dataset 和DataTable的用法

以下包含了这两种不同属性的用法：

foreach (DataRow dr in dataset.Tables[0].Rows)
            {

if (i != 0 && lujing!="")
                {
                    DataTable dt = new DataTable();
                    dt = new BLL.production().GetList_pro(" production_id=" + dr["Column1"]).Tables[0];
                    int n = int.Parse(dt.Rows.Count.ToString());
                    if (n == 0)
                    {
                        model.channel_id = 20;
                        model.category_id = 83;
                        model.production_id = int.Parse(dr["Column1"].ToString());
                        model.pmzc = dr["Column2"].ToString();
                        model.title1 = dr["Column3"].ToString();
                        model.author = dr["Column4"].ToString();
                        model.img_url1 = lujing + dr["Column5"].ToString();
                        model.size = dr["Column6"].ToString();
                        model.creation_year = dr["Column7"].ToString();
                        model.judge = dr["Column8"].ToString();
                        if (!string.IsNullOrEmpty(dr["Column10"].ToString()))
                        {
                            model.explain_1 = dr["Column10"].ToString();
                        }
                        model.explain_2 = dr["Column11"].ToString();
                        model.sort_id = 99;
                        if (bll.Add(model) < 1)
                        {

}
                    }
                    else {
                        foreach (DataRow item in dt.Rows)
                        {

Model.production model_1 = bll.GetModel(int.Parse(item["id"].ToString()));
                            model_1.price_1 = dr["Column9"].ToString();
                            if (bll.Update(model_1))
                            {

}
                        }
                       
                       
                    }
                   
                }
                i++;
            }