if (ds2.Tables[0].Rows.Count > 0)
{
int total = 0;
for (int i = 0; i < ds2.Tables[0].Rows.Count; i++)
{
if (ds2.Tables[0].Rows[i]["plan_package"].ToString() != "")
{
total += Convert.ToInt16(ds2.Tables[0].Rows[i]["plan_package"].ToString());
}
}
this.Label5.Text = "共计: " + total.ToString() + " ";
}