Does Visual Basic support macro substitution in some form

Question

0.00/5 (No votes)

See more:

Hello All

I am a visual foxpro developer just learning visual basic. Visual Foxpro supports macro substitution. I have not been able to find anything like it in visual basic. Let me explain what I mean in case it's called something else in VB.

In VFP you can create variables similar to the following:

strCommand = "Select * from "
strTable = "Products"

Then we concatenate them:

strSqlSelect = strCommand + StrTable
so that strSqlSelect = "Select * from Products"

Then we issue a macro substitution as follows:

&strSqlSelect

The ampersand (indicating macro substitution) instructs the compiler to ignore the variable but to execute the command inside the variable.

Does VB have anything similar. I am trying to develop one linq command that will query several different tables based upon the value of the variable passed to the command. I have only seen examples where each query is typed separately. Does anyone have an example.

Thanks for your help.

Larry

Posted 22-Jan-10 8:39am

larrytoone

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

loyal ginger · Answer 1 · 2010-01-22T09:18:00

I believe there is no such thing as macro substitution in VB. I used to use macro substitution a lot when I was using dBASEIII many years ago. So when I later started to use other languages one of the things I was looking for was macro substitution. Up to now I cannot find anything like that.

Some people may say it is because dBASEIII was interpreted, not compiled. I have not used Visual FoxPro, but I believe it is compiled. I would like to see more on this topic.