Refactoring: Boundaries

Please see my other Web Development articles. Ensuring Separation of Concerns When refactoring a web application, the following table represents a high-level overview of technologies/tools and the appropriate use of each, along with examples of how their boundaries for us may be violated. Keep in mind for each tool is intended boundary and look for…

T-SQL: Subquery with Sum

Please see my other Database Development articles. Performing a subquery while Sum-ming a column In this article I will demonstrate how to use a subquery with SUM() to return parent records and related child records while aggregating currency amounts. First, I’ll start with a a couple customer records, each with two order records with a…

Telerik: Display Dynamic Instructions

Please see my other Telerik articles. Displaying instructions dynamically to save space In this article I’ll demonstrate how to use Telerik’s Window control to dynamically display instructions in a popup window. Using a dynamically-displayed windows allows the instructions to remain hidden until the user requires them, saving valuable screen real estate. First, I’ll define my…

AJAX: Dropdown Update Table

Please see my other AJAX articles. Using AJAX to update a table from a dropdown In this article I’ll demonstrate using AJAX to update an HTML table based on a dropdown selection. First I’ll define the ViewModel to contain data for this exercise. Next, I’ll define the dropdown to be populated. Now, I’ll populate the…

AJAX

Please see my other Web articles. This page demonstrates some of my AJAX skills in delivering server-side functionality to the client. AJAX Dropdown Update Table

Telerik: Dropdown with Template

Please see my other Telerik articles. Displaying dropdown choices with special formatting In this article I’ll demonstrate how to create a Telerik dropdown using templates to display data in a tabular format. First, I’ll create a ViewModel to serve as the data layer. Note: Ensure you’ve decorated the CustomerID property with the [Key] attribute or…

Telerik UI for ASP.NET MVC

Please see my other Web articles. This page demonstrates some of Telerik’s impressive suite of rich controls designed to empower users, increase productivity and streamline business processes.   Telerik UI for ASP.NET MVC Display Dynamic Instructions Dropdown Filter on Multiple Columns Dropdown with Template Grid-Dropdown Column Filter Grid-Display Success/Failure Notification Grid-Dropdown Grid-Editor Template

Design Patterns: S.O.L.I.D. Dependency Inversion Principle

Avoiding Dependencies Between Layers As part of the S.O.L.I.D. design principles, the Dependency Inversion Principle (DIP) provides guidance for ensuring layers within the application avoid unnecessary dependencies from coupling. DIP ensures each layer’s modules remain independent of one another and should depend on abstractions instead of concrete details, increasing usability and flexibility to change. In…