protected void btnUploadImage_Click(object sender, EventArgs e)
    {
        //server side checking
        if (FileUpload1.PostedFile.ContentType.ToLower().StartsWith("image") && 
        FileUpload1.HasFile)
        {
            Hashtable imageHash = new Hashtable();
            imageHash.Add("@imagedata", FileUpload1.FileBytes);
            DataBaseHelper DBHelper = new DataBaseHelper();
            //storing image in to DataBase
            DBHelper.ExecuteNonQuery("sp_UploadImage", imageHash);
        }
    }