Retrieve specific record from database in MVC - asp.net-mvc

Please look at my sample code below:
public class LoginModel
{
[Key]
public int LoginId { get; set; }
public string UserName { get; set; }
public string Password { get; set; }
}
public class RegisterModel
{
[Key]
public int RegisterId { get; set; }
public string UserName { get; set; }
public string Password { get; set; }
public string Email { get; set; }
}
public class Cart
{
[Key]
public int RecordId { get; set; }
public string CartId { get; set; }
public int ProductId { get; set; }
public int Count { get; set; }
}
There are many records in the cart table added by many users.
But i want to show the own record of a user from the cart table if he is logged in..how can I do this??

You have to insert a foreign-key property to your Cart class:
public class UserModel
{
[Key]
public int LoginId { get; set; }
public string UserName { get; set; }
public string Password { get; set; }
}
public class Cart
{
[Key]
public int RecordId { get; set; }
public string CartId { get; set; }
public int ProductId { get; set; }
public int Count { get; set; }
public virtual UserModel User { get; set; } // <-- added
}
Then you can use LINQ to query the Cart-items for a specific user:
var cartItems = dbContext.Cart.Where(a => a.User == loggedInUser);

var query = from a in db.Pages
where a.title.Contains(myTitle)
select a;
var item=query.FirstOrDefault();
if(item!=null)
return View(item);
else
return View("NotFound");

Related

EnumerableExtensions.Join inaccessible due to its protection level

am getting a Enumerable Extensions join is inaccessible due to its protection level error. I am using EF Core for database connections. How to perform joins using LINQ ??
var seatBookings =(
from sb in Context.SeatBookings
join bd in Context.BookingDetails on sb.BookingId
equals bd.Id
where bd.ShowId == showId
select sb
).ToList();
public partial class SeatBookings
{
public int Id { get; set; }
public int? BookingId { get; set; }
public int SeatNumber { get; set; }
public BookingDetails Booking { get; set; }
}
public partial class BookingDetails
{
public BookingDetails()
{
SeatBookings = new HashSet<SeatBookings>();
}
public int Id { get; set; }
public int ShowId { get; set; }
public string Email { get; set; }
public string MobileNumber { get; set; }
public int TheaterId { get; set; }
public int BookedSeatsCount { get; set; }
public ShowDetails Show { get; set; }
public ICollection<SeatBookings> SeatBookings { get; set; }
}

ASP.NET MVC Check if User has already posted in this table

I'm gonna cut to the chase.
I'm creating a Survey platform, it has 3 models.
Model Survey, it has Many SurveyQuestion which has many SurveyAnswer.
(I can insert all of the values of these models but I dont think it is needed)
public class SurveyAnswer
{
[Key]
public int Id { get; set; }
public string Value { get; set; }
public string SubmittedBy { get; set; }
public int SurveyId { get; set; }
public int QuestionId { get; set; }
public virtual Survey Survey { get; set; }
public virtual SurveyQuestion Question { get; set; }
public string Comment { get; set; }
}
Now a problem I'm having is once someone created a survey and another person is starting it, he answers and that's it. How do I show that the next time he comes to an index page? How do I show that "you already submitted this survey"? Do I do that in Controller or in View? I would prefer to that in this action currently (it's a menu for all ongoing surveys).
[HttpGet]
public ActionResult Menu()
{
var survey = Mapper.Map<IEnumerable<Survey>, IEnumerable<SurveyViewModel>>(_unitOfWork.SurveyRepository.Get());
return View(survey.ToList());
}
Put all your validation rules to your AbstractValidator class.
[Validator(typeof(SurveyAnswerValidator))]
public class SurveyAnswer{
[Key]
public int Id { get; set; }
public string Value { get; set; }
public string SubmittedBy { get; set; }
public int SurveyId { get; set; }
public int QuestionId { get; set; }
public virtual Survey Survey { get; set; }
public virtual SurveyQuestion Question { get; set; }
public string Comment { get; set; }
}
public class SurveyAnswerValidator : AbstractValidator<SurveyAnswer>
{
public SurveyAnswerValidator()
{
//list your rules
RuleFor(x => x.SubmittedBy).Must(BeUnique).WithMessage("Already
submitted this survey");
}
private bool BeUnique(string submittedBy)
{
if(_context.SurveyAnswers.
FirstOrDefault(x => x.SubmittedBy == submittedBy) == null){
return true;
}
else{
return false;
}
}
}
If you want to check uniqueness in ViewModel you can use Remote.
public class SurveyAnswerVM{
[Key]
public int Id { get; set; }
public string Value { get; set; }
[Remote("HasSubmitted", "ControllerName")]
public string SubmittedBy { get; set; }
public int SurveyId { get; set; }
public int QuestionId { get; set; }
public virtual Survey Survey { get; set; }
public virtual SurveyQuestion Question { get; set; }
public string Comment { get; set; }
}
Where HasSubmitted is a method you may create in controller to return true if the user has submitted.
RemoteAttribute
https://msdn.microsoft.com/en-us/library/gg508808(VS.98).aspx
The best solution by vahdet (suggested in comments)
[Index("IX_AnswerQuestion", 2, IsUnique = true)]
[StringLength(36)]
public string SubmittedBy { get; set; }
public int SurveyId { get; set; }
[Index("IX_AnswerQuestion", 1, IsUnique = true)]
public int QuestionId { get; set; }

