Core 项目下使用SQl语句

      public static DataTable ExeQuery(string connectionString, CommandType cmdType, string cmdText)
        {
            using (var conn = new SqlConnection(connectionString))
            {
                var mydt = new DataTable();
                conn.Open();
                var cmd = conn.CreateCommand();
                cmd.CommandType = cmdType;
                cmd.CommandText = cmdText;
                var adp = new SqlDataAdapter(cmd);
                adp.Fill(mydt);
                return mydt;
            }            
        }

        public static async Task<DataTable> ExeQueryAsync(string connectionString, CommandType cmdType, string cmdText)
        {
            using (var conn = new SqlConnection(connectionString))
            {
                var mydt = new DataTable();
                await conn.OpenAsync();
                var cmd = conn.CreateCommand();
                cmd.CommandType = cmdType;
                cmd.CommandText = cmdText;
                var adp = new SqlDataAdapter(cmd);
                adp.Fill(mydt);
                return mydt;
            }
        }

 private string GetId(string LOCATION, string OPERATING_UNIT)
        {
            using (var db = new OMSData.ACC_MINIEHUBContext())
            {
                string cmd = string.Format("select ww from wTES where LOCATION = '{0}' and OIT = '{1}'", LOCATION, OPERATING_UNIT);
                var mytb = fn.fnSQL.ExeQuery(db.ACC_Context.ConnectionString, CommandType.Text, cmd);
                var CUST_ACCOUNT_ID = mytb.Rows[0]["CUST_ID"].ToString();
                return CUST_ACCOUNT_ID;
            }
        }

  cmd = string.Format("select DeptName from [V_ACC_USER] where EMPID = '{0}'", WorkId);
                mytb = Asus.fn.fnSQL.ExeQuery(db.Context.ConnectionString, CommandType.Text, cmd);
                string DeptName = "Err";
                if (mytb.Rows.Count > 0)
                {
                    DeptName = mytb.Rows[0]["Name"].ToString();
                    DeptName = DeptName.Substring(DeptName.LastIndexOf('-') + 1);
                }