ASP------<input type="file"/>上传文件

界面代码(注意:runat=“Server”和input file中name一定要有)

<html xmlns="http://www.w3.org/1999/xhtml">  
<head>  
    <title></title>  
</head>  
<body>  
    <form action="../PMail/ListMail" runat="server"  method="post" enctype="multipart/form-data">  
    <div>  
        <input type="file" name="file" multiple/>  
        <input type="submit" value="提交" />  
    </div>  
    </form>  
</body>  
</html>

服务器代码

public ActionResult ListMail()
{
　　System.Web.HttpFileCollectionBase files = Request.Files;
    for (var i = 0; i < files.Count; i++)
    {
    　　HttpPostedFileBase postFile = files[i];
        string fileName = System.IO.Path.GetFileName(postFile.FileName);
        if (!string.IsNullOrEmpty(fileName))
        {
        　　string fileExtension = System.IO.Path.GetExtension(fileName);
            string directory = Server.MapPath("/MyFile/");
            string path = directory + fileName;
            if (!Directory.Exists(directory))
            {
            　　Directory.CreateDirectory(directory);
            }
            if (System.IO.File.Exists(path))
            {
            　　System.IO.File.Delete(path);
            }
                postFile.SaveAs(path);
            }
         }
    }
}