.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 + @"ImagesUploadProduct";  
         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="999999" />  

 原文链接