c# - 如何在 C# 中更新数据网格，同时更新给定的新条目将同时插入？

Question

更新我使用的过程，但使用下面的代码我只能更新现有的

pt.PackageTariff_Update(var, dataGridView1.Rows[i].Cells[1].Value.ToString(),   
dataGridView1.Rows[i].Cells[2].Value.ToString(), 
dataGridView1.Rows[i].Cells[3].Value.ToString(), 
int.Parse(dataGridView1.Rows[i].Cells[0].Value.ToString()));

Answer 1

我得到了答案..我不知道这是否是正确的方法..给出了代码...

enter code here
         pt = new packagetariff();
         int var = int.Parse(combo_packTariffID.Text);
           for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
          {
            try
            {
                pt = new packagetariff();
                int Id = int.Parse(combo_packTariffID.Text.ToString());
                DataTable dt = pt.PackageTariff_View(Id);
                foreach (DataRow dr in dt.Rows)
                {
                    a = int.Parse(dr[0].ToString());
                }
            }
            catch { }

            if (a == dataGridView1.Rows.Count - 1)
                {

                 pt.PackageTariff_Update(var, dataGridView1.Rows[i].Cells[1].Value.ToString(), dataGridView1.Rows[i].Cells[2].Value.ToString(), dataGridView1.Rows[i].Cells[3].Value.ToString(), int.Parse(dataGridView1.Rows[i].Cells[0].Value.ToString()));

               }
        }

                if (a != dataGridView1.Rows.Count - 1)
                {
                    int Id = int.Parse(combo_packTariffID.Text.ToString());
                    pt = new packagetariff();
                    pt.delete_For_Update_tariff(Id);
                    for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
                    {
                    //pt.PackageTariff_Update(var, dataGridView1.Rows[i].Cells[1].Value.ToString(), dataGridView1.Rows[i].Cells[2].Value.ToString(), dataGridView1.Rows[i].Cells[3].Value.ToString(), int.Parse(dataGridView1.Rows[i].Cells[0].Value.ToString()));
                    pt.PackageTariff_Add(combo_packTariffID.Text,dataGridView1.Rows[i].Cells[1].Value.ToString(),dataGridView1.Rows[i].Cells[2].Value.ToString(),dataGridView1.Rows[i].Cells[3].Value.ToString(),dataGridView1.Rows[i].Cells[0].Value.ToString());
                    }
                }