How can i use transaction as per my requirement

Hmm i think no one understand my question clearly so in simple scenario i am saying

i am having a form which will have 2 text boxes and button when i click on button i would like to insert the text entered in the text boxes to database as separate rows.

Assume i will have a bool value to pass while inserting if i give true for the first item it will get inserted, i will give false to the second one which i would like to insert. As i am having false i don't want to insert this so i have to roll back the previous one too

a sample code

button click
{
string str="Dora";
string str1="Babu";
bool flag=true;
i=1,j=1;
if(i==1 && flag==true)
inser str;
flag=false;
if(j==1 && flag==false)
rollback 
}

ok...from my point of view create the scenario in such a way that handle two methods 

if(Find(maxlst))
{
obj.insert();  //insert it in temp table
obj.delete();  //delete that
}
else
{
obj.rollback();  //get the data back to original table from temp table
}

Try this,

if(FInd(maxlst))
{

SET TRANSACTION ISOLATION LEVEL SERIALIZABLE; START TRANSACTION;

obj.delete();  // Here i wrote the logic to delete

COMMIT;

}
else
{

// I would like rollback the previous which i deleted
ROLLBACK;

}