Code for file upload control

protected void Button1_Click(object sender, EventArgs e)
{
if (FileUpload1.FileContent.Length > 0)
{
FileUpload1.SaveAs(Server.MapPath("dmg_Images") + "\\" + System.IO.Path.GetFileName(FileUpload1.FileName));

}
HiddenField1.Value = Server.MapPath("dmg_Images") + "\\" + System.IO.Path.GetFileName(FileUpload1.FileName);
Image2.ImageUrl = "~/NewFolder1/dmg_Images/" + System.IO.Path.GetFileName(FileUpload1.FileName);
}