ASP.NET Web API has an oAuth2 server. There is an endpoint, /token. Posting to the token endpoint with login credentials gives an access token. For authorising the user, pass the access token to all other endpoints exposed by the API.
Role based security restricts access to various parts of the API based on the user’s role. For example, there is more API access for admin users.…
ASP.NET Identity Framework 2.0 is integrated with EntityFramework. The entity classes available are Users, Roles, Claims and Logins. The Identity database can be any store – SQL Server, MySQL or Oracle. This article provides guidance on how to integrate ASP.NET Identity 2.0 with a MySQL database.
MySQL has naming conventions which are very different from SQL Server.…
Responsive design is making the page layout adaptable to mobile devices. There are many ways to make a layout responsive. Twitter bootstrap is one way to make it happen. I prefer simple media queries. This article highlights one such example.
At the bottom of every content site, there are several links. The links are unordered lists (ul tags) in HTML.…
Debugging a class library in a web application is pretty simple. But, this is something that can be tricky when you are joining a new organization or project.
If you do not know how to debug a class library in a web application, here are the steps:
Validation in ASP.NET MVC is done by decorating model properties with attributes. There are some built-in validation attributes. For example, Required attribute ensures that there exists a value for the property. We can write custom validation attributes as well. In this post, we build a UrlValid attribute. When the user enters an URL in a TextBox, the UrlValid attribute verifies if the URL is active.…
Extension method extends an existing class. In this post, we will add an extension method to HtmlHelper class. The method display error messages.
Data annotations validates user input. An example is shown below.
[Required(ErrorMessage = "Please enter name")]
public string Name { get; set; }
Controller has the ModelState object. ModelState object has the validation errors. For each user input (eg.…
There are SEO problems while using frameworks like KnockoutJS or AngularJS or ReactJS. The page loads, then javascript loads. JavaScript renders the HTML elements. Web crawlers of today do not execute the JavaScript. So, the page content is often missing or incorrect. Hence, the SEO suffers.
Update (Sep 2017): Search engines, especially Google, runs the JavaScript. SEO has improved for JavaScript frameworks.…
Sometimes, a controller action trigger a long running background process. For example, the user clicks a link in the page. Generate a word document in the background. Show the properties of the document in the subsequent page. Generation of word documents take anywhere between 3 seconds to 30 seconds. During this time, the user needs some feedback about the progress of the operation.…
ASP.NET MVC offers TempData. TempData, as the name implies, is a temporary storage. It retains the data between two user requests but no more. By default, it uses the SessionState for storing data. A web farm has multiple servers having the application. Subsequent requests do not go to the same server. So, using session for storing TempData is not a viable solution.…
jQuery UI has an AutoComplete widget. The widget is quite nice and straight forward to use. In this post, we will see how to integrate the widget with an ASP.NET MVC application.
The first step is to add the jQuery scripts and styles into bundles. There is a script bundle for jQuery. And another script bundle for jQuery UI.…