Answer by mykhailovskyi for Html.ActionLink onclick JavaScript function is not invoked and name of function is corrupted in output HTML

You add onclick handler in wrong place. You must put it in Html Attributes block instead Route values. Try it:

<p>@Html.ActionLink("Call number", "Call", new { id = Model.Id, number = Model.CellNumber }, new { @class = "btn btn-default", onclick = "alert('a');" })</p>