.Net MVC4 上传大文件，并保存表单

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1. 前台 cshtml

</pre><pre name="code" class="csharp">@model BLL.BLL.Product@{ViewBag.Title = "Add";
}<h2>Add</h2><form action="../Product/Add" method="post" enctype="multipart/form-data">
<table>
<tr>
<td>@Html.Label("ProductName:")</td>
<td>@Html.TextBoxFor(m=>m.ProductName)</td>
</tr><tr>
<td>@Html.Label("ProductDesc:")</td>
<td>@Html.TextBoxFor(m=>m.ProductDesc)</td>
</tr><tr>
<td>@Html.Label("ProductPrice:")</td>
<td>@Html.TextBoxFor(m=>m.ProductPrice)</td>
</tr><tr>
<td>@Html.Label("ProductImage:")</td>
<td><input type="file" name="ProductImage"/></td>
</tr><tr>
<!--下拉列表框,数据由后台初始化-->
<td>@Html.Label("ProductCategory:")</td>
<td>@Html.DropDownListFor(m=>m.CId, @ViewBag.cList as IEnumerable<SelectListItem>)</td>
</tr><tr>
<td><input type="submit" value="submit" /></td></tr></table>
</form>

2. 后台Controller

        public ActionResult Add() {ShoppingDataContext dc = new ShoppingDataContext();//初始化下拉列表框的数据var linq = from c in dc.ProductCategories select new { c.CategoryId,c.CategoryName};List<SelectListItem> cList = new List<SelectListItem>();foreach(var category in linq){SelectListItem item = new SelectListItem() { Text=category.CategoryName, Value=category.CategoryId};cList.Add(item);        }ViewBag.cList = cList;return View();}[HttpPost]public ActionResult Add(Product p){Stream uploadStream = null;FileStream fs = null;try{//文件上传，一次上传1M的数据，防止出现大文件无法上传HttpPostedFileBase postFileBase = Request.Files["ProductImage"];uploadStream = postFileBase.InputStream;int bufferLen = 1024;byte[] buffer = new byte[bufferLen];int contentLen = 0;string fileName = Path.GetFileName(postFileBase.FileName);string baseUrl = Server.MapPath("/");string uploadPath = baseUrl + @"Images\Upload\Product\";fs = new FileStream(uploadPath + fileName, FileMode.Create, FileAccess.ReadWrite);while ((contentLen = uploadStream.Read(buffer, 0, bufferLen)) != 0){fs.Write(buffer, 0, bufferLen);fs.Flush();}//保存页面数据，上传的文件只保存路径string productImage = "/Images/Upload/Product/" + fileName;p.ProductImage = productImage;p.ProductId = Guid.NewGuid().ToString();p.CreationDate = DateTime.Now;ShoppingDataContext dc = new ShoppingDataContext();dc.Products.InsertOnSubmit(p);dc.SubmitChanges();}catch (Exception ex){ex.StackTrace.ToString();}finally { if(null !=fs){fs.Close();}if (null != uploadStream){uploadStream.Close();}}return RedirectToAction("../Category/ListProducts", new { cId=p.CId});}

3. 修改web.config 中对文件上传大小的限制

在 <system.web></system.web> 直接增加如下:

    <httpRuntime maxRequestLength="999999999" />

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