Find that the string is valid or not

Question

0.00/5 (No votes)

See more:

i have a problem which i have solved but i am searching for better solution.
my problem is i have a string say

string mystr = "hello//abc";

if string contain continuously two or more slash like above string it is invalid string

What I have tried:

C#

private bool isvalidString(string str) 
        {
            int i = 0;
            int lastIndex = -2;
            bool retvalue = true;
            do
            {
                i = str.IndexOf("/", i + 1);
                if (lastIndex + 1 == i)
                {
                    retvalue = false;
                    break;
                }
                lastIndex = i;
                if (i==-1)
                {
                    break;
                }
   
            } while (true);


            return retvalue;
        }

Posted 25-Oct-16 1:39am

srilekhamenon

Updated 25-Oct-16 1:53am

Add a Solution

2 solutions

Solution 1

C#

string SomeString = "hello//abc";
           Regex r = new Regex("^[a-zA-Z0-9]*$");
           if (r.IsMatch(SomeString))
           {
               lbl_valid.Text = "Valid";
           }
           else
           {
               lbl_valid.Text = "In-Valid";
           }

Posted 25-Oct-16 1:51am

Vikram Dalwadiya

Updated 25-Oct-16 1:52am

v2

Comments

srilekhamenon 25-Oct-16 7:57am

solution is not correct it is showing 'hello/abc' as invalid string

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)

OriginalGriff · Accepted Answer · 2016-10-25T01:53:00

Solution 2

Try:

C#

private bool isvalidString(string str) 
    {
    return !str.Contains(@"//");
    }

Posted 25-Oct-16 1:53am

OriginalGriff

Comments

srilekhamenon 25-Oct-16 8:02am

best solution :)