procedure tform1.adodataset1beforepost(dataset:tdataset);
begin
adoconnection1.begintrans;
end;
procedure tform1.adodataset1afterpost(dataset:tdataset);
begin
adoconnection1.committrans;
end;
procedure tform1.adodataset1posterror(dataset:tdataset);
begin
adoconnection1.rollbacktrans;
end;
begin
adoconnection1.begintrans;
end;
procedure tform1.adodataset1afterpost(dataset:tdataset);
begin
adoconnection1.committrans;
end;
procedure tform1.adodataset1posterror(dataset:tdataset);
begin
adoconnection1.rollbacktrans;
end;
有事务处理,关键是一致性
在线
begin
adoconnection1.begintrans;
try
adoquery.close;
adoquery.sql.clear;
adoquery.sql.add(insert 语句);
adoquery.execsql;
如果还有insert 语句则:
adoquery.close;
adoquery.sql.clear;
adoquery.sql.add(insert 语句);
adoquery.execsql;直到所有insert 语句完成.
adoconnection1.committrans;
except
adoconnection1.rollbacktrans;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
adoconnection1.begintrans;
try
adoconnection1.execute(insert 语句);
如果还有insert 语句则:
adoconnection1.execute(insert 语句);直到所有insert 语句完成.
adoconnection1.committrans;
except
adoconnection1.rollbacktrans;
end;
end;
eoAsyncFetch
eoAsyncFetchNonBlocking
eoExecuteNoRecords
着几个参数怎么使用