【译】MVC3 20个秘方-（11）通过表单上传文件
问题
你希望允许用户在你的网站上传并保存文件。
解决方案
通过HttpPostedFileBase.实现上传文件和保存到磁盘。
讨论
在接下来的例子里，之前创建的去添加和更新图书的View将被更新成允许用户选择一个文件并且上传缩略图文件。作为开始，Book/Create view 应该被更新，改变From的编码类型并且为缩略图字段替换掉脚手架textbox。代码如下：
@model MvcApplication.Models.Book
@{
ViewBag.Title = "Create";
}
<h2>
Create</h2>
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")"
type="text/javascript"></script>
<script src="
@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")"
type="text/javascript"></script>
@using (Html.BeginForm("Create", "Books", FormMethod.Post,
new { enctype = "multipart/form-data" }))
{
@Html.ValidationSummary(true)
<fieldset>
<legend>Book</legend>
<div class="editor-label">
@Html.LabelFor(model => model.Title)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Title)
@Html.ValidationMessageFor(model => model.Title)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Isbn)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Isbn)
@Html.ValidationMessageFor(model => model.Isbn)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Summary)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Summary)
@Html.ValidationMessageFor(model => model.Summary)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Author)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Author)
@Html.ValidationMessageFor(model => model.Author)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Thumbnail)
</div>
<div class="editor-field">
<input type="file" name="file" />
@Html.ValidationMessageFor(model => model.Thumbnail)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Price)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Price)
@Html.ValidationMessageFor(model => model.Price)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Published)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Published)
@Html.ValidationMessageFor(model => model.Published)
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>
Book/Edit view 也应该以相同的方式被更新，除了添加一个hidden字段（在旧的thumbnail那）。这将用于在BookController中上传新文件之前删除旧的文件。代码如下：
@model MvcApplication.Models.Book
@{
ViewBag.Title = "Edit";
}
<h2>
Edit</h2>
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")"
type="text/javascript"></script>
<script src="
@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")"
type="text/javascript"></script>
@using (Html.BeginForm("Edit", "Books", FormMethod.Post,
new { enctype = "multipart/form-data" }))
{
@Html.ValidationSummary(true)
<fieldset>
<legend>Book</legend>
@Html.HiddenFor(model => model.ID)
<div class="editor-label">
@Html.LabelFor(model => model.Title)
</div>
&nb
补充：Web开发 , ASP.Net ,
