Argument Exception for WorkflowManager.MessageWorkflow

Hi,

 I was trying to upload image files to album usign API in sitefinity. It was working fine for me. Now when i was trying on it again it is throwing the following exception:

An exception of type 'System.ArgumentException' occurred in Telerik.Sitefinity.dll but was not handled in user code

Additional information: Id cannot be Empty Guid

The following is the code which i face the issue:

public Guid CreateNewsItemAlbum(string parentAlbumTitle, string imageTitle, Stream imageStream, string imageExtension)
       
            //gets an instance of the LibrariesManager
            var manager = LibrariesManager.GetManager();
            LibrariesManager.GetManager().Provider.SuppressSecurityChecks = true;

            var childFolderTitle = DateTime.Now.Date.ToString("MMM dd yyyy");

            //creates an image album(library)
            var parentAlbum = manager.GetAlbums().Where(a => a.Title == parentAlbumTitle).FirstOrDefault();
            if (parentAlbum == null)
           
                var imagesAlbum = manager.CreateAlbum();
                imagesAlbum.Title = parentAlbumTitle;

                var url = Regex.Replace(parentAlbumTitle.ToLower(), @"[^\w\-\!\$\'\(\)\=\@\d_]+", "-");
                imagesAlbum.UrlName = url;
                imagesAlbum.ItemDefaultUrl = "/" + url;
                imagesAlbum.Urls.Add(new LibraryUrlData
               
                    Id = Guid.NewGuid(),
                    Url = imagesAlbum.ItemDefaultUrl,
                    ApplicationName = manager.Provider.ApplicationName
                );
                manager.SaveChanges();

                CreateFolderInAlbum(imagesAlbum, childFolderTitle, "Child folder title if parent album is null");
           
            else
           
                CreateFolderInAlbum(parentAlbum, childFolderTitle, "Child folder title if parent album is not null");
           
            Guid id  = Guid.NewGuid();
            UploadAlbumImages(parentAlbumTitle, childFolderTitle, imageTitle, imageStream, imageExtension, id);

            //Publish the Albums item. The live version acquires new ID.
            var bag = new Dictionary<string, string>();
            WorkflowManager.GetManager().Provider.SuppressSecurityChecks = true;
            bag.Add("ContentType", typeof(Telerik.Sitefinity.Libraries.Model.Image).FullName);
            var x = WorkflowManager.MessageWorkflow(id, typeof(Telerik.Sitefinity.Libraries.Model.Image), null, "Publish", false, bag);
            return id;
        //gets an instance of the LibrariesManager
            var manager = LibrariesManager.GetManager();
            LibrariesManager.GetManager().Provider.SuppressSecurityChecks = true;

            var childFolderTitle = DateTime.Now.Date.ToString("MMM dd yyyy");

            //creates an image album(library)
            var parentAlbum = manager.GetAlbums().Where(a => a.Title == parentAlbumTitle).FirstOrDefault();
            if (parentAlbum == null)
           
                var imagesAlbum = manager.CreateAlbum();
                imagesAlbum.Title = parentAlbumTitle;

                var url = Regex.Replace(parentAlbumTitle.ToLower(), @"[^\w\-\!\$\'\(\)\=\@\d_]+", "-");
                imagesAlbum.UrlName = url;
                imagesAlbum.ItemDefaultUrl = "/" + url;
                imagesAlbum.Urls.Add(new LibraryUrlData
               
                    Id = Guid.NewGuid(),
                    Url = imagesAlbum.ItemDefaultUrl,
                    ApplicationName = manager.Provider.ApplicationName
                );
                manager.SaveChanges();

                CreateFolderInAlbum(imagesAlbum, childFolderTitle, "Child folder title if parent album is null");
           
            else
           
                CreateFolderInAlbum(parentAlbum, childFolderTitle, "Child folder title if parent album is not null");
           
            Guid id  = Guid.NewGuid();
            UploadAlbumImages(parentAlbumTitle, childFolderTitle, imageTitle, imageStream, imageExtension, id);

            //Publish the Albums item. The live version acquires new ID.
            var bag = new Dictionary<string, string>();
            WorkflowManager.GetManager().Provider.SuppressSecurityChecks = true;
            bag.Add("ContentType", typeof(Telerik.Sitefinity.Libraries.Model.Image).FullName);
            var x = WorkflowManager.MessageWorkflow(id, typeof(Telerik.Sitefinity.Libraries.Model.Image), null, "Publish", false, bag);
            return id;​

Please find the attached screenshot of the exception.

I am not sure whats going wrong. Any body faced simlar issues ? 

Thanks, 

Anju Raman

Hi Anju,

It seems that some Id is coming null on your code. I would like kindly suggest you to put a breakpoint and determine where in what part of the code is the exception happening.

Best Regards,
Junior Dominguez
Telerik