MVC学习 之 【HtmlHelper】篇

首先使用Asp.Net MVC可以不使用HtmlHelper,不过使用了HtmlHelper是可以节约很多时间的

一、标准HtmlHelper

.ActionLink

创建一个链接,但现在还不能创建一个带图片的链接

<%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" %><asp:ContentID="indexContent"ContentPlaceHolderID="MainContent"runat="server"><p>To learn more about this website, click the following link:<%= Html.ActionLink("About this Website","About")%></p></asp:Content>
"Aboud this Website”显示的内容,"About” Action的名字
生成的Html如下:
<a href="/Home/About">About this Website</a>
ActionLink可以添加接受很多参数

· linkText – 链接上的文字

· actionName – 链接目标的action名字

· routeValues – 通向action的route值

· controllerName – controller名字

· htmlAttributes – 链接的html属性

· protocol – 链接协议 (比如:https)

· hostname – 链接的Host名字 (比如:www.XXX.com)

 

如果想添加个图片链接,使用Url.Action:

<a href="<%= Url.Action("Delete") %>"><img src=http://www.cnblogs.com/lel1447/xxx.jpg" alt="Delete" style="border:0px"/></a>

Html Helper还可以生成很多Html控件:

· BeginForm()

· CheckBox()

· DropDownList()

· EndForm()

· Hidden()

· ListBox()

· Password()

· RadioButton()

· TextArea()

· TextBox()

 

基本上看名字就知道了,看例子:

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<MvcApplication1.Models.Customer>" %><asp:ContentID="Content2"ContentPlaceHolderID="MainContent"runat="server"><%= Html.ValidationSummary("Create was unsuccessful. Please correct the errors and try again.")%><%using(Html.BeginForm()) {%><fieldset><legend>Register</legend><p><labelfor="FirstName">First Name:</label><%= Html.TextBox("FirstName")%><%= Html.ValidationMessage("FirstName","*")%></p><p><labelfor="LastName">Last Name:</label><%= Html.TextBox("LastName")%><%= Html.ValidationMessage("LastName","*")%></p><p><labelfor="Password">Password:</label><%= Html.Password("Password")%><%= Html.ValidationMessage("Password","*")%></p><p><labelfor="Password">Confirm Password:</label><%= Html.Password("ConfirmPassword")%><%= Html.ValidationMessage("ConfirmPassword","*")%></p><p><labelfor="Profile">Profile:</label><%= Html.TextArea("Profile",new{cols=60, rows=10})%></p><p><%= Html.CheckBox("ReceiveNewsletter")%><labelfor="ReceiveNewsletter"style="display:inline">Receive Newsletter?</label></p><p><inputtype="submit"value="Register"/></p></fieldset><%}%></asp:Content>

其中Html.BeginForm()和EndForm()要单独说一下:默认情况下,它会指向和自己相同的action,但也会接受不同参数改变指向的action:

· routeValues -- 如上

· actionName – 如上

· controllerName – 如上

· method – 只能使用POST和GET,必须使用javascript

· htmlAttributes – 如上

 

.Encode(),这个就是替换<为&lt; >为&gt;等等

.AntiForgeryToken这个是为了抵御跨域攻击的。

<%= Html.AntiForgeryToken()%>

<inputname="__RequestVerificationToken"type="hidden"value="6tbg3PWU9oAD3bhw6jZwxrYRyWPhKede87K/PFgaw
6MI3huvHgpjlCcPzDzrTkn8"/>
helper会创建一个cookie和这个隐藏域的值相比较
在Controller中如下写代码就可以了:
usingSystem.Web.Mvc;namespaceMvcApplication1.Controllers
{publicclassBankController : Controller
{//// GET: /Bank/WithdrawpublicActionResult Withdraw()
{returnView();
}//// POST: /Bank/Withdraw[AcceptVerbs(HttpVerbs.Post)]
[ValidateAntiForgeryToken]publicActionResult Withdraw(decimalamount)
{// Perform. withdrawalreturnView();
}
}
}

创建自己的HTML Helpers

usingSystem;usingSystem.Web.Mvc;namespaceHelpers
{publicstaticclassSubmitButtonHelper
{/// <summary>/// Renders an HTML form. submit button/// </summary>publicstaticstringSubmitButton(thisHtmlHelper helper,stringbuttonText)
{returnString.Format("<input type=\"submit\" value=\"{0}\" />", buttonText);
}
}
}
posted @ 2009-04-29 09:16  Nova lan  阅读(724)  评论(2编辑  收藏  举报
Nova Lan