在asp.net mvc中上传大文件

在asp.net mvc 页面里上传大文件到服务器端，需要如下步骤：

1. 在Control类里添加get 和 post 方法

         // get method
         public ActionResult Upload()
         {
             return View();
         }
 
         // This action handles the form POST and the upload
         [HttpPost]
         public ActionResult Upload(HttpPostedFileBase file)
         {
             // Verify that the user selected a file
             if (file != null && file.ContentLength > )
             {
                 // extract only the fielname
                 var fileName = Path.GetFileName(file.FileName);
                 // store the file inside ~/App_Data/uploads folder
                 var path = Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName);
                 file.SaveAs(path);
             }
             // redirect back to the index action to show the form once again
             return RedirectToAction("Upload");
         }

2. 创建view页面，并且添加如下代码：

@using (Html.BeginForm("Upload", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    <input type="file" name="file" />
    <input type="submit" value="OK" />
}

3. 在Web.config里做如下添加和修改：

在<system.web>里添加

<httpRuntime targetFramework="4.5" maxRequestLength="1048576" executionTimeout="3600"/>

并且在<system.webServer>里添加

    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="1073741824" />
      </requestFiltering>
    </security>

大功告成！

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