ASP.NET MVC 3 Beta初体验之WebGrid

    ASP.NET MVC 3 Beta中除了推出一种新的视图引擎Razor。还推出了几种新的HtmlHelper。我比较关注的是WebGrid，这篇文章将介绍一下WebGrid的使用。WebGrid提供了分页和排序的功能，在此之前在MVC中分页和排序时需要自己去写的。这篇文章将分别介绍在aspx视图引擎和Razor视图引擎中如何使用它。

    我通过ADO.NET Entity Data Model从NORTHWND的Products中表中取数据。在Controller中取数据：

public class HomeController : Controller
{
public ActionResult Index()
{
NORTHWNDEntities entity = new NORTHWNDEntities();
return View( entity.Products.ToList());
}
}

在aspx视图引擎中使用WebGrid代码如下：

< div id ="grid" >
<% var grid = new WebGrid(source: Model, defaultSort: " ProductName " , rowsPerPage: 5 ); %>
<% = grid.GetHtml(
tableStyle: " grid " ,
headerStyle: " head " ,
alternatingRowStyle: " alt " ,
columns: grid.Columns(
grid.Column(format: (item) => Html.ActionLink( " Edit " , " Edit " , new { id = item.ProductID })),
grid.Column(format: (item) => Html.ActionLink( " Delete " , " Delete " , null , new { onclick = string .Format( " deleteRecord('Employee', '{0}') " , item.ProductID), @class = " Delete " , href = " JavaScript:void(0) " })),
grid.Column( " ProductName " , " 产品名称 " ),
grid.Column( " QuantityPerUnit " , " 每单位数量 " ),
grid.Column( " UnitPrice " , " 单价 " ),
grid.Column( " UnitsInStock " , " 库存单位 " ),
grid.Column( " UnitsOnOrder " , " 订单单位 " ),
grid.Column( " ReorderLevel " , " 重新排序级别 " ),
grid.Column( " Discontinued " , " 已停产 " )
)
)


%>
</ div >

在Razor中使用WebGrid代码如下：

< div id ="grid" >
@{
var grid = new WebGrid(source: Model,
defaultSort: "ProductName",
rowsPerPage: 10);
}
@grid.GetHtml(
tableStyle: "grid",
headerStyle: "head",
alternatingRowStyle: "alt",
columns: grid.Columns(
grid.Column(format: (item) => Html.ActionLink("Edit", "Edit", new { id = item.ProductID })),
grid.Column(format: (item) => Html.ActionLink("Delete", "Delete", null, new { onclick = string.Format("deleteRecord('Product', '{0}')", item.ProductID), @class = "Delete", href = "JavaScript:void(0)" })),
grid.Column("ProductName","产品名称"),
grid.Column("QuantityPerUnit","每单位数量"),
grid.Column("UnitPrice","单价"),
grid.Column("UnitsInStock", "库存单位"),
grid.Column("UnitsOnOrder","订单单位"),
grid.Column("ReorderLevel","重新排序级别"),
grid.Column("Discontinued","已停产")
)
)
</ div >

WebGrid构造函数如下：

        public WebGrid(IEnumerable<dynamic> source, IEnumerable<string> columnNames = null, string defaultSort = null, int rowsPerPage = 10, bool canPage = true, bool canSort = true, string ajaxUpdateContainerId = null, string fieldNamePrefix = null, string pageFieldName = null, string selectionFieldName = null, string sortFieldName = null, string sortDirectionFieldName = null);

常见参数意思是：

1、source 表示数据源

2、columnNames表示显示的列

3、defaultSort 默认按什么排序

4、rowsPerPage 每页多少行数据

5、canPage 是否能排序

 

上面两段代码的意思是定义了一个既分页又能排序的grid。

运行：

在看看两个view的完整代码：

aspx：

<% @ Page Title = "" Language = " C# " MasterPageFile = " ~/Views/Shared/Site.Master " Inherits = " System.Web.Mvc.ViewPage<List<WebGridAspx.Models.Products>> " %>

< asp:Content ID = " Content1 " ContentPlaceHolderID = " TitleContent " runat = " server " >
产品列表
</ asp:Content >

< asp:Content ID = " Content2 " ContentPlaceHolderID = " MainContent " runat = " server " >
< script type = " text/javascript " >
function deleteRecord(a, b) {
alert( " 删除: " + b);
}
</ script >
< h2 > 产品列表 </ h2 >
< div id = " grid " >
<% var grid = new WebGrid(source: Model, defaultSort: " ProductName " , rowsPerPage: 5 ); %>
<%= grid.GetHtml(
tableStyle: " grid " ,
headerStyle: " head " ,
alternatingRowStyle: " alt " ,
columns: grid.Columns(
grid.Column(format: (item) => Html.ActionLink( " Edit " , " Edit " , new { id = item.ProductID })),
grid.Column(format: (item) => Html.ActionLink( " Delete " , " Delete " , null , new { onclick = string .Format( " deleteRecord('Employee', '{0}') " , item.ProductID), @class = " Delete " , href = " JavaScript:void(0) " })),
grid.Column( " ProductName " , " 产品名称 " ),
grid.Column( " QuantityPerUnit " , " 每单位数量 " ),
grid.Column( " UnitPrice " , " 单价 " ),
grid.Column( " UnitsInStock " , " 库存单位 " ),
grid.Column( " UnitsOnOrder " , " 订单单位 " ),
grid.Column( " ReorderLevel " , " 重新排序级别 " ),
grid.Column( " Discontinued " , " 已停产 " )
)
)


%>
</ div >


</ asp:Content >

Razor：

代码

@model List < WebGridRazor.Models.Products >
@{
View.Title = " 产品列表 " ;
}

< p >
< h2 > 产品列表 </ h2 >
< div id = " grid " >
@{

var grid = new WebGrid(source: Model,
defaultSort: " ProductName " ,
rowsPerPage: 3 );
}
@grid.GetHtml(
tableStyle: " grid " ,
headerStyle: " head " ,
alternatingRowStyle: " alt " ,
columns: grid.Columns(
grid.Column(format: (item) => Html.ActionLink( " Edit " , " Edit " , new { id = item.ProductID })),
grid.Column(format: (item) => Html.ActionLink( " Delete " , " Delete " , null , new { onclick = string .Format( " deleteRecord('Product', '{0}') " , item.ProductID), @class = " Delete " , href = " JavaScript:void(0) " })),
grid.Column( " ProductName " , " 产品名称 " ),
grid.Column( " QuantityPerUnit " , " 每单位数量 " ),
grid.Column( " UnitPrice " , " 单价 " ),
grid.Column( " UnitsInStock " , " 库存单位 " ),
grid.Column( " UnitsOnOrder " , " 订单单位 " ),
grid.Column( " ReorderLevel " , " 重新排序级别 " ),
grid.Column( " Discontinued " , " 已停产 " )
)
)
</ div >
</ p >

Razor去掉了那些模板页的代码，使代码看起来更整洁。比较喜欢Razor。

总结：本文很简单，介绍了一下ASP.NET MVC 3 Beta中新功能WebGrid，由于这种方式WebGrid是在内存中分页和排序的，所以不适合大数据量。

代码：http://files.cnblogs.com/zhuqil/MvcApplication11.rar

原文链接： http://www.cnblogs.com/zhuqil/archive/2010/10/17/ASP-NET-MVC-3-Beta-WebGrid.html