MVC4视图
编写一个视图显示列表信息实例。
1、添加数据，通过ViewBag属性在视图中遍历数据。
控制器中代码如下
public ActionResult List() { var albums = new List<Album>(); for(int i = 0; i < 10; i++) { albums.Add(new Album {Title = "Product " + i}); } ViewBag.Albums = albums; return View(); }
视图部分代码
<ul> @foreach (Album a in (ViewBag.Albums as IEnumerable<Album>)) { <li>@a.Title</li> } </ul>
也可以通过动态数据的方式，但会失去智能感知
<ul> @foreach (dynamic p in ViewBag.Albums) { <li>@p.Title</li> } </ul>
在控制器中以模型的方式返回到视图中
public ActionResult List() { var albums = new List<Album>(); for (int i = 0; i < 10; i++) { albums.Add(new Album {Title = "Album " + i}); } return View(albums); }
引入模型数据类型方式。
@model IEnumerable<MvcApplication1.Models.Album> <ul> @foreach (Album p in Model) { <li>@p.Title</li> } </ul>
用using引入模型，定义数据模型类型，与上一中方式结果相同。
@using MvcApplication1.Models @model IEnumerable<Album> <ul> @foreach (Album p in Model) { <li>@p.Title</li> } </ul>
视图中写C#代码
@{ // this is a block of code. For demonstration purposes, // we'll create a "model" inline. var items = new string[] {"one", "two", "three"}; } <html> <head><title>Sample View</title></head> <body> <h1>Listing @items.Length items.</h1> <ul> @foreach(var item in items) { <li>The item name is @item.</li> } </ul> </body> </html>
@使用
<li>Item_@item.Length</li> <li>Item_@(item.Length)</li> <p> You should follow @@haacked, @@jongalloway, @@bradwilson, @@odetocode </p>
HTML Encoding防止脚本注入，html编码
@{ string message = "<script>alert('haacked!');</script>"; } <span>@message</span>
编码后的html代码
<span><script>alert('haacked!');</script></span>
通过RAW进行解码
@{ string message = "<strong>This is bold!</strong>"; } <span>@Html.Raw(message)</span>
解码后的HTML
<span><strong>This is bold!</strong></span>
HTML编码自动减轻XSS漏洞,通过编码用户输入要显示为HTML,但它在JavaScript不能解析。
<script type="text/javascript"> $(function () { var message = 'Hello @ViewBag.Username'; $("#message").html(message).show('slow'); }); </script>
可以通过@Ajax.JavaScriptStringEncode(ViewBag.Username)
<script type="text/javascript"> $(function () { var message = 'Hello @Ajax.JavaScriptStringEncode(ViewBag.Username)'; $("#message").html(message).show('slow'); }); </script>
Code Blocks代码块
@foreach(var item in stuff) { <li>The item name is @item.</li> }
@foreach(var item in stuff) {<li>The item name is @item.</li>}
<% foreach(var item in stuff) { %> <li>The item name is <%: item %>.</li> <% } %>
@{
string s = "One line of code.";
ViewBag.Title "Another line of code";
}
@{Html.RenderPartial("SomePartial");}
视图语法例子
隐式代码表达式
Razor <span>@model.Message</span>
Web Forms <span><%: model.Message %></span>
显示代码表达式
RAZOR <span>ISBN@(isbn)</span>
Web Forms <span>ISBN<%: isbn %></span>
Razor <span>@Html.Raw(model.Message)</span>
Web Forms <span><%: Html.Raw(model.Message) %></span>
or
<span><%= model.Message %></span>
代码块
Razor @{
int x = 123;
string y = ˝because.˝;
}
Web Forms <%
int x = 123;
string y = "because.";
%>
结合文本标记
Razor @foreach (var item in items) {
<span>Item @item.Name.</span>
}
Web Forms <% foreach (var item in items) { %>
<span>Item <%: item.Name %>.</span>
<% } %>
混合代码和纯文本
Razor @if (showMessage) {
<text>This is plain text</text>
}
or
@if (showMessage) {
@:This is plain text.
}
Web Forms <% if (showMessage) { %>
This is plain text.
<% } %>
转义代码分隔符
Razor My Twitter Handle is @haacked
or
My Twitter Handle is @@haacked
Web Forms <% expression %> marks a code
nugget.
注释代码
Razor @*
This is a multiline server side comment.
@if (showMessage) {
<h1>@ViewBag.Message</h1>
}
All of this is commented out.
*@
Web Forms <%--
This is a multiline server side comment.
<% if (showMessage) { %>
<h1><%: ViewBag.Message %></h1>
<% } %>
All of this is commented out.
--%>
调用泛型方法
Razor @(Html.SomeMethod<AType>())
Web Forms <%: Html.SomeMethod<AType>() %>
