Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

check if string contains all numeric data

Posted on 2006-07-07
1
Medium Priority
?
461 Views
Last Modified: 2010-05-18
I'm sure this is very easy to do, I need to check if a string to see if it only contains numbers I was wondering if there was a built in function for something like this.  Also is there a built in function to search a string for a particular character.
0
Comment
Question by:ICPooreman
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 17

Accepted Solution

by:
geobul earned 300 total points
ID: 17058236
Hi,

About your second question see Pos function:

i := Pos('x', StrVar);

About the first one:

function IsNumeric(const s: string): boolean;
var i: integer;
begin
  result := false;
  for i := 1 to Length(s) do begin
    if not (s[i] in ['0'..'9']) then exit;
  end;
  result := true;
end;

// usage:
procedure TForm1.Button1Click(Sender: TObject);
begin
  if IsNumeric(Edit1.Text) then ShowMessage('OK');
end;

Regards, Geo
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

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

The uses clause is one of those things that just tends to grow and grow. Most of the time this is in the main form, as it's from this form that all others are called. If you have a big application (including many forms), the uses clause in the in…
Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
In this video, Percona Solution Engineer Rick Golba discuss how (and why) you implement high availability in a database environment. To discuss how Percona Consulting can help with your design and architecture needs for your database and infrastr…
Suggested Courses

705 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