asp.net單個檔案上傳和多個檔案上傳

單個檔案

.aspx

<input type="file" id="UploadFile" name="UploadFile" runat="server" />

 .cs
 string sPath = Server.MapPath("~") + @"\upload\file\;
 string FileName = "filename.txt";
 UploadFile.PostedFile.SaveAs(sPath + FileName);

多個檔案

.aspx

 <input type="file" id="UploadFile" name="UploadFile" runat="server" />
 <input type="file" id="File1" name="UploadFile" runat="server" />

 .cs

 HttpFileCollection files = Request.Files;
 string sPath = Server.MapPath("~") + @"\upload\file\;
 string FileName = string.Empty;

 for (int i = 0; i < files.Count; i++)
  {
      HttpPostedFile file = files[i];
      string Sheet = "file" + System.DateTime.Now.ToString().Replace("-", "").Replace(":", "").Replace(" ", "") + "-" + i.ToString();
      FileName = Sheet + ".xls";

      file.SaveAs(sPath + FileName);

   }