private void Button1_Click(object sender,EventArgs e)
  {
        Dataset ds=goods.GetInfoDataSet();
        if(ds.Table[0].Rows.Count>0)   //判断数据集是否为空
        {
                this.textbox1.text=ds.Table[0].Rows[0][0].ToString();
                this.textBox2.Text=ds.Table[0].Rows[0][1].ToString();
        }
    }