check database table row available or match the codition for windows app.

string strAnswer = GetAnswerFromDB();//fetch your value from DB
//do google if you want to know Ho to fetch value from DB using c#

//Check your conditions as below

switch (strAnswer.toUpper())
{
   case "MRP":
      DoActionRelatedtoMRP();
      break;
   case "RATE":
      DoActionRelatedtoRATE();
      break;
   case "SALE RATE":
      DoActionRelatedtoSALERate();
      break;
    default:
       DoCommonAction();
       break;
}

private void DoActionRelatedtoMRP()
{
//do something when condition is MRP
}

private void DoActionRelatedtoRATE()
{
//do something when condition is RATE
}

private void DoActionRelatedtoSALERate()
{
//do something when condition is SALE RATE
}

private void DoCommonAction()
{
//do something when no expected condition matches
}