Post_16_23.cs

protected TagBuilder CreateInputTag(Localization localization)
{
  TagBuilder tb = new TagBuilder("input");

  tb.TagRenderMode = TagRenderMode.SelfClosing;

  if (!this.IsValid(localization))
    tb.AddCssClass("input-validation-error");

  tb.AddCssClass("field__input");
  tb.AddCssClass("input");
  tb.MergeAttribute("id", this.GetIdentity(localization));
  tb.MergeAttribute("name", this.GetIdentity(localization));

  string value = this.GetValue(localization);

  if (!string.IsNullOrEmpty(value))
    tb.MergeAttribute("value", value);

  RequiredAttribute requiredAttribute = this.GetRequiredAttribute();

  if (requiredAttribute != null)
  {
    tb.MergeAttribute("data-val", true.ToString().ToLower());
    tb.MergeAttribute("data-val-required", string.Empty);
  }

  return tb;
}