Thoughts on .Net & Coding

In the previous part of this article and video series you learned about TypeScript inheritance. In this article you will learn about a feature of TypeScript that allows you to annotate and modify classes and class members. This feature is called Decorators. Decorators is an experimental feature and you need to enable them in your TypeScript configuration file. You will find TypeScript decorators analogous to C# attributes in that they form the metadata of a class and class members.

Object oriented programming languages such as C# allow you to inherit functionality from base class. TypeScript also offers inheritance capabilities so that your classes can inherit from other classes. TypeScript doesn't support multiple inheritance (although your class can implement multiple interfaces). You can also create abstract classes - classes that can't be instantiated on their own; they must be inherited in other classes. In this article you will learn all these aspects of TypeScript inheritance.

In the previous part of this article and video series you developed a TypeScript class that invokes an ASP.NET Core Web API using XMLHttpRequest object. Recollect from the previous part that the EmployeeApiClient class expects a few callback functions. These callback functions receive the response returned by the Employees Web API and display it on to the web page. In this part you will create another TypeScript class that houses those callback functions. You will also create the Employees Web API that performs the CRUD operations. Finally, you will test the functioning of both the TypeScript classes (and the Employees Web API) by calling their methods from a web page.

In the previous part of this series you learned about TypeScript functions. Now it's time to peek into some more interesting features. To that end, this part discuses three of them - interfaces, classes, and inheritance. You will build a fully functional class that helps you invoke an ASP.NET Core Web API. You then perform CRUD operations using the class developed in this exercise.

This is a companion video to "Essentials of TypeScript Functions" and shows various examples discussed in the article.

In the previous article of this series you learned about TypeScript variables and their data types. A common JavaScript construct is function. And TypeScript has some interesting features to offer when it comes to creating functions. Specifically this article covers function return types, optional parameters, default parameters, rest parameters, and callbacks.

In the previous article and companion video of this series you prepared an ASP.NET Core project in Visual Studio to use TypeScript. You also developed a simple "Hello World" example. Now let's move ahead and learn something about the data types supported by TypeScript.

Now a days many ASP.NET developers use TypeScript for their client side code. So, it's worth to add TypeScript in your web development skill-set. If you are a beginner new to TypeScript this multipart series consisting of articles and videos is just for you. In this series I am going to introduce you with the fundamentals of TypeScript language and how to integrate it in your ASP.NET Core apps. I am going to assume that you use Visual Studio 2019 as the IDE for your web development and you are familiar with the basics of JavaScript programming.