ComponentOne ASP.NET Web Forms Edition
Tutorials / Creating an Event Planning Application / Step 3 of 4: Creating the Models
Step 3 of 4: Creating the Models

In this step, you'll create the Models used in your application.

  1. From the Models folder, double-click the Event.cs file to open it.
    1. Check your references and make sure that they resemble the following:

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      using System;
      using System.Collections.Generic;
      using System.Data.Entity;
      using System.Linq;
      using System.Web;
    2. Add the following code below the namespace declaration:

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      public class EventObj
          {
              [Key]
              public int Id { get; set; }
              public string Subject { get; set; }
              public string Location { get; set; }
              public DateTime Start { get; set; }
              public DateTime End { get; set; }
              public string Description { get; set; }
              public bool AllDay { get; set; }
          }
  2. From the Models folder again, double-click the EventAction.cs file to open it.
    1. Check your references and make sure that they resemble the following:

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      using System;
      using System.Collections.Generic;
      using System.Data;
      using System.Linq;
      using System.Web;
    2. Add the following code below the namespace declaration:

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      public static class EventAction
          {
              private static EventPlannerEntities _eventDb = new EventPlannerEntities();
       
              internal static EventPlannerEntities GetEventDb()
              {
                  return new EventPlannerEntities();
              }
       
              public static IList<EventObj> GetEvents()
              {
                  return _eventDb.Events.ToList();
              }
       
              public static EventObj GetEventDetail(int id)
              {
                  return _eventDb.Events.Find(id);
              }
       
              public static EventObj Create()
              {
                  return new EventObj
                  {
                      Subject = "New event",
                      Start = DateTime.Today,
                      End = DateTime.Today.AddDays(1).AddSeconds(-1),
                      AllDay = false
                  };
              }
       
              public static void Add(EventObj eventObj)
              {
                  _eventDb.Events.Add(eventObj);
                  _eventDb.SaveChanges();
              }
       
              public static void Edit(EventObj eventObj)
              {
                  _eventDb.Entry(eventObj).State = EntityState.Modified;
                  _eventDb.SaveChanges();
              }
       
              public static void Delete(int id)
              {
                  EventObj eventObj = _eventDb.Events.Find(id);
                  _eventDb.Events.Remove(eventObj);
                  _eventDb.SaveChanges();
              }
          }
      }
  3. Double-click the last code file in the Models folder to open the EventPlannerEntities.cs file.
    1. Check the references and make sure that they resemble the following:

      To write code in C#

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      using System;
      using System.Collections.Generic;
      using System.Data.Entity;
      using System.Linq;
      using System.Web;
    2. Add the following code  below the namespace declaration:

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      public class EventPlannerEntities : DbContext
          {
              public DbSet<EventObj> Events { get; set; }
       
              public EventPlannerEntities()
              {
                  Database.CreateIfNotExists();
              }
          }
      }