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Alain Bastien
CBuilder Developer |
Alain Bastien
CBuilder Developer |
OLDVALUE, NEWVALUE2004-10-23 09:56:07 PM cppbuilder73 Hi all, How can I keep track of any modifications done in a anytable into another sentinel table of 5 fields DATETIME, USER, TABLEMODIFIED, OLDVALUE, NEWVALUE Thanks I am using C++ Builder 4 and Interbase 6 |
Nick Rambarransingh
CBuilder Developer |
2004-10-23 11:41:17 PM
Re:OLDVALUE, NEWVALUE
Good Day,
The first thing is, are you using something like MIDAS? If you are, then on the appserver, you can intercept the updates from the DataSetProvider, in the BeforeAppLyUpdates event. From here, you will have access to the dataset that has all the records being updated. However, this method deals with ALL the update type, Insert/Delete/Update. You may want to consider working with the TQuery, as this will deal with each record at a time. This gice you more individualized control of each record. Well - thats completely up to you. If on the other hand, you are NOT using something like MIDAS, then, you may want to try and structure your application in such a way that all Insert/Delete/Update go through some very specific function calls. In the case of an update, you can now capture what is being changed, and take the necessary action. I might also suggest that if your application is NOT a Multi-Tier app, consider make use of TClientDataSets. This may be confusing, but the benefits are great. There is a very nice article on how to employ this in a 2 tier app in the BDN under C++. Of course, you must understand that I gather from this email that you are building a two tier app. If not, sorry for the 2tier babble... HTH, Nick "Alain Bastien" < XXXX@XXXXX.COM >wrote: Quote
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Alain Bastien
CBuilder Developer |
2004-10-24 02:45:30 AM
Re:OLDVALUE, NEWVALUE
Hi,
I am using C++ Builder 4 Enterprise and there are the MIDAS components. I Query for one record load them in TEdit and TImage Tmemo etc ... Proceed to modification in the TEDIT etc and instead of the INSERT Tquery its an UPDATE TQuery But if only one field or Two has been modify e.g if a Picture has been swaped in the TImage or Tmemo erased and replaced Thanks giving me more details Alain Nick Rambarransingh < XXXX@XXXXX.COM >wrote in message Quote
access to the dataset that has all the records being updated. However, this method deals with ALL the update type, Insert/Delete/Update. You may want to consider working with the TQuery, as this will deal with each record at a time. This gice you more individualized control of each record. Well - thats completely up to you. Quote
case of an update, you can now capture what is being changed, and take the necessary action. Quote
2 tier app in the BDN under C++. Quote
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Nick Rambarransingh
CBuilder Developer |
2004-10-24 05:31:18 AM
Re:OLDVALUE, NEWVALUE
Salut,
Ok, so you are using MIDAS. Then you want to concentrate your efforts in two places. The first would be at the DSP, where you can intercept records before they are applied to the database. To do that, look in the help for BeforeApplyUpdates. On the other hand, look at the events associated with the TQuery. On a slightly different note, you want to try and move to CBuilder 5 Ent or higher, at your earliest oppourtunity. hth, Nick "Alain Bastien" < XXXX@XXXXX.COM >wrote: QuoteHi, |
Alain Bastien
CBuilder Developer |
2004-10-24 05:27:16 PM
Re:OLDVALUE, NEWVALUE
Hi,
About upgrading !!! I think that C++ Builder 4 Ent have it all because I moved from Delphi 2 to C++ Buiilder 3 then 4 Ent required a lot of recoding and readaptation and even certain function incompatibility found between Builder 3 and 4 So, 5 or Higher where does it stop !! even Windoz, tried several versions but came back to 98SE and even Linux tried several version but came back to the 9.0 Mandrake I think that this version is limited to the imagination of the user and may require a few additional coding to get the work done properly. The solution is out there or in there and the objective is not to be uptodate but get the work done I think I'm out of subject here Correct me if I am wrong. Thanks again Alain Nick Rambarransingh < XXXX@XXXXX.COM >wrote in message Quote
help for BeforeApplyUpdates. On the other hand, look at the events associated with the TQuery. Quote
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