變量訪問Oracle數據研究ing

方法，調用

public DataTable SayHi(string sql, DateTime begintime, DateTime endtime, string[,] array,string btime,string dtime)
            {
                string constr = @"Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.93.64.242)(PORT=1521))(CONNECT_DATA=(SERVER=dedicated)(SERVICE_NAME=wmstest)));User ID=asrs;Password=asrs123";
                OracleConnection con = new OracleConnection(constr);

                //數組處理--去除空數據
                int count = 0;
                for (int i = 0; i < array.GetLength(0); i++)
                {
                    if (array[i, 1] != null)
                    {
                        count++;
                    }
                }
                ArrayList al = new ArrayList();
                ArrayList ar = new ArrayList();
                for (int i = 0; i < count; i++)
                {
                    if (array[i, 1] != string.Empty)
                    {
                        al.Add(array[i, 0]);
                        ar.Add(array[i, 1]);
                    }
                }
                string[,] alr = new string[al.Count, 2];
                for (int m = 0; m < alr.GetLength(0); m++)
                {
                    alr[m, 0] = (string)al[m];
                    alr[m, 1] = (string)ar[m];
                }
                try
                {  //變量賦值
                    con.Open();
                    OracleParameter[] myParamArray = new OracleParameter[alr.Length + 2];
                    OracleCommand command = new OracleCommand(sql, con);
                    OracleDataAdapter da = new OracleDataAdapter();
                    string ccBTime = @":" + btime;
                    string ccDTime = @":" + dtime;
                    myParamArray[0] = new OracleParameter("ccBTime", OracleType.DateTime);
                    myParamArray[0].Value = endtime;
                    command.Parameters.Add(myParamArray[0]);
                    myParamArray[1] = new OracleParameter("ccDTime", OracleType.DateTime);
                    myParamArray[1].Value = begintime;
                    command.Parameters.Add(myParamArray[1]);
                    for (int j = 2; j < alr.GetLength(0); j++)
                    {
                        string ccStr = @":" + alr[j, 0];
                        myParamArray[j] = new OracleParameter(ccStr, OracleType.VarChar, 50);
                        myParamArray[j].Value = alr[j, 1];
                        command.Parameters.Add(myParamArray[j]);
                    }
                    da.SelectCommand = command;
                    DataTable dt = new DataTable();
                    da.Fill(dt);
                    return dt;
                }
                catch (Exception e)
                {
                    MessageBox.Show("異常" + e.Message);
                    return null;
                }
                finally
                {
                    con.Close();
                }
            }

int arr = 0;
            string[,] array = new string[10, 2];
            string btime = "SCREATDATE"; //定義時間變量值
            string dtime = "SDATE";
            string sql = string.Format(@"select * from Student where 1=1  and SDATE<=to_date(:SDATE,‘YYYY/MM/DD hh24:mi:ss‘) and SCREATDATE>to_date(:SCREATDATE,‘YYYY/MM/DD hh24:mi:ss‘)");
            string sno = textBox1.Text.Trim();
            string sname = textBox2.Text.Trim();
            string sage = textBox3.Text.Trim();
            DateTime beginTime = dateTimePicker1.Value;
            DateTime endTime = dateTimePicker2.Value;

            if (sno != "")
            {
                sql += string.Format(" and SNO =:SNO");
                array[arr, 0] = "SNO";
                array[arr, 1] = sno;
                arr++;
            }
            if (sname != "")
            {
                sql += string.Format(" and SNAME=:SNAME");
                array[arr, 0] = "SNAME";
                array[arr, 1] = sname;
                arr++;
            }
            if (sage != "")
            {
                sql += string.Format(" and SAGE=:SAGE");
                array[arr, 0] = "SAGE";
                array[arr, 1] = sage;
                arr++;
            }
            MyMothed mm = new MyMothed();
            dataGridView1.DataSource = mm.SayHi(sql, beginTime, endTime, array, btime, dtime);