FiveTech Support Forums

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 applications up until now that were needed for me or my friends for personal use.

Now I need to create something but with the archives in a network so that all the operators can interact with the same archives and at the same time

for example: make an invoice at the same time another user does it

But there are problems because asking friends in the forum and other people who work with fwh.

Some are oriented to use the class tdatabase others instead open archives in a shared way, another friend sent me a very special modified tdatabase class.

I really can not figure out which way I can use so even because I would like to fix already from now those props
that I will need for a tomorrow for my next applications so as to use the archives for apps that require the network and for apps that do not they necessarily need to use them in a network

In ancient times I used the class of Manuel Esposito (gather / scatter) but I have so many problems for a simple shirting program
and after this bad experience I preferred not to deal with the topic of the network

I would especially like someone to show me which performance method to use according to his personal working experiences,

which class to use if there is a need for a class and to have small examples to try, to open, modify, delete, search, print and save a record

I thank you in advance

1) Tdatabase of fwh run ok or have problems ? or I must use another tdatabase on commerce..

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 not make a link directly to tdatabase class ?

Class TCustomers from TXData
   Method New()
Endclass

Method New(lShared) CLASS TCustomers
   Default lShared := .t.
   ::super:New("customer", lShared)
   ::use()
Return self

   Default lShared := .t.
  ::use()

I understood you change the name " FArley" into "Farley 2" because then you call oCustomer:save().

But then when I see the message I see "Farley 2" but then on the browse I see allways "Farley" and not "Farley 2"

   oCustomers:last := "Farley"
   oCustomers:save()

What is the difference between calling txdata or calling tdatabase directly?

Good
I must make a mother class txdata and then I can make the other classes for customer, articles, ecc.
in these days I have to try to do something with the teachings you gave me
perhap At first, I can converte a my easy prg with these methods

Silvio,

I first started programming for networks in the old MS-DOS days, using Clipper. That was over 30 years ago. My clients ( small businesses ) may use anywhere from 2 to 20 computers in each location, and they must all be able to work on the same files, inputting data, all day long. My application has been meeting their needs, quickly and easily, for that whole time.

Many years ago, when moving to FWH, I also adopted tData ( the tdatabase extension ) that James provided. It has never failed me, and made my programming cleaner and easier.

Several years back, I followed James advise on OOPS and moved most of my program into Classes and Methods. I condensed everything to eliminate duplications of processes. It was an excellent move for me, making the code much easier to support, by updates, extensions, and of course debugging.

It is a lot of work. I agree to that. But once it is done, everything else falls into place and thereafter it becomes much easier.

I also use resource files which I know you do not like. However, these allow me to easily create, and enhance, very complex data screens that provide for what my clients want. I recently have attempted to change to a @ x,y format, and so far I find it very difficult to get what I want. I've looked at samples, what little we have for reference material, and asked questions, but so far nothing comes close to giving me the look and feel of my .rc controls, and dialogs. Change is challenging, but in the end, perhaps we do far better for our customers when we take that step. My clients pay me to meet their needs, and so they will always be my top priority.

Finally, for networking, my application will support any number of computers through Microsoft's native networking, but the performance can become very slow and less reliable. So I have put in the capability for them to use the Advantage Database Server, client/server, software. They are then safe and get incredibly fast performance across the network. Some people have experimented with some other Client/Server options but so far no one has posted about success with other systems ( for .dbf ).

Tim

I must open and manage this file at the same mode ( txdata) or I must open it on esclusive mode ?

Tim,

Thanks for your input and the kind words.

James

Probably you are using the new CDX with the old DBF. Try to rebuild the CDX.

EMG

Silvio,

All of my formal training is in. psychology and education. I was asked to write programs in dBase II starting in 1982. I live close to Ashton Tate, and Nantucket so I was very familiar with their software and all the developers who used to come for conferences. I learned on my own by reading books and attending the conferences.

You can use ADS Local for free. If you build your program with ADS, it can recognize and use the REMOTE option ( the actual client server ) or run using the Microsoft networking ( LOCAL ) for free. One set of code does it automatically for you and is very easy to implement.

Using tdatabase ( or tdata as an extension ) makes programming, and networking, so easy and your code far more readable.

Tim

Enrico Maria Giordano wrote:Probably you are using the new CDX with the old DBF. Try to rebuild the CDX.

EMG

Can you send me the DBF and the CDX to reproduce the problem here, please?

EMG