of the Silverlight Tree View that you will find on the web, however, most of them only show you how to go to two levels. What if you have more than two levels? This is where understanding exactly how the Hierarchical Data Templates...
Understanding XAML Screen Layout
When you first start designing XAML screens in either WPF or Silverlight there are several approaches you can take. You can just draw controls on a Grid and let the controls figure out where they are in relation to one another and the Window via the Margin...
Synch a ComboBox in Silverlight with Foreign Keys
In most database applications you will have foreign keys to express a relationship between one table and another. Many times this takes the form of a lookup table where you want the user to pick from a selection of items such as an Employee Type for an...
The Basics of MVVM
While training and consulting with clients around the country, I find that many developers still have trouble grasping the concept of Model-View-View Model (MVVM) as used in Silverlight or WPF. In this blog post I thought I would show two examples side...
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