database connection using testcomplete

try
      {
            //var excelName = "C:\\TestData.xls"
            var excelFileName = "Test"
            var excelConnection = new Sys.OleObject("ADODB.Connection");
      
            var str_Connection = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source = " + excelFileName + ";Persist Security Info=False;Extended Properties=Excel 8.0;"
      
            excelConnection.Open(str_Connection);
      
            var excel_recordSet = new Sys.OleObject("ADODB.Recordset");
      
            var excelQuery = select * from login;(example)
      
            excel_recordSet.Open(excelQuery, excelConnection);
      
            if(!excel_recordSet.bof)
            {
                  try
                  {
                        resultValue = aqConvert.VarToStr(excel_recordSet.fields.Item(ColumnName));
                  }
                  catch(e)
                  {     
                        resultValue =  undefined;
                  }
                  
            }
            excel_recordSet.Close();
            excelConnection.Close();