Conditional Attributes in Razor respond to boolean values, which can be very useful for say checkboxes. A checkbox has a checked attribute that you set to checked when the checkbox is supposed to be checked; Otherwise the attribute is not included. This is perfect for Conditional Attributes. Add the following code block and HTML to your Razor View. If the variable used to set any of them resolves to null, not only is it not rendered, but any remaining whitespace is collapsed: Conditional attributes provide a nice addition to Razor allowing the Web Pages developer to manage scenarios that can result in messy spaghetti code in a much more succinct manner. A directive attribute typically changes the way an element is parsed or enables different functionality. “this.href” -> fetches the href value from the ‘a’ tag. RazorRéférence de syntaxe pour ASP.NET Core | Microsoft Docs Required Data Annotation attribute is used for validation of the property. In fact, even apply a value such as false will still activate them. Using Blazor @ Variables to Specify Html Attributes Implicitly Typed Variable : Using var keyword you can initialize any type of variable in razor syntax. JavaScript - how to pass value to razor variables from JavaScript? This scenario only applies to Razor components (.razor). In Chrome, if you right-click and select Edit HTML, it switch back so you can see those nasty HTML character codes, making it clear you have real outer quotes, and HTML encoded inner quotes. As you know Razor works with Pure HTML so you can design you Form in Pure HTML as follow. Definition and Usage. In the following example, IsCompleted determines if the element's checked property is set. Conditional HTML Attributes using Razor MVC3 (2) . "auth" : "anon" Therefore, the solution is: The environment tag helper supports rendering different content dependent on the current value of the ASPNETCORE_ENVIRONMENT environment variable for the application. Razor est une syntaxe de balisage pour incorporer du code .NET dans des pages Web. HTML Encoding using Razor. As you may know, Razor can be written using C# or VB.NET syntax. If the value is true, the property is set. 3.For each value of A, create a new descendant of node.