Umbraco GetPreValue of Dropdown Editor

This article is show how to get the prevalue of a editor dynamically

Input the prevalue thru Umbraco.

Result

Method:

Environment :
Umbraco version 7.6.3 assembly: 1.0.6361.21154
Visual Studio 2015

Controller :

public ActionResult RenderCategoryList()
{
 Dictionary<int, object> categoryList = new Dictionary<int, object>();

 int? typeId = Library.getPropertyIdByName("Your Editior Name");
 if (typeId != null)
 {
  categoryList = Library.GetPrevalues(typeId.Value);
 }

 return PartialView(PartialViewPath("_SearchCategory"));
}

Library Class

using System.Xml.XPath;
using Umbraco.Core;
using Umbraco.Core.Models;
using Umbraco.Core.Services;

namespace yourNamespace
{
    public static class Library
    {
        public static int? getPropertyIdByName(string name)
        {
            IDataTypeService service = ApplicationContext.Current.Services.DataTypeService;
            IDataTypeDefinition definition = service.GetDataTypeDefinitionByName(name);

            return definition != null ? (int?)definition.Id : null;
        }

        public static Dictionary<int, object> GetPrevalues(int dataTypeId)
        {
            XPathNodeIterator preValueRootElementIterator = umbraco.library.GetPreValues(dataTypeId);
            preValueRootElementIterator.MoveNext(); //move to first 
            XPathNodeIterator preValueIterator = preValueRootElementIterator.Current.SelectChildren("preValue", "");
            var retVal = new Dictionary<int, object>();

            while (preValueIterator.MoveNext())
            {

                retVal.Add(Convert.ToInt32(preValueIterator.Current.GetAttribute("id", "")), preValueIterator.Current.Value);
            }
            return retVal;
        }
    }
}

Partial View

@inherits Umbraco.Web.Mvc.UmbracoViewPage<List<Object>>
@using yourNamespace.Models

@*TODO: Render Category from CMS content dynamic*@
<select class="form-control" name="Category">
    @foreach (var item in Model)
    {
        <option class="form-control" label="@item" value="@item" />
    }
</select>