【转】 .Net MVC4 上传大文件，并保存表单

1前台：cshtml

 1 </pre><pre name="code" class="csharp">@model BLL.BLL.Product  
 2   
 3 @{  
 4     ViewBag.Title = "Add";  
 5 }  
 6   
 7 <h2>Add</h2>  
 8   
 9 <form action="../Product/Add" method="post" enctype="multipart/form-data">  
10 <table>  
11 <tr>  
12 <td>@Html.Label("ProductName:")</td>  
13 <td>@Html.TextBoxFor(m=>m.ProductName)</td>  
14 </tr>  
15   
16 <tr>  
17 <td>@Html.Label("ProductDesc:")</td>  
18 <td>@Html.TextBoxFor(m=>m.ProductDesc)</td>  
19 </tr>  
20   
21 <tr>  
22 <td>@Html.Label("ProductPrice:")</td>  
23 <td>@Html.TextBoxFor(m=>m.ProductPrice)</td>  
24 </tr>  
25   
26 <tr>  
27 <td>@Html.Label("ProductImage:")</td>  
28 <td><input type="file" name="ProductImage"/></td>  
29 </tr>  
30   
31 <tr>  
32 <!--下拉列表框,数据由后台初始化-->  
33 <td>@Html.Label("ProductCategory:")</td>  
34 <td>@Html.DropDownListFor(m=>m.CId, @ViewBag.cList as IEnumerable<SelectListItem>)</td>  
35 </tr>  
36   
37 <tr>  
38 <td><input type="submit" value="submit" /></td></tr>  
39   
40 </table>  
41 </form>

2. 后台Controller

 1 public ActionResult Add() {  
 2     
 3     ShoppingDataContext dc = new ShoppingDataContext();  
 4   
 5     //初始化下拉列表框的数据  
 6     var linq = from c in dc.ProductCategories select new { c.CategoryId,c.CategoryName};  
 7     List<SelectListItem> cList = new List<SelectListItem>();  
 8     foreach(var category in linq){  
 9         SelectListItem item = new SelectListItem() { Text=category.CategoryName, Value=category.CategoryId};  
10         cList.Add(item);          
11     }  
12     ViewBag.cList = cList;  
13     return View();  
14 }  
15   
16   
17 [HttpPost]  
18 public ActionResult Add(Product p)  
19 {  
20     Stream uploadStream = null;  
21     FileStream fs = null;  
22     try  
23     {  
24         //文件上传，一次上传1M的数据，防止出现大文件无法上传  
25         HttpPostedFileBase postFileBase = Request.Files["ProductImage"];  
26          uploadStream = postFileBase.InputStream;  
27         int bufferLen = 1024;  
28         byte[] buffer = new byte[bufferLen];  
29         int contentLen = 0;  
30           
31         string fileName = Path.GetFileName(postFileBase.FileName);  
32         string baseUrl = Server.MapPath("/");  
33         string uploadPath = baseUrl + @"ImagesUploadProduct";  
34          fs = new FileStream(uploadPath + fileName, FileMode.Create, FileAccess.ReadWrite);  
35   
36         while ((contentLen = uploadStream.Read(buffer, 0, bufferLen)) != 0)  
37         {  
38             fs.Write(buffer, 0, bufferLen);  
39             fs.Flush();  
40         }  
41   
42   
43         //保存页面数据，上传的文件只保存路径  
44         string productImage = "/Images/Upload/Product/" + fileName;  
45         p.ProductImage = productImage;  
46         p.ProductId = Guid.NewGuid().ToString();  
47         p.CreationDate = DateTime.Now;  
48   
49         ShoppingDataContext dc = new ShoppingDataContext();  
50         dc.Products.InsertOnSubmit(p);  
51         dc.SubmitChanges();  
52     }  
53     catch (Exception ex)  
54     {  
55         ex.StackTrace.ToString();  
56     }  
57     finally {   
58     if(null !=fs){  
59         fs.Close();  
60     }  
61     if (null != uploadStream)  
62     {  
63         uploadStream.Close();  
64     }  
65     }  
66   
67     return RedirectToAction("../Category/ListProducts", new { cId=p.CId});  
68 }

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:

1 <httpRuntime maxRequestLength="999999999" />