.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 = ;
        byte[] buffer = new byte[bufferLen];
        int contentLen = ;  

        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, , bufferLen)) != )
        {
            fs.Write(buffer, , 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="" />  

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