Hello, I have created an MVC Module. In that module I have created StudentController, StudentManager, Student Model.  The model has First Name, Last Name, address and so forth.  When I install my module it works fine, I can add items. The issue I am having is that as soon as I add an item I get the following error: "Error: MVCModule1 is currently unavailable. DotNetNuke.Services.Exceptions.ModuleLoadException: Value cannot be null. Parameter name: source ---> System.ArgumentNullException: Value cannot be null. Parameter name: source at System.Linq.Enumerable.Count[TSource](IEnumerable`1 source) at ASP._Page_DesktopModules_MVC_MVCModule1_Views_Student_Index_cshtml.Execute() in c:\websites\dnndev.me\DesktopModules\DNNModules\MVCModule1\Views\Student\Index.cshtml:line ". After debugging I see that function GetItems()  from the StudentManager is returning null. When I delete the row in the database the module works fine, but when I try to add a new student I still get the same error. I have try to find out why GetItems returns null when there is a row in the database.

 

public IEnumerable<Student> GetItems(int moduleId)
        {
            IEnumerable<Student> t;
            using (IDataContext ctx = DataContext.Instance())
            {
                var rep = ctx.GetRepository<Student>();
                t = rep.Get(moduleId);
            }
            return t;
        }

 

I have uploaded my code here

 

Thank you for your help...

What was the fix?

---

Will Strohl

Upendo Ventures DNN experts since 2003 Official provider of the Hotcakes Commerce Cloud and SLA support