mvc多个文件上传和单个文件上传

public ActionResult FileUP(HttpPostedFileBase file)
{
var files = Request.Files;
if (files != null && files.Count > 0)
{
#region  执行多个文件上传
for (int i = 0; i < files.Count; i++)
{
HttpPostedFileBase fileitem = files[i];
//判定文件的大小
string strExtension = Path.GetExtension(fileitem.FileName);
double dFileSize = fileitem.ContentLength;
if (dFileSize > 5242880)//1024*1024*5)
{
return Content("<script>alert('" + fileitem.FileName + "文件大于5MB')</script>");
}
else
{
//创建文件
string filePath = "~/images/Student/";
Directory.CreateDirectory(Server.MapPath(filePath));
//创建唯一的文件名
string fileName = Guid.NewGuid().ToString();
string fFullDir = filePath + fileName + strExtension;
fileitem.SaveAs(Server.MapPath(fFullDir));
}
}
#endregion
}
else
{
#region 执行单个文件上传
if (file != null)
{
//可以判断它的大小格式
//创建文件夹
string filePath = "~/images/Student/";
Directory.CreateDirectory(Server.MapPath(filePath));
//string fileName = DateTime.Now.ToString("yyyyMMddHHmmssfff");
string fileName = Guid.NewGuid().ToString();
file.SaveAs(Server.MapPath(filePath + fileName + ".png"));
return Content("<script>alert('上传成功！');location.href="
+ Url.Content(filePath) + "</script>");
}
#endregion
}
return View();
}