Column name 'ApplicationUserId' in table 'Tickets' is specified more than once

DB relationship:
1ApplicationUser : n Tickets
1ApplicationUser: n Activities
1Tickets:n Activites
I would like to design above database using code first. However,there's error warning
"Column name 'ApplicationUserId' in table 'Tickets' is specified more
than once."
However, I checked there's only one ApplicationUserId in Table Ticket as shown in below class.
Would anyone please help how to fix it? Thanks.
The entity class are as following:
Ticket Class
public class Ticket
{
public int ID { get; set; }
public Ticket()
{ TicketCreateDate = DateTime.Now; }
public DateTime TicketCreateDate { get; set; }
public int TicketCreateBy { get; set; }
public DateTime TicketCloseDate { get; set; }
public int TicketCloseBy { get; set; }
public DateTime LastTicketUpdateDate { get; set; }
public int LastUpdateBy { get; set; }//Ticket Last Update by
public DateTime TicketAssignedDate { get; set; }
public int TicketAssignedTo { get; set; }
public string TicketType { get; set; }
public string Priority { get; set; }// Ticket priority
public string TicketStatus { get; set; }
public string TicketDescription { get; set; }
public int DeviceUserID { get; set; }
public string DeviceBrand { get; set; }
public string DeviceType { get; set; }
public virtual ICollection<Activity> Activities { get; set; }
public int ApplicationUserID { get; set; }
public virtual ApplicationUser ApplicationUser { get; set; }
}
Acitivity Class
public class Activity
{
public int ID { get; set; }
public Activity()
{
CreatedTime = DateTime.Now;
}
public DateTime CreatedTime { get; set; }
public string ActivityDetails { get; set; }
public int ApplicationUserID { get; set; }
public virtual ApplicationUser ApplicationUser { get; set; }
public int TicketId { get; set; }
public virtual Ticket Ticket { get; set; }
}
ApplicationUser Class
public class ApplicationUser : IdentityUser
{
public virtual ICollection<Ticket> Tickets { get; set; }
public virtual ICollection<Activity> Activities { get; set; }
}

using stored procedure in code first

I have a code first model with 2 table :
public class Company
{
public int CompanyId { get; set; }
public string CompanyName { get; set; }
public string CompanyAddress { get; set; }
public virtual ICollection<User> User { get; set; }
}
public class User
{
public int UserId { get; set; }
public string UserName { get; set; }
public string Password { get; set; }
public virtual int CompanyId { get; set; }
public Company Company { get; set; }
}
I want select Company with User Object with Stored Procedure
SELECT a.*,u.* FROM [dbo].[Companies] as a
INNER JOIN dbo.Users u on u.CompanyId=a.CompanyId
CompanyDB c = new CompanyDB();
var cc = c.Database.SqlQuery<Company>("dbo.Company_Select")
My problem : cc.User is Null ???
First, you have virtual in the wrong place for User:
public class User
{
public int UserId { get; set; }
public string UserName { get; set; }
public string Password { get; set; }
public int CompanyId { get; set; }
public virtual Company Company { get; set; }
}
Second, why the stored procedure? When properly configured you can do:
var companiesWithUsers = db.Companys.Include(c => c.User).ToList();

asp.net using mvc 3 linq and join

i have a problem with my join in my asp.net .. i have two database tables.. named APPLICANT and Profile...they have the same fields.. meaning if the Last name in applicant is null the last name is already in profile table. I already connect my program to the applicant table.. but it have so many null fields that have to fetch from the profile data table.... sorry i'm new in asp.net ...
Here's my code in controller:
public View Result Index()
{
var applicants = (from a in db.APPLICANTs
select a).ToList();
return View(applicants);
}
heres my context:
public partial class APPLICANT
{
public int APPLICANT_ID { get; set; }
public Nullable<int> Profile_id { get; set; }
public string APPLICANT_LastName { get; set; }
public string APPLICANT_FirstName { get; set; }
public string APPLICANT_MiddleName { get; set; }
public string APPLICANT_Address { get; set; }
public string APPLICANT_City { get; set; }
public string APPLICANT_ZipCode { get; set; }
public string APPLICANT_Phone { get; set; }
public string APPLICANT_Email { get; set; }
}
public partial class Profile
{
public int PROFILE_ID { get; set; }
public string Applicant_LASTNAME { get; set; }
public string Applicant_FIRSTNAME { get; set; }
public string Applicant_MIDDLENAME { get; set; }
public string Applicant_EMAIL { get; set; }
public string Applicant_PHONE { get; set; }
public string Applicant_ADDRESS { get; set; }
public string Applicant_ZIPCODE { get; set; }
public string Applicant_CITY { get; set; }
}
thanks for those who can help my problem..

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