internal static string ListItemToOption(SelectListItem item)
{
TagBuilder tagBuilder = new TagBuilder("option")
{
InnerHtml = HttpUtility.HtmlEncode(item.Text)
};
TagBuilder value = tagBuilder;
if (item.Value != null)
{
value.Attributes["value"] = item.Value;
}
if (item.Selected)
{
value.Attributes["selected"] = "selected";
}
if (item.Disabled)
{
value.Attributes["disabled"] = "disabled";
}
if (!string.IsNullOrEmpty(item.DataCode))
{
value.Attributes["data-code"] = item.DataCode;
}
return(value.ToString(TagRenderMode.Normal));
}
private static MvcHtmlString SelectInternal(this HtmlHelper htmlHelper, ModelMetadata metadata, string optionLabel, string name, IEnumerable <SelectListItem> selectList, bool allowMultiple, IDictionary <string, object> htmlAttributes)
{
ModelState modelState;
string fullHtmlFieldName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(name);
if (string.IsNullOrEmpty(fullHtmlFieldName))
{
throw new ArgumentException("Cannot be null", "name");
}
bool flag = false;
if (selectList == null)
{
selectList = htmlHelper.GetSelectData(name);
flag = true;
}
object model = (allowMultiple ? htmlHelper.GetModelStateValue(fullHtmlFieldName, typeof(string[])) : htmlHelper.GetModelStateValue(fullHtmlFieldName, typeof(string)));
if (model == null && !string.IsNullOrEmpty(name))
{
if (!flag)
{
model = htmlHelper.ViewData.Eval(name);
}
else if (metadata != null)
{
model = metadata.Model;
}
}
if (model != null)
{
selectList = GetSelectListWithDefaultValue(selectList, model, allowMultiple);
}
StringBuilder stringBuilder = new StringBuilder();
if (optionLabel != null)
{
SelectListItem selectListItem = new SelectListItem()
{
Text = optionLabel,
Value = string.Empty,
Selected = false
};
stringBuilder.AppendLine(ListItemToOption(selectListItem));
}
foreach (SelectListItem selectListItem1 in selectList)
{
stringBuilder.AppendLine(ListItemToOption(selectListItem1));
}
TagBuilder tagBuilder = new TagBuilder("select")
{
InnerHtml = stringBuilder.ToString()
};
TagBuilder tagBuilder1 = tagBuilder;
tagBuilder1.MergeAttributes <string, object>(htmlAttributes);
tagBuilder1.MergeAttribute("name", fullHtmlFieldName, true);
tagBuilder1.GenerateId(fullHtmlFieldName);
if (allowMultiple)
{
tagBuilder1.MergeAttribute("multiple", "multiple");
}
if (htmlHelper.ViewData.ModelState.TryGetValue(fullHtmlFieldName, out modelState) && modelState.Errors.Count > 0)
{
tagBuilder1.AddCssClass(HtmlHelper.ValidationInputCssClassName);
}
tagBuilder1.MergeAttributes <string, object>(htmlHelper.GetUnobtrusiveValidationAttributes(name, metadata));
return(new MvcHtmlString(tagBuilder1.ToString(TagRenderMode.Normal)));
}