Other methods in the service follow a similar pattern. You can take a look at them in the source code. The page we are going to design has a menu on the left side with links to browse videos by categories or add a new video. At the centre, the page would contain the ng-view directive, the place where templates of other pages would be rendered. We need a small Controller to serve data about categories that are used to generate a list of links on the left menu.
In Angular, a controller gets instantiated. But the objects used for data binding have to be made available on the Scope. A general interface type for scopes exists in the Angular type declaration file, but we need to create a child type to accommodate the new objects to be added to the scope specific to the controller. The controller for serving the categories is straight forward. It just makes a call to the method in the service and assigns the obtained results to scope. The voting buttons cannot be enabled for any value of rating.
The buttons should prevent the user from going below 1 and going above 5. Following is the mark-up in the video list view:. This view is created to act in two ways: one is to display all videos and other is to display videos based on the category received in the URL. As we already saw, we need to create a scope type specific to this view. The TechVidsListCtrl is responsible to fetch the videos based on route parameter and handle functionality to modify rating of the videos.
Following is the implementation:. The add video view is responsible to accept inputs, validate them and post the values to the Web API endpoint. The list of validations performed on this page is:. To check if the title assigned to the video is unique, we need to create a custom validation directive.
In Angular, a directive is a function that returns a special object that has a set of pre-defined properties. In TypeScript, we can create a static method and make it return the required directive object.
Following is the implementation of the directive:. I think, by now you must have got a good understanding on implementing Angular components using TypeScript.
Download the entire source code from our GitHub Repository at bit. This article has been editorially reviewed by Suprotim Agarwal. C and. Organized around concepts, this Book aims to provide a concise, yet solid foundation in C and. NET, covering C 6. NET Core, with chapters on the latest. NET Core 3. NET Standard and C 8. Use these concepts to deepen your existing knowledge of C and.
NET, to have a solid grasp of the latest in C and. NET OR to crack your next. NET Interview. Views: You will create a sample video based training application which consumes its data using ASP. TypeScript comes with a set of primitive types: number: to represent numeric values string: to represent string values boolean: to represent Boolean values any: to represent any type of value, to be used only when there are multiple possibilities To create custom types, we need to define classes or interfaces depending on your applications need.
Core AngularJS. Route Bootstrap AngularJS. This Angular book will help you learn the essential features of the Angular framework by creating ten different real-world web applications. By the end of this book, you will be able to build Angular apps using a wide variety of technologies. Choose the ASP. NET and web development workload, then choose Modify.
Visual Studio manages files for a single application in a project. The project includes source code, resources, and configuration files. To start with an empty ASP. In Visual Studio , choose Create a new project in the start window.
Type web app , choose C as the language, then choose ASP. On the next screen, name the project, and then choose Next. Choose either the recommended target framework or. NET 6, and then choose Create. In the left pane of the New Project dialog box, expand Visual C , then choose. NET Core. In the middle pane, choose ASP. If you don't see the ASP. NET and web development workload. For detailed instructions, see the Prerequisites. Video description Angular and TypeScript have become key tools for enterprise web developers.
Understand how Angular projects are structured Survey TypeScript basics e. Learn how to create reusable components and services Practice arranging client-side navigation using the router Discover how to inject services into components Understand to communicate with servers using HTTP Pick up the ability to deploy Angular apps on Web servers Yakov Fain is a Java Champion and cofounder of the IT consultancy, Farata Systems.
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