How to find out with which Sitecore site an item is associated?

Question

We have a multi-site solution (Site 1 and Site 2), and I need to be able to determine if an item for which we're getting the URL (in the LinkProvider, which is custom) belongs to the current context site (Sitecore.Context.Site), or is part of a different site. Is there a good way to do this?

Basically, we just need to be able to find out to which site the item is associated. We can do the comparison between that value and the current context site.

Answer 1

/// <summary>
/// Get the site info from the <see cref="SiteContextFactory"/> based on the item's path.
/// </summary>
/// <param name="item">The item.</param>
/// <returns>The <see cref="SiteInfo"/>.</returns>
public static SiteInfo GetSiteInfo(this Item item)
{
  return SiteContextFactory.Sites
    .Where(s => !string.IsNullOrWhiteSpace(s.RootPath) && item.Paths.Path.StartsWith(s.RootPath, StringComparison.OrdinalIgnoreCase))
    .OrderByDescending(s => s.RootPath.Length)
    .FirstOrDefault();
}