.Net MVC4 上传大文件，并保存表单

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" />