TagHelper for passing route values as part of a link
asp.net Coreasp.net Core-MvcTag Helpersasp.net Core Problem Overview
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()?
asp.net Core Solutions
Solution 1 - asp.net Core
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>
Solution 2 - asp.net Core
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>
Solution 3 - asp.net Core
you can pass custom ID using below code:
<a asp-controller="User" asp-action="Edit" asp-route-id="@item.ID">Edit</a>
Solution 4 - asp.net Core
I would suggest one more way for Razor view to use model value using @Html.actionlink in jsp
var URLvalue='@Html.ActionLink("UserString", "action", new { routeValueName1 = "__value1__", routeValueName2="__value2__" }, htmlAttributes: new { @class = "btn btn-default", @role = "button" })'
.replace('__value1__', Model.somevalue).replace('__value2__', Model.somevalue);
you can use URLvalue where ever you want to in jsp or jquery.