TagHelper for passing route values as part of a link

Question

When specifying asp-controller and asp-action on a link, what's the syntax for also passing an id attribute?

E.g. If I wanted to link to the edit URL for a given object, the required URL would be /user/edit/5 for example.

Is there a method to achieve this using TagHelpers, or do we still have to fall back to @Html.ActionLink()?

Answer 1

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>

Answer 2

I'd like to suggest a combination of the other two answers, but with a bit of extra clarification.

You will use an attribute prefix asp-route-{name} where {name} is the name of the route parameter you want to use. In other words, if the number 5 in your route is passed into the controller as an ID value, you could have:

<a asp-controller="User" asp-action="Edit" asp-route-id="@item.ID">Edit</a> 

or if the parameter you wanted to pass to the route was item.UserName then

<a asp-controller="User" asp-action="Edit" asp-route-username="@item.UserName">Edit</a> 

And if you had both parameters then

<a asp-controller="User" asp-action="Edit" asp-route-id="@item.Id" asp-route-username="@item.UserName">Edit</a>