Question

I am trying to get the database values and binding to data table by using the following query

sql = @"SELECT member_Id, 30*memberToMship_ChargePerPeriod  / DateDiff(memberToMship_EndDate, 
         memberToMship_StartDate) As monthlyamount,
         PERIOD_DIFF(DATE_FORMAT(now(),'%Y%m'), 
         DATE_FORMAT(memberToMship_StartDate,'%Y%m'))  + (DAY(memberToMship_StartDate) < memberToMship_DueDay)+ (DAY(now()) > memberToMship_DueDay)-1  AS ExpPayments, 
         SUM(memberToMship_InductionFee+memberToMship_JoinFee+
             (IF(mshipOption_Period='year',
             TIMESTAMPDIFF (YEAR ,memberToMship_StartDate, memberToMship_EndDate),
             TIMESTAMPDIFF (MONTH ,memberToMship_StartDate, memberToMship_EndDate)) * memberToMship_ChargePerPeriod)) as value 
        FROM membertomships 
        INNER JOIN mshipoptions on membertomships.mshipOption_Id = mshipoptions.mshipoption_Id";

and this is my code for getting the data to datable from database

string memberid;
double value = 0.0;
double expectedpayment=0.0;
double monthlypayamount=0.0;
int dueday = 0;

dt = xxxxxx.GetData(sql, mf);    
if (dt != null && dt.Rows.Count > 0)
{
      memberid = Convert.ToInt32(dt.Rows[0]["member_Id"]).ToString();
      monthlypayamount = Convert.ToDouble(dt.Rows[1]["monthlyamount"]);
      expectedpayment = Convert.ToDouble(dt.Rows[2]["ExpPayments"]);
      value = Convert.ToDouble(dt.Rows[3]["value"]);       
}

but I am getting an error

” index out of range exception”

and error like this

“there is no row at position 1”

Would any one please help on this…

Answer 1

You should use index [0] for Rows on every line of code if you want to get all the data from the first row that was returned. If you use Rows[1] and Rows[2] etc., then you are looking at the second row, and third row, etc., which is invalid if your query only returned one row of data.