StartTransaction giving Error " Already in Transaction " .

Posted on 2003-03-21
Medium Priority
Last Modified: 2010-04-04
I am doing  a 3 tier application on Delphi(MIDAS) with MSSql as backend. I would like to insert/update and edit the datas of master and detail tables with an active transaction ,so that i can commit or rollback, if there is any error.

I have written in the after post event the following code.

   { this is a TLB Method that checks if any transaction is active and if not Starts a new Transaction " if not DataBase.InTransaction then DataBase.StartTransaction;" }
    { this is a TLB Method that checks if any transaction is active and if Commits the active transaction " if DataBase.InTransaction then DataBase.Commit;"}
    { this is a TLB Method that checks if any transaction is active and if Rollbacks the active transaction " if DataBase.InTransaction then DataBase.Rollback;"}  
                    But it gives an error 'Already InTrasaction ' when the control goes to  the line

   What might be the problem ? Is it due to the back-end (MSSQL ) that has a default Transaction ??
Question by:vineeth_mathew
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Accepted Solution

nafeelm earned 300 total points
ID: 8269873

try setting the StatTransaction in Before Post event

in the AfterPost event let the following be:
   //ClientDataSet_Master.ApplyUpdates(-1); you cannot put this here

also set the RollBack event in AfterCancel event just incase the user cancels the record!

Expert Comment

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