Solved

numeric string

Posted on 2006-07-15
3
286 Views
Last Modified: 2010-04-16
Hi experts ..

string numeric = "2002901036";

Is There A Built-In Function That Check if a string is numeric or not ???
0
Comment
Question by:DrAske
  • 2
3 Comments
 
LVL 22

Accepted Solution

by:
Mohammed Nasman earned 250 total points
ID: 17113810
Hello,

There's no build in one for C#(there's one with vb.net)

but you could build one easily, look at this method


public bool IsNumber(string s)
            {
                  try
                  {
                        Double.Parse(s);
                        return true;
                  }
                  catch
                  {
                        return false;
                  }
            }

            private void button1_Click(object sender, System.EventArgs e)
            {
                  if (IsNumber(textBox1.Text))
                        MessageBox.Show("Valid Number");
             else
                        MessageBox.Show("Not Valid Number");
            
            }

HTH,

Regards,
Mohammed Nasman
0
 
LVL 9

Author Comment

by:DrAske
ID: 17113830
I made something similar ..
if(TxtCardNumber.Text == "" || checkNumeric(TxtCardNumber.Text) || TxtCardNumber.TextLength<16)
{
      MessageBox.Show("Enter The Valid Card Number .","Valid Number",MessageBoxButtons.OK);
      TxtCardNumber.ResetText();
      TxtCardNumber.Focus();
}

private bool checkNumeric(string check)
{
      foreach(char x in check)
      {
      if(!Char.IsNumber(x))
            return true;
      }
               return false;
}

But I think using try .. catch is better ..
Thanx Mohammad ;o)
0
 
LVL 22

Expert Comment

by:Mohammed Nasman
ID: 17113835
You are welcome DrAske,

Glad to help you :o)
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

Introduction Although it is an old technology, serial ports are still being used by many hardware manufacturers. If you develop applications in C#, Microsoft .NET framework has SerialPort class to communicate with the serial ports.  I needed to…
Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …
In this video I am going to show you how to back up and restore Office 365 mailboxes using CodeTwo Backup for Office 365. Learn more about the tool used in this video here: http://www.codetwo.com/backup-for-office-365/ (http://www.codetwo.com/ba…

895 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

13 Experts available now in Live!

Get 1:1 Help Now