Select - potatoscript/javascript GitHub Wiki

<select class="form-control" style="width:200px"
id="rubber_material_list"
asp-items="ViewBag.Rubber">
</select>
<input style="display:none" type="text" name="rubber_material_name" id="rubber_material_name" value="@ViewBag.rubber_material_name" />
<script>
 var obj = document.getElementById("rubber_material_list");
 for (var i = 0; i < obj.length; i++) {
    if (obj[i].text=="@ViewBag.rubber_material_name") {
       obj[i].selected = true;
    }  
  }
</script>