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" }));
}