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I am attempting to follow the tutorial from C# corner about retrieving list history using CSOM and the syntax reads:

Lists.Lists listService = new Lists.Lists();

I get a compile error of:

The type or namespace ‘Lists’ could not be found (are you missing a using directive or an assembly reference?)

I am sure this is very simple and stupid but I can not find it!

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That's because the class Lists.Lists does'nt exist. And you can't instanciate the new object of type List, It's the Framwork that gives you the instance

To get a list of your site you will need to do somthing like :

ClientContext ctx = new ClientContext("URL of site ");
List list = ctx.Web.Lists.GetByTitle("Name of your list");
ctx.Load(list);
ctx.ExecuteQuery();

//Now your list is loaded
Console.WriteLine("NB of items : " + list.ItemCount);

Have a look a this link to have some Microsoft Exemple : Complete basic operations using SharePoint client library code

  • Your example is how I have been achieving such. However, I am trying to follow the tutorial here -> why is this done differently? Www.c-sharpcorner.com/UploadFile/safari/sharepoint-2013-retrieve-the-list-item-version-history-and/ – user2676140 Apr 23 '18 at 14:12
  • A yeah, I see. In this tuto, you use only webService asmx of SharePoint (be warn, this API is deprecated by microsoft : Choose the right API set in SharePoint. You should use the SharePoint CSOM (Client SharePoint Object Model) to dev your application – Nico Apr 23 '18 at 14:33
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    In your tuto, you will need to ADD your webService ( _vit_bin/lists.asmx ) to Visual Studio webService Reference, and discover it. How to: Add a Reference to a Web Service. And after that, Visual Studio will genere the class : Lists.Lists – Nico Apr 23 '18 at 14:36
  • Ah, thank you for the link about being deprecated. What would be the current way to achieve same result? – user2676140 Apr 23 '18 at 14:39
  • You could get the object of type "File" of your item (evry listItem have a File), and get the versions of your file. Have a look at this exemple : How to get list item version history of a custom list using Client Object Model – Nico Apr 23 '18 at 14:46
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Alternativly, if you are trying to use the SPOM to get a list, try doing it this way:

using(SPSite spSite = new SPSite(SPContext.Current.Web.Url)) //get site instance
{
    using(SPWeb spWeb = spSite.OpenWeb()) //get web instance
    {
        SPList spList = spWeb.Lists["YourListName"];  //get List
        SPListItemCollection collection = spList.GetItems();  //get List Items

        foreach(SPListItem item in collection) //loop through List Items
        {
             var title = item["Title"].ToString();//get a List Item title
        }
    }
}

List.List() is not part of the SharePoint Object Model or the .NET Framework for that matter. If you are using a custom webservice, than you need to install that webservice. Why would you want to use a webservice when you have SPOM and CSOM to get your lists and list data?

  • I am attempting to return versioned data from a rich text field that is set to append text and everything I have tried is not working. I will test you code and get back to you – user2676140 Apr 23 '18 at 20:43

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