tag-helpers – Tarik Billa

Can I use a Tag Helper in a custom Tag Helper that returns html?

April 10, 2024 by Tarik

No you cannot. TagHelpers are a Razor parse time feature. One alternative is creating a TagHelper and manually invoking its ProcessAsync/Process method. Aka: var anchorTagHelper = new AnchorTagHelper { Action = “Home”, }; var anchorOutput = new TagHelperOutput(“a”, new TagHelperAttributeList(), (useCachedResult, encoder) => new HtmlString()); var anchorContext = new TagHelperContext( new TagHelperAttributeList(new[] { new TagHelperAttribute(“asp-action”, … Read more

Radio Button Tag Helpers in ASP.NET 5 MVC 6

December 3, 2023 by Tarik

There is a TagHelper for all the input types which includes the radio button type as well. Assuming you have a view model like this public class CreateUserVm { public string UserName { set; get; } public IEnumerable<RoleVm> Roles { set; get; } public int SelectedRole { set; get; } } public class RoleVm { … Read more

Set Default/Null Value with Select TagHelper

May 31, 2023 by Tarik

You can just insert an option item inside the select: <select asp-for=”Category” asp-items=”@ViewBag.Category” class=”form-control”> <option disabled selected>— SELECT —</option> </select> The disabled keyword in the code above means that the “— SELECT —” row cannot be picked again once a choice has been selected in the list. If you want the user to be able … Read more

asp.net conditionally disable a tag helper (textarea)

May 25, 2023 by Tarik

It is actually very simple, the disable attribute is already working as you want – you can pass in a boolean value: <textarea asp-for=”Doc” disabled=”@Model.MustDisable”></textarea> if false the disabled attribute is not rendered: <textarea></textarea> if true the disabled attribute is set to “disabled”: <textarea disabled=”disabled”></textarea>

TagHelper for passing route values as part of a link

February 10, 2023 by Tarik

You can use the attribute prefix asp-route- to prefix your route variable names. Example: <a asp-action=”Edit” asp-route-id=”10″ asp-route-foo=”bar”>Edit</a>

How to add link parameter to asp tag helpers in ASP.NET Core MVC

November 17, 2022 by Tarik

You can use the attribute prefix asp-route- to prefix your route variable names. Example: <a asp-controller=”Product” asp-action=”GetProduct” asp-route-id=”10″> ProductName</a>

Select Tag Helper in ASP.NET Core MVC

October 13, 2022 by Tarik

Using the Select Tag helpers to render a SELECT element In your GET action, create an object of your view model, load the EmployeeList collection property and send that to the view. public IActionResult Create() { var vm = new MyViewModel(); vm.EmployeesList = new List<Employee> { new Employee { Id = 1, FullName = “Shyju” … Read more