[转载]ASP.NET MVC 3 Beta之WebGrid的使用

[转载]ASP.NET MVC 3 Beta之WebGrid的使用 – 海纳百川 – 博客园.

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

作者:朱祁林
出处:http://zhuqil.cnblogs.com
本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。

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