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i made button component in runtime and i want every button clicked there executing unique procedure.

for example 

exec('showmessage('+quotedstr('hello word')+');');

How to executing string as procedure in delphi 7 like eval in php or livebinding in delphi xe3?

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  • Delphi is compiled, so there's no such thing like eval in php, and you're maybe missunderstanding what LiveBinding is Commented Mar 5, 2013 at 17:05
  • Eh. Delphi is not PHP...and even in PHP, eval is almost always the wrong way to go about things. :P Does Delphi have any equivalent to lambdas, anonymous functions, or whatever? Commented Mar 5, 2013 at 17:06
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    you can use a scripting engine like remobjects.com/ps.aspx Commented Mar 5, 2013 at 17:07
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    Step away from the keyboard for a second. You're doing so many wrong things at once, it's scary. :P Delphi doesn't eval. Even if it did, eval'ing code out of a database is all kinds of brokenness waiting to happen. Step back and think about what you really want to do...and how that's likely to be feasible in a language that can't interpret itself on the fly. Commented Mar 5, 2013 at 17:07
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    If you stopped trying to store code in a database, then the whole problem of how to execute it would go away. Consider that. Why are you storing textual code in a database (or anywhere, for that matter)? Consider a template system instead; the database stores various values that you plug in to your already-written functions, so you just have to pass a limited number of values to those functions as parameters. Commented Mar 5, 2013 at 17:11

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7

Delphi has no such facility. It's a compiled language, and the compiler only runs on the developer's system; you're not allowed to distribute the compiler with your program.

Instead, you can use any of a number of scripting tools, such as DWScript. It supports a language syntax similar to that of Delphi. It has some built-in functions, and you can define others from the host program to expose in the script environment.

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For scripting libraries, see this question...
Finally I found Tfsscript component of FastReport. there is a Evaluate function that I can use. thanks the suggestions.
4

What you are trying to do is not possible in Delphi. It does not have an interpreter. What you need is to embed a scripting language.

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have a look at this while looking for an answer

http://blog.angress.de/cracking/dynamicprocexecution_delphi/

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Link only answers are discouraged, and the link provided is not pertinent to this question

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