String to a variable

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October 9th, 2009, 08:13 AM

greeny122229

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String to a variable

hi guys i have a query, how do you change a string into a variable?

example:
DATE_REC= "13/10/2009"

non-working
bob = "DATE_REC"
Response.Write "<br> TESTING:" & bob
output: date_rec

Working
bob = DATE_REC
Response.Write "<br> TESTING:" & bob
output: 13/10/2009

I need to work out how to get the string converted so i can use it as a variable - any ideas? (reason is this will be in a loop and fed from a recordset)

Many thanks

October 10th, 2009, 10:14 PM

June7

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Please explain more what you are trying to do. Show your loop code. What is fed from the recordset - field names, field values? I don't think you can 'change a string into a variable' nor can I understand the need. If you want to refer to the field names in a loop, here is one way I have done it.

Code:

For j = 0 To rsDataOld.Fields.Count - 1
      If rsDataNew.Fields(j).Name <> "LabNum" Then
           rsDataNew.Fields(j) = rsDataOld.Fields(j)
      End If
Next j

Last edited by June7 : October 10th, 2009 at 10:22 PM.

October 11th, 2009, 11:14 AM

Shadow Wizard

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--moved to the classic ASP forum.

what you need is the EVAL function:

Code:

bob = "DATE_REC"
Response.Write "<br> TESTING:" & Eval(bob)

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October 12th, 2009, 03:51 AM

greeny122229

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excellent - eval() worked great - i always thought this was only for use in JAVA - thanks for the knowledge update.

For the previous reply - i needed to be able to do it without specifyng field names in the code, this allows sql to be updated and build the page without having to update the asp.

Thanks to both of you.

Matt

October 12th, 2009, 04:13 AM

Shadow Wizard

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Quote:

Originally Posted by greeny122229

no problem. Eval is common to most scripting languages, it's one
of their most powerful functions, letting you do dynamic things
at run time that are not possible in compiled code.

October 12th, 2009, 05:35 AM

marco_v

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June7 my understanding is that depending whast in the string you can turn it into a vaiable.

e.g. if you have a string like this
totalamount = "21676"

you can turn this into an iteger by using cint

like so

cint(totalamount)

but obviously if there were any letters in there then it woudl not work.

Comments on this post

June7 disagrees: This is not 'turning into a variable' but converting the data to another type and Cint is a function
that would set a variable, ex: intAmount = Cint(totalamount)

October 12th, 2009, 06:00 AM

Shadow Wizard

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Quote:

Originally Posted by marco_v

both of you missed the original poster intention, the problem is now solved.

Comments on this post

June7 agrees: Not surprised I misunderstood the poster - wrong forum and question wording. Poster is not 'changing
to a variable', meaning an entity that could be referred to again and set to a value.

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