Call JavaScript Function from Controller in ASP.Net MVC

///////////// Controller

ViewBag.JavaScriptFunction = string.Format("Search_Filter();");

/////////////  HTML

@if (ViewBag.JavaScriptFunction != null)

                {

                    <script type="text/javascript">

                        @Html.Raw(ViewBag.JavaScriptFunction)

                    </script>

                }

//////////////////// Js

function Search_Filter() {

alert(1);

}