LINQ TO SQL ASP.NET MVC - Simple paged Gridview
Every application that works with any kind of data requires paging. In C# WebForms and WinForms you can use Gridviews, Pagers and so on but sometimes project requires different design where you can't use these or when you are working with ASP.NET MVC.So lets say you have SQL database with 1000 rows and now you need to diplay it in you custom made gridView, html table, divs..etc but you also need way to show more pages to users.
Assuming you are already know Linq To Sql and ASP.NET MVC,
Here is method for grabbing products from database using Linq To Sql:
public
static
PaginatedList<Product>
GetProducts(int
page, int
pageSize)
{
using
(ProductDataContext
context = new
ProductDataContext())
{
var
query = from
p in
context.Products select
p;
var
paginatedProducts = new
PaginatedList<Product>(query,
page, pageSize);
return
paginatedProducts;
}
}
Here is my custom class that extends generic List called PaginatedList, this class can be used with any database data retrival techique:
public
class PaginatedList
: List
{
public
int
PageIndex { get;
private
set;
}
public
int
PageSize { get;
private
set;
}
public
int
TotalCount { get;
private
set;
}
public
int
TotalPages { get;
private
set;
}
public
List<int>
PreviousPages { get;
private
set;
}
public
List<int>
NextPages { get;
private
set;
}
public
PaginatedList(IQueryable
source, int
pageIndex, int
pageSize)
{
PageIndex
= pageIndex;
PageSize
= pageSize;
TotalCount
= source.Count();
TotalPages
= (int)Math.Ceiling(TotalCount
/ (double)PageSize);
this.AddRange(source.Skip((pageIndex
- 1) * PageSize).Take(PageSize));
PreviousPages
= new
List<int>();
NextPages
= new
List<int>();
for
(int
i = 6; i >= 1; i--)
{
if
((pageIndex - i) >= 1)
PreviousPages.Add(pageIndex
- i);
}
for
(int
i = 1; i < 6 && (i + pageIndex) <= TotalPages; i++)
{
NextPages.Add(pageIndex
+ i);
}
}
public
bool
HasPreviousPage
{
get
{
return
(PageIndex > 1);
}
}
public
bool
HasNextPage
{
get
{
return
(PageIndex + 1 <= TotalPages);
}
}
}
Custom GridView in ASP.NET C# MVC Usage Example:
Controller
public
ActionResult Index(int
page = 1, int size = 100)
{
var
products = ProductsManipulation.Products(page,
size);
return
View(products);
}
View
@model
PaginatedList<Product>
@{
ViewBag.Title
= "Index";
}
<table
style="border:1px
solid Gray; width:100%;">
<tr>
<td>Product
Nametd>
<td>Product
Pricetd>
tr>
@foreach
(var
product in
Model)
{
<tr>
<td>@product.Nametd>
<td>@product.Pricetd>
tr>
}
table>
<div>
@if
(Model.HasPreviousPage)
{
<a
href="?page=@(Model.PageIndex-1)">Previousa>
}
@foreach
(var
pageNum in
Model.PreviousPages)
{
<a
href="?page=@(pageNum)">@pageNuma>
}
<span>@Model.PageIndexspan>
@foreach
(var
pageNum in
Model.NextPages)
{
<a
href="?page=@(pageNum)">@pageNuma>
}
@if
(Model.HasNextPage)
{
<a
href="?page=@(Model.PageIndex
+ 1)">Nexta>
}
div>
I will be adding more examples using T-SQL, EF and WebForms examples.
