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NerdDinner ASP Tutorial - Linq-to-Sql does not create collection for OneToMany


NerdDinner ASP Tutorial - Linq-to-Sql does not create collection for OneToMany

By : Nadim5772
Date : November 22 2020, 11:17 AM
Any of those help Couple of things to check:
Look in the NerdDinner.dbml's designer.cs file under the RSVP partial class definition and the Dinner partial class definition:
code :


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Following NerdDinner tutorial, don't allow duplicate

Following NerdDinner tutorial, don't allow duplicate


By : user1825908
Date : March 29 2020, 07:55 AM
will be helpful for those in need My sql database doesn't allow 2 records to be added with the same number. If I try to create a record with a previously used number or edit a record to use a previously used number, it doesn't allow it and returns to the edit/create page with an asterisk by the subcontract number field. I would like to add a Rule Violation for this so an appropriate message can be displayed. I tried adding this: , Try:
code :
db.subcontracts.Count(s => (s.subcontract_no == subcontract_no) 
    && (s.id != actually_edited_or_created_contract.id)).Count
ASP.NET MVC NerdDinner Tutorial question

ASP.NET MVC NerdDinner Tutorial question


By : user2165092
Date : March 29 2020, 07:55 AM
it fixes the issue AFAIK, MVC just tries to map the properties that are available in the POST to the parameter that it is provided. Because of that, it does not need to know about the type, it just creates the object with the default constructor and maps the form values to the created object - and that is what you get as the method's parameter value.
BTW: You'll also notice that the view output does not contain any reference to the Dinner or DinnerFormViewModel classes.
What is a good VB.NET ASP.NET MVC tutorial that isn't NerdDinner?

What is a good VB.NET ASP.NET MVC tutorial that isn't NerdDinner?


By : user2430477
Date : March 29 2020, 07:55 AM
Are these two statements equivalent? (from NerdDinner tutorial)

Are these two statements equivalent? (from NerdDinner tutorial)


By : MrHomer
Date : March 29 2020, 07:55 AM
wish help you to fix your issue They will perform exactly the same, yes - aside from the ordering. With a very slight change, they will compile into exactly the same code:
code :
// Extension method syntax
return from party in entities.Parties
       where party.PartyDate > DateTime.Now
       orderby party.PartyDate
       select party;

// Query expression
return entities.Parties
               .Where(party => party.PartyDate > DateTime.Now)
               .OrderBy(party => party.PartyDate);
System.NullReferenceException-NerdDinner Tutorial

System.NullReferenceException-NerdDinner Tutorial


By : Hfruud
Date : March 29 2020, 07:55 AM
it fixes the issue This action does not send a model to the view when you make a regular GET request.
code :
public ActionResult Index()
        {
            if (Request.IsAjaxRequest())
            {
                var dinners = _repository.FindAllDinners().Where(x => x.EventDate >= DateTime.Now).ToList();
                return Json(dinners);
            }
            else
            {
                return View();
            }
        }
public ActionResult Index()
{
    var dinners = _repository.FindAllDinners().Where(x => x.EventDate >= DateTime.Now).ToList();
    if (Request.IsAjaxRequest())
    {
        return Json(dinners);
    }
    else
    {
        return View(dinners);
    }
}
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