‫Upload چند فایل بطور هم زمان در ASP.NET 4.5

<input type="file" multiple="multiple" name="FileUpload1" id="FileUpload1" />

<asp:FileUpload ID="FileUpload1" runat="server" AllowMultiple="true" />

protected void Upload_Click(object sender, EventArgs e)
{
  if (FileUpload1.HasFiles)
  {
    string rootPath = Server.MapPath("~/App_Data/");
    foreach (HttpPostedFile file in FileUpload1.PostedFiles)
    {
      file.SaveAs(Path.Combine(rootPath, file.FileName));
      Label1.Text += String.Format("{0}<br />", file.FileName);
    }
  }
}