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How to define models for Database tables in C# without using Linq To DB?


By : Dima
Date : September 29 2020, 08:00 AM
will help you You can use Data Annotations in combination with Entity Framework to define your model classes.
A model would then look like this:
code :
[Table("your_table")]
public class Entity
{
  [Column("your_column")]
  public string Value {get; set;}
}


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How to create more complex models from many tables in asp.net mvc, linq


By : user1446287
Date : March 29 2020, 07:55 AM
With these it helps i have just tackled this problem where i had an orders table ( 1row) and an order items table ( many rows) and wanted to show 1 view - invoice!
here is an example:
code :
 ViewData["quoteid"] = quoteid;

        var model = new QuoteViewModel
        {
            quoteInfo = new_online_quote.SingleOrDefault(x => x.quoteid == Convert.ToInt32(quoteid)),
            quoteItems = new_quote_item.Find(x => x.quote_id == Convert.ToInt32(quoteid))
        };

        return View(model);
public class QuoteViewModel
{
    public new_online_quote quoteInfo { get; set; }
    public IEnumerable<new_quote_item> quoteItems { get; set; }
}
Inherits="System.Web.Mvc.ViewPage<namespace.Controllers.QuoteViewModel>"
Total Quote Cost <%=String.Format("{0:C}",Model.quoteInfo.totalcost) %> inc VAT @ 15%<br />

Doctrine (on Ubuntu): What command generate models from database without delete existing models?(I add new tables soo i


By : user2010360
Date : March 29 2020, 07:55 AM
wish of those help If you're using Doctrine 1, you'll need to make use of Migrations. Migrations can either be written manually, or auto-generated one of a few different commands:
code :
./doctrine generate-migration
./doctrine generate-migrations-db
./doctrine generate-migrations-models
./doctrine orm:schema-tool:update

Using 2 tables in a View in ASP.Net MVC (Returning 2 LINQ using different models?)


By : Akhil
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Two options you can consider.
Add an additional property in you view model for the collection of Role
code :
public IEnumerable<Role> Roles { get; set; }
var roles = db.Roles..... // your query
var vm = new UserViewModel()
{
    Roles = roles,
    Users = user.ToPagedList(pageNumber, pageSize)
};
return View(vm);
[ChildActionOnly]
public ActionResult FetchRoles()
{
    var model = ... // your query
    return PartialView(model);
}
@model IEnumerable<Role>
... // html to display roles
@{ Html.RenderAction("FetchRoles", "yourControllerName"); }

Is it possible to create view models by out of models created from database tables using entity framework DB first appro


By : Mido Adel
Date : March 29 2020, 07:55 AM
hop of those help? You are mixing two things here: Database Entities (Entity Data Model) & View Models which are two different concepts.
code :
namespace ZahidCarWash.Models.EF
{
    using System;
    using System.Collections.Generic;

    public partial class Services
    {
        public short ServiceID { get; set; }
        public string ServiceName { get; set; }
        public Nullable<decimal> ServicePrice { get; set; }
        public Nullable<System.DateTime> EntryDateTime { get; set; }
        public Nullable<bool> IsOwner { get; set; }
        public Nullable<decimal> Commission { get; set; }
    }
}
namespace ZahidCarWash.Models
{
    using System;
    using System.Collections.Generic;

    public class ServiceViewModel
    {
        public short ServiceID { get; set; }
        public string ServiceName { get; set; }
        public decimal ServicePrice { get; set; }
        public System.DateTime EntryDateTime { get; set; }
        public bool IsOwner { get; set; }
        public decimal Commission { get; set; }
    }
}
[HttpPost]
public JsonResult AddServices(ServiceViewModel model)
{
    if(model == null)
       return null;

    var addService = new Services(); 
    //Use Automapper for mapping view models to data entities
    addService.ServiceID = model.ServiceID ;  //Service Id should be auto incremented from database
    addService.ServiceName = model.ServiceName ;
    addService.ServicePrice = model.ServicePrice ;
    addService.EntryDateTime = model.EntryDateTime ;
    addService.IsOwner = model.IsOwner ;
    addService.Commission = model.Commission ;


    ServicesRepository servicesRep = new ServicesRepository();
    int i = 0;
    //i = ServicesRep.UpdateServices(UpdateServicesVM, out ReturnStatus, out ReturnMessage);

    //Don't write the data specific logic in controllers. Use Repository Pattern.
    ZahidCarWashDBEntities context = new ZahidCarWashDBEntities();
    context.Services.Add(addService);
    context.SaveChanges();
    return Json(new { ReturnMessageJSON = ReturnMessage, ReturnStatusJSON = ReturnStatus });  

django how to define models for existing many to many tables in postgresql database


By : user2434315
Date : March 29 2020, 07:55 AM
wish of those help Define the ManyToManyField on one of your models (e.g. Sample) specifying a through option as documented here:
code :
class Sample(models.Model):
    id = ...
    containers = models.ManyToManyField(Container, through='JoinSampleContainer', through_fields=('sample_id', 'container_id'),
        related_name='samples')
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