Umbraco Content SetValueByPreValue and SetValuesByPreValues extension methods

ContentExtensions.cs

using System.Linq;
using Umbraco.Core;
using Umbraco.Core.Models;

namespace My.Umbraco.Extensions
{
    public static class ContentExtensions
    {
        /// <summary>
        /// Sets the value of a property to the PreValue ID for a given preValue.
        /// </summary>
        /// <param name="content"></param>
        /// <param name="propertyTypeAlias"></param>
        /// <param name="preValue"></param>
        public static void SetValueByPreValue(this IContentBase content, string propertyTypeAlias, string preValue)
        {
            var dataTypeId = content.Properties[propertyTypeAlias].PropertyType.DataTypeDefinitionId;
            var prevalues = ApplicationContext.Current.Services.DataTypeService.GetPreValuesCollectionByDataTypeId(dataTypeId);
            int preValueId = prevalues.PreValuesAsDictionary.Values.FirstOrDefault(x => x.Value == preValue).Id;
            content.SetValue(propertyTypeAlias, preValueId);
        }
        
        /// <summary>
        /// Sets the value of a property to the list of PreValue IDs for a given list of PreValues
        /// </summary>
        /// <param name="content"></param>
        /// <param name="propertyTypeAlias"></param>
        /// <param name="preValues"></param>
        public static void SetValuesByPreValues(this IContentBase content, string propertyTypeAlias, string[] preValues)
        {
            var csv = new System.Text.StringBuilder();
            var dataTypeId = content.Properties[propertyTypeAlias].PropertyType.DataTypeDefinitionId;
            var prevalues = ApplicationContext.Current.Services.DataTypeService.GetPreValuesCollectionByDataTypeId(dataTypeId);
            foreach (var preValue in preValues)
            {
                int preValueId = prevalues.PreValuesAsDictionary.Values.FirstOrDefault(x => x.Value == preValue).Id;
                if (csv.Length > 0) csv.Append(",");
                csv.Append(preValueId);
            }
            content.SetValue(propertyTypeAlias, csv.ToString());
        }
    }
}