How to do pagination in C# / MVC without Entity Framework?
Question
As the title says, how can I have a pagination without Entity Framework? I made my database without Entity Framework, and it involves just DLL libraries. I've been searching far and wide but I only see pagination tutorials / entries using Entity Framework, ADO.Net, and the like.
Thank you very much in advance!
EDIT:
Thank you very much for your answers. To be more specific, I will show my code right now:
List.cshtml(view)
@model IEnumerable<OverTime.Models.UserModel>
@{
ViewBag.Title = "List of Users";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>List of Users</h2>
<p>
@Html.ActionLink("Add User", "CreateUser")
</p>
<body>
<table class="table">
<tr>
<th>
@Html.DisplayNameFor(model => model.username)
</th>
<th>
@Html.DisplayNameFor(model => model.email)
</th>
<th>
@Html.DisplayNameFor(model => model.password)
</th>
<th></th>
</tr>
@foreach (var item in Model)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.username)
</td>
<td>
@Html.DisplayFor(modelItem => item.email)
</td>
<td>
@Html.DisplayFor(modelItem => item.password)
</td>
<td>
@Html.ActionLink("Edit", "EditUser", new { id = item.usr_Id }) |
@Html.ActionLink("Details", "Details", new { id = item.usr_Id }) |
@Html.ActionLink("Delete", "DeleteUser", new { id = item.usr_Id })
</td>
</tr>
}
</table>
@if (Model.Pager.EndPage > 1)
{
<ul class="pagination">
@if (Model.Pager.CurrentPage > 1)
{
<li>
<a href="~/Home/Index">First</a>
</li>
<li>
<a href="~/Home/List?page=@(Model.Pager.CurrentPage - 1)">Previous</a>
</li>
}
@for (var page = Model.Pager.StartPage; page <= Model.Pager.EndPage; page++)
{
<li class="@(page == Model.Pager.CurrentPage ? "active" : "")">
<a href="~/Home/List?page=@page">@page</a>
</li>
}
@if (Model.Pager.CurrentPage < Model.Pager.TotalPages)
{
<li>
<a href="~/Home/List?page=@(Model.Pager.CurrentPage + 1)">Next</a>
</li>
<li>
<a href="~/Home/List?page=@(Model.Pager.TotalPages)">Last</a>
</li>
}
</ul>
}
</body>
UserController.cs (Controller)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using OT_lib.Interfaces;
using OT_lib.BusinessLayer;
using OT_lib.Entity;
using OverTime.Models;
using PagedList;
namespace OverTime.Controllers
{
public class UserController : Controller {
[HttpGet]
public ActionResult Pagination(int? page)
{
var dummyItems = Enumerable.Range(1, 150).Select(x => "Items" + x);
var pager = new Pager(dummyItems.Count(), page);
var viewModel = new UserModel()
{
Items = dummyItems.Skip((pager.CurrentPage - 1) * pager.PageSize).Take(pager.PageSize),
Pager = pager
};
return View(viewModel);
}
public ActionResult List(UserModel usermodel)
{
//UserBusinessLayer userService = new UserBusinessLayer("sqlconn");
IUserInterface userService = new UserBusinessLayer("sqlConn");
List<UserEntity> list = userService.GetAllUsers();
List<UserModel> listModel = new List<UserModel>();
foreach (var item in list)
{
listModel.Add(new UserModel()
{
email = item.email,
password = item.password,
username = item.username,
usr_Id = item.usr_Id
});
}
return View(listModel);
}
public ActionResult CreateUser()
{
return View();
}
[HttpPost]
public ActionResult CreateUser(UserModel userModel)
{
//UserBusinessLayer userService = new UserBusinessLayer("sqlConn");
IUserInterface userService = new UserBusinessLayer("sqlConn");
userService.CreateUser(new UserEntity()
{
username = userModel.username,
email = userModel.email,
password = userModel.password
});
return RedirectToAction("List");
}
public ActionResult EditUser(int id)
{
//UserBusinessLayer userService = new UserBusinessLayer("sqlconn");
IUserInterface userService = new UserBusinessLayer("sqlConn");
UserModel userModel = new UserModel();
try
{
UserEntity userEntity = userService.GetUserId(id);
userModel.usr_Id = userEntity.usr_Id;
userModel.email = userEntity.email;
userModel.username = userEntity.username;
userModel.password = userEntity.password;
}
catch (Exception ex)
{
throw ex;
}
return View(userModel);
}
//Update user info
[HttpPost]
public ActionResult EditUser(UserModel userModel)
{
//UserBusinessLayer userService = new UserBusinessLayer("sqlConn");
IUserInterface userService = new UserBusinessLayer("sqlConn");
userService.EditUser(new UserEntity()
{
usr_Id = userModel.usr_Id,
username = userModel.username,
