Solved

Execute code at runtime in delphi7

Posted on 2012-04-06
8
596 Views
Last Modified: 2012-06-21
Hello,

I am searching for a solution or a component which allows me to execute code at runtime.
for example..
i have a delphi form with a memo on it. i have a string built at runtime from values in a database like
if ('copy(memo1.lines[0],1,3)' = 'XYZ' ) then
showmessage(string from database)

can someone help me to get through this?

regards
prampatel
0
Comment
Question by:prampatel
8 Comments
 
LVL 19

Expert Comment

by:Thommy
ID: 37816432
The only way I can think of, is sending your code to Delphi command line compiler and then execute...
DCC32.EXE, the Delphi Command Line Compiler
0
 
LVL 31

Expert Comment

by:Marco Gasi
ID: 37816436
I'm sorry but I don't understand. In your example it seems like you are comparing the values of a certain portion of a memo text and a predefined string and if they match you show a message. Or you want that one writes code in the memo and the app have to execute it? If so, this is not possible, since Delphi is a compiled language. If the first thing is what you wnat to do, I don't see the problem... I think i'm missing something...
0
 

Author Comment

by:prampatel
ID: 37816443
hi,

thanx for the response..but i think that borland specifically mentions that the compiler cannot be used externally.
I think maybbe i need to use a scripting component to do this, but dont want to purchase one unless i am sure it can do what i need to do.

regards
prampatel
0
 
LVL 19

Expert Comment

by:Thommy
ID: 37816456
For using DCC32.EXE in your application you will need a Delphi license!!!
Compile Delphi Code In Runtime

Perhaps using a script component could be an option for you...
TORRY's: Components > Tools > Scripts
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 

Author Comment

by:prampatel
ID: 37816500
hi marqusG,

"In your example it seems like you are comparing the values of a certain portion of a memo text and a predefined string and if they match you show a message."

that is exactly what i want to do.. but the strings to compare will be generated from values or commands stored in a database...

i dont have require the user to input code and execute it .

hope this clears the question.

hi thommy..i do have a license, but ill be deploying the application to multiple computers , in that case all of them will have delphi installed wont i?
i have looked at the torry scripts page, still wondering which one would be best for my requirement

regards
pram.patel
0
 

Author Comment

by:prampatel
ID: 37816560
hi marqusG,

sorry i misinterpreted your question .
i will be generating this string
maincmd := if ('copy(memo1.lines[0],1,3)' = 'XYZ' ) then.
so it could also be
maincmd := "shellexecute somefile"
or maincmd = "command from database,var from database,message from database"

thats what i am trying to do...

regards
prampatel
0
 
LVL 37

Accepted Solution

by:
Geert Gruwez earned 100 total points
ID: 37817592
the text in your memo must go through a parser/interpreter to examine what it has to do
... in essence you want "a programming language" for your customers

here is a sample
http://www.delphigeist.com/2009/11/another-interpreter-with-source-code.html

if you want to write your own interpreter, take a look at the design pattern for an interpreter
http://sourcemaking.com/design_patterns/interpreter/delphi
0
 

Author Comment

by:prampatel
ID: 37821325
hi Geert_Gruwez,

thanks for the solution..it works for me perfectly...have been able to make my own parser based on the links you have provided.

Thanx everyone for all the help.

regards
prampatel
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

A lot of questions regard threads in Delphi.   One of the more specific questions is how to show progress of the thread.   Updating a progressbar from inside a thread is a mistake. A solution to this would be to send a synchronized message to the…
Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.
Need to grow your business through quality cloud solutions? With everything required to build a cloud platform and solution, you may feel like the distance between you and the cloud is quite long. Help is here. Spend some time learning about the Con…

932 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now