Question

我在尝试在C＃应用中打开表单时遇到此错误，但我不知道可能出现的问题。错误出现在这行代码DataTable dt = new DataTable(); dt.Load(cmd.ExecuteReader());

中

错误：

{＆＃34;＆＃39;附近的语法不正确，＆＃39;。＆＃34;}

 public void popTraseu()
    {
        string cs = "Data Source=CODRINMA\\CODRINMA;Initial Catalog=TrafficManager;Integrated Security=True";
        string select = "ats.NrOrdine, a.IDAutogara, a.Denumire as Autogara, o.Oras as Oras, o.Judet FROM Curse c INNER JOIN Trasee t on c.IDTraseu=t.IDTraseu INNER JOIN AutogariTrasee ats on t.IDTraseu=ats.IDTraseu INNER JOIN Autogari a on ats.IDAutogara=a.IDAutogara INNER JOIN Orase o on a.IDOras=o.IDOras where IDCursa=@IDCursa ORDER BY ats.NrOrdine";

        try
        {
            using (SqlConnection con = new SqlConnection (cs))
            {
                con.Open();
                SqlCommand cmd = new SqlCommand(select, con);
                cmd.Parameters.Clear();
                cmd.Parameters.AddWithValue("IDCursa", int.Parse(grdCurse.CurrentRow.Cells[0].FormattedValue.ToString()));
                DataTable dt = new DataTable();
                dt.Load(cmd.ExecuteReader());
                con.Close();
                grdDetalii.DataSource = dt;
            }
        }
       catch (Exception er) { MessageBox.Show(er.Message); }

Answer 1

您似乎忘了将select放在查询的开头。

string select = "select ats.NrOrdine, a.IDAutogara, a.Denumire as Autogara, o.Oras as Oras, o.Judet FROM Curse c INNER JOIN Trasee t on c.IDTraseu=t.IDTraseu INNER JOIN AutogariTrasee ats on t.IDTraseu=ats.IDTraseu INNER JOIN Autogari a on ats.IDAutogara=a.IDAutogara INNER JOIN Orase o on a.IDOras=o.IDOras where IDCursa=@IDCursa ORDER BY ats.NrOrdine";

Answer 2

您的选择不是以SELECT开头的。因此，SQL语句的语法无效。

还要注意这一行：

cmd.Parameters.Clear();

完全是多余的。新实例中没有参数。

{＆＃34;＆＃39;附近的语法不正确，＆＃39;。＆＃34;}

2 个答案: