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... instead james told me to use only one folder with set default to me is not good 2) at the beginning of the program I have to go to check that the archives and indexes exist in the folder because I have to do it because I do not trust the people who use computers and that fuss between folders, ...

a question I have a dbf on the root of application I use it for check : on this file I have the folder of archives and the year of operation sample year => 2007 DBFPATH = > 2007\data then there are info data of school . these data are used on reports and other procedures ...

... TDatabase has been working fine all along. Perhaps you were making programming errors. 2) Seeing your source I saw you create at init the index of archives when the app is opened then call oCustomers := TCustomers():new() but Tcustomer class is linked to another class called Txdata why this ? why ...

... forum but only the newsgroup. I used this expression   USE Customer   DATABASE oDbf  So I had to find another way to use the archives on the local network. Later I preferred not to deal with this type of connection in order not to run into these errors. For you first test ...

Dear friends, I wish to ask what is the best way to manage archives in a network for an application I need to create. Until now I have limited myself to open the archives in an exclusive way because I have left the problem of the network. I have made ...

Cristóbal,

Do you know how to use this function http://doc.qt.io/archives/qt-4.8/sql-connecting.html with Fivetouch ?

... Saludos Arturo Dear Arturo Nice work,I really like the clean style I think the css was used. are you using the dbf archives with Mr Carles tweb or convert them to (my) sql and then reconvert them when the same data loads them into your application?

should I use tdatabase or mysql or ads? I do not have to manage large archives for which it is necessary in my opinion mysql or ads, now I have the only need to use archives that I can open from another part because I explain you I created a function that sends ...

Silvio, You really need to use database objects. Then you can just do: oCustomer:= TCustomer():new()oCustomer:blank()         // blanks all the fieldsoCustomer:name:="Silvio"...wait some timeoCustomer:save()  You build in a check in the save() method to prev...

Something like (symplified):

Code: Select all  Expand view

FLOCK()

// Do your checking

// If checking is ok do your creation/saving

UNLOCK

So no user can execute the same operation at the same time.

EMG

What do you mean by block you can give me an example

Exactly as you said. You have to check for uniqueness and other conditions just before the record is created/saved. But this is not enough: you have to ensure that the whole operation (check + save) is not mixed with the same operation from another user. This is why lock is necessary. Probably (depe...

... before saving I have to check if there is already that code but then I have to check that there is already that name and this happens for all the archives. a total frazzle ... that's why I abandoned this system to work in the local network, at the programming level it wastes time to make these ...

... the functions when we try them all turn then when one puts them in the big applications are created the problems, I never trusted to manage the archives in a local network for the countless problems that there are... It's not so easy . I created a "Netuse" type function but a little ...

... remember how I must create it because in the last 10 years I have preferred to deal with simple little programs where there was no need for the archives on the net. now I present the problem of an application that must necessarily use a shared management of the archives because it connects in ...