Not only the current node will be in preview, but also all child nodes. So by clicking preview on the highest node in the tree it seems that you can run your entire site in preview.

Will do some more experiments :-).

Jeroen

Also make sure to upgrade to Umbraco 7.4.2 if you want to preview protected pages: http://issues.umbraco.org/issue/U4-4219#comment=67-27355

Jeroen

Preview works in the frontend, but I would also like preview to work in the backend. So if I'm in preview mode it also shows those URLs in the backoffice. For now I checked the Umbraco source and it looks like I can check if the preview cookie is available. Would that be enough?

Jeroen

Could you replace the ContentFinderByNiceUrl with your own version that hits the ContentService rather than the cache? https://our.umbraco.org/Documentation/Reference/Routing/Request-Pipeline/IContentFinder

This looks cool!

Can you share the code for this?

Since preview for all content only works if you click preview on the highest node I wrote some code for that which can be triggered from every node.

You can call this from a custom property editor. It will get the highest node and use that for preview.

/// <summary>
/// The url preview api controller.
/// </summary>
public class UrlPreviewApiController : UmbracoAuthorizedApiController
{
    /// <summary>
    /// Update preview for the entire website.
    /// </summary>
    /// <returns>
    /// The <see cref="HttpResponseMessage"/>.
    /// </returns>
    [System.Web.Http.HttpGet]
    public HttpResponseMessage UpdatePreview()
    {
        var result = new HttpResponseMessage(HttpStatusCode.OK);

        // Get the highest node in the tree.
        // If we use this id for preview it will preview the entire website.
        var websiteId = this.GetWebsiteId();

        // Update the preview so we can see the saved changes.
        this.UpdatePreviewContext(websiteId);

        return result;
    }

    /// <summary>
    /// Checks if the user is currently in preview mode and if so will update the preview content for this item.
    /// If it's not in preview a new one will be created.
    /// </summary>
    /// <param name="contentId">
    /// The content id.
    /// </param>
    /// <remarks>
    /// This code uses some obsolete methods, but parts are copied from the Umbraco source and we keep it the same.
    /// </remarks>
    private void UpdatePreviewContext(int contentId)
    {
        // Get the preview id from the cookie.
        var previewId = this.Request.GetPreviewCookieValue();

        // If we have a GUID from the cookie use that.
        Guid id;
        var existingPreview = Guid.TryParse(previewId, out id);

        if (!existingPreview)
        {
            // If we don't have GUID from the cookie yet create a new one.
            id = Guid.NewGuid();
        }

        // Create the preview.
        var d = new Document(contentId);
        var pc = new PreviewContent(this.UmbracoUser, id, false);
        pc.PrepareDocument(this.UmbracoUser, d, true);
        pc.SavePreviewSet();

        if (!existingPreview)
        {
            // Create a new preview cookie if we don't have one.
            pc.ActivatePreviewCookie();
        }
    }

    /// <summary>
    /// Get the id of the website node. Don't use the ContentRepository because that only works with published content.
    /// </summary>
    /// <returns>
    /// The id.
    /// </returns>
    private int GetWebsiteId()
    {
        var websiteContentType = this.Services.ContentTypeService.GetContentType(Website.ModelTypeAlias);
        var website = this.Services.ContentService.GetContentOfContentType(websiteContentType.Id).FirstOrDefault();

        if (website != null)
        {
            return website.Id;
        }

        return -1;
    }
}

Jeroen

Has anyone ever tested if preview works when multiple users try it at the same time? It uses cookies so it should work. When I try to preview in 2 different browers the preview doesn't work anymore in the first browser when I open preview in the second browser.

Jeroen

Is it simply because your 2nd browser that it doesn't work in doesn't have the preview cookie set?

Also pretty sure there's a setting somewhere to turn on full site preview... Or at least there was something along those lines at some point in time ;) i can see if i can find anything tomorrow if you don't beat me to it.

I blogged about how you can preview all the content. It also has a working example: http://24days.in/umbraco-cms/2016/umbraco-edge-case-stories/#preview

Jeroen

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