email = userModel.email,
password = userModel.password
});
return RedirectToAction("List");
}
public ActionResult DeleteUser(int id)
{
//UserBusinessLayer userService = new UserBusinessLayer("sqlconn");
IUserInterface userService = new UserBusinessLayer("sqlConn");
UserModel userModel = new UserModel();
try
{
UserEntity userEntity = userService.GetUserId(id);
userModel.usr_Id = userEntity.usr_Id;
userModel.email = userEntity.email;
userModel.username = userEntity.username;
userModel.password = userEntity.password;
}
catch (Exception ex)
{
throw ex;
}
return View(userModel);
}
[HttpPost, ActionName("DeleteUser")]
public ActionResult DeleteUserConfirmed(int id)
{
//UserBusinessLayer userService = new UserBusinessLayer("sqlconn");
IUserInterface userService = new UserBusinessLayer("sqlConn");
try
{
userService.DeleteUser(id);
}
catch (Exception eDelete)
{
throw eDelete;
}
return RedirectToAction("List");
}
public ActionResult Details(int id)
{
//UserBusinessLayer userService = new UserBusinessLayer("sqlconn");
IUserInterface userService = new UserBusinessLayer("sqlConn");
UserModel userModel = new UserModel();
try
{
UserEntity userEntity = userService.GetUserId(id);
userModel.usr_Id = userEntity.usr_Id;
userModel.email = userEntity.email;
userModel.username = userEntity.username;
userModel.password = userEntity.password;
}
catch (Exception ex)
{
throw ex;
}
return View(userModel);
}
}
}
UserModel.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;
using System.Web.Mvc;
namespace OverTime.Models
{
public class UserModel
{
public IEnumerable<string> Items { get; set; }
public Pager Pager { get; set; }
public int usr_Id { get; set; }
[Display(Name = "Username")]
[Required(ErrorMessage="Username is required")]
[RegularExpression(@"^[a-zA-Z0-9]+$", ErrorMessage = "user name must be combination of letters and numbers only.")]
public string username { get; set; }
[Display(Name = "Email")]
[Required(ErrorMessage = "Email is required")]
[EmailAddress(ErrorMessage="Invalid email address")]
public string email { get; set; }
[Display(Name = "Password")]
[Required(ErrorMessage = "Password is required")]
[Remote("CheckEmail", "Account")]
public string password { get; set; }
[Display(Name = "Confirm Password")]
[Required(ErrorMessage = "Confirmation of password is required")]
//[Compare("password", ErrorMessage="Passwords do not match")]
public string confirmPassword { get; set; }
}
public class Pager
{
public Pager(int totalItems, int? page, int pageSize = 10)
{
var totalPage = (int)Math.Ceiling((decimal)totalItems / (decimal)pageSize);
var currentPage = page != null ? (int)page : 1;
var startPage = currentPage - 5;
var endPage = currentPage + 4;
if (startPage <= 0)
{
endPage -= (startPage - 1);
startPage = 1;
}
if (endPage > totalPage)
{
endPage = totalPage;
if (endPage > 10)
{
startPage = endPage - 9;
}
}
TotalItems = totalItems;
CurrentPage = currentPage;
PageSize = pageSize;
TotalPages = totalPage;
StartPage = startPage;
EndPage = endPage;
}
public int TotalItems { get; private set; }
public int CurrentPage { get; private set; }
public int PageSize { get; private set; }
public int TotalPages { get; private set; }
public int StartPage { get; private set; }
public int EndPage { get; private set; }
}
}
I am facing this error:
I am following this tutorial: ASP.NET MVC - Pagination Example with Logic like Google
What should I do? Thank you once again in advance!
2 answers
solution1
0 2018-01-19 03:17:26
If you use SQL Server 2012, then you can use OFFSET and FETCH .
Below sample will skip first 10 rows and return next 5 rows.
SELECT First Name + ' ' + Last Name
FROM Employees
ORDER BY First Name
OFFSET 10 ROWS FETCH NEXT 5 ROWS ONLY;
https://technet.microsoft.com/en-us/library/gg699618(v=sql.110).aspx
solution2
0 ACCPTED 2018-01-19 03:29:21
If you use Sql server 2012+ you can use the new syntax
SELECT * FROM tb ORDER BY id DESC OFFSET {pagesize * pageIndex} ROWS FETCH NEXT { pagesize } ROWS ONLY
note : order by is required , the { } is not sql ,it is the variable you shoud provide
if you use sql server 2012- you need to use the old Row_Number function, which can be find here
MySql and Sqlite is much simple , it use limit offset and do not reqire order by
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