该方法用于构建一个From表单的开始，他的构造方法为：
Html.BeginForm（"ActionName","ControllerName",FormMethod.method）
例如：
@using (Html.BeginForm("Index", "Home", FormMethod.Get, new { name = "nbform", id = "nbform" }))
@using(@Html.BeginForm("ImportStu", "ProSchool", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<text>选择上传文件：（工作表名为“Sheet1”，“电脑号”在A1单元格。）</text>
<input name="file" type="file" id="file" />
<input type="submit" name="Upload" value="批量导入第一批电脑派位名册" />
}
让请求地址不带id
@using (Html.BeginForm("AddDIYBillOfLading", "BillOfLading", new { id ="" }, FormMethod.Post, new { name = "myform", id = "myform" }))
Section、Partial View 和 Child Action 参考：http://www.cnblogs.com/willick/p/3410855.html
右击Index方法，添加视图，编辑该视图如下：
@model string[] @{ ViewBag.Title = "Index"; } @section Header { <div class="view"> @foreach (string str in new [] {"Home", "List", "Edit"}) { @Html.ActionLink(str, str, null, new { style = "margin: 5px" }) } </div> } <div class="view"> This is a list of fruit names: @foreach (string name in Model) { <span><b>@name</b></span> } </div> @section Footer { <div class="view"> This is the footer </div> }
编辑 /Views/Shared/_Layout.cshtml 文件如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width" />
<style type="text/css">
div.layout { background-color: lightgray;}
div.view { border: thin solid black; margin: 10px 0;}
</style>
<title>@ViewBag.Title</title>
</head>
<body>
@RenderSection("Header")
<div class="layout">
This is part of the layout
</div>
@RenderBody()
<div class="layout">
This is part of the layout
</div>
@RenderSection("Footer")
<div class="layout">
This is part of the layout
</div>
</body>
</html>
section只能在当前View或它的Layout中被调用。@RenderSection方法没有找到参数指定的section会抛异常，如果不确定section是否存在，则需要指定第二个参数的值为false，如下：
... @RenderSection("scripts", false) ...
我们还可以通过 IsSectionDefined 方法来判断一个section是否被定义或在当前View中是否能调用得到，如：
... @if (IsSectionDefined("Footer")) { @RenderSection("Footer") } else { <h4>This is the default footer</h4> } ...