@model int?

@{
    Layout = "_FieldLayout.cshtml";

    var htmlAttributes = new RouteValueDictionary();
    if (ViewBag.@class != null)
    {
        htmlAttributes.Add("class", "form-control " + ViewBag.@class);
    }
    else
    {
        htmlAttributes.Add("class", "form-control");
    }
       
    if (ViewBag.placeholder != null)
    {
        htmlAttributes.Add("placeholder", ViewBag.placeholder);
    }
}

@Html.TextBox("", ViewData.TemplateInfo.FormattedModelValue, htmlAttributes)