Displays a list of preset values. Either a single value or multiple values (formatted as a collection of strings) can be returned.
Settings
Enable multiple choice
If enabled, editors will be able to select multiple values from the dropdown otherwise only a single value can be selected.
Prevalues
Prevalues are the options which are shown in the dropdown list. You can add, edit, or remove values here.
You can use dictionary items to translate the values of a Dropdown property editor in a multilingual setup. For more details, see the Creating a Multilingual Site article.
See the example below to see how a value can be added or changed programmatically. To update a value of a property editor you need the Content Service.
The example below demonstrates how to add values programmatically using a Razor view. However, this is used for illustrative purposes only and is not the recommended method for production environments.
@using Umbraco.Cms.Core.Services;@inject IContentService Services;@using Newtonsoft.Json@{ // Get access to ContentServicevar contentService = Services; // Create a variable for the GUID of the page you want to updatevar guid =Guid.Parse("32e60db4-1283-4caa-9645-f2153f9888ef"); // Get the page using the GUID you've definedvar content =contentService.GetById(guid); // ID of your page // Set the value of the property with alias 'categories'. content.SetValue("categories",JsonConvert.SerializeObject(new[] { "News" })); // Save the changecontentService.Save(content);}
Although the use of a GUID is preferable, you can also use the numeric ID to get the page:
@{ // Get the page using it's idvar content =contentService.GetById(1234); }
If Modelsbuilder is enabled you can get the alias of the desired property without using a magic string:
@using Umbraco.Cms.Core.PublishedCache;@inject IPublishedSnapshotAccessor _publishedSnapshotAccessor;@{ // Set the value of the property with alias 'categories' content.SetValue(Home.GetModelPropertyType(_publishedSnapshotAccessor, x => x.Categories).Alias, JsonConvert.SerializeObject(new[] { "News" }));
}