How to validate name in C#

Question

1.00/5 (2 votes)

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How to validate name in C#

Example.
Consider name which has a Space, Full Stop(dot) and only words

Ravi Kumar.P

How to validate the above name pattern.

Posted 11-Mar-14 0:47am

KUMAR619

Updated 14-Feb-17 17:38pm

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Kornfeld Eliyahu Peter 11-Mar-14 6:49am

Read about regex - it can do magic...

KUMAR619 11-Mar-14 6:52am

Can you help me for the above name

Kornfeld Eliyahu Peter 11-Mar-14 7:06am

I can. However, doing so means that I write your code. That's something that not fit to me...
I prefer that you do some reading (use Google) about regex in c#, than try to write some code. AS your request is simple it's possible that you will come up with something working at the very first time, but if not you can come back with that code so someone show you how to fix it...

SwarupDChavan 11-Mar-14 6:58am

do you need to do the validation on the client-side??

KUMAR619 11-Mar-14 6:59am

yes

4 solutions

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Peter Leow · Accepted Answer · 2014-03-11T01:01:00

Solution 1

Try this:

@"^[A-Za-z]+[\s][A-Za-z]+[.][A-Za-z]+$"

Read more: regex-match[^]

Posted 11-Mar-14 1:01am

Peter Leow

Updated 11-Mar-14 1:03am

v3

Comments

KUMAR619 11-Mar-14 7:07am

Thanks if name has N number of spaces

such

Ram Ram

Kumar Kumar Kumar
Ravi Ravi

Ram

Sometimes without space

Then what is the common match string to achieve this type of problem

Peter Leow 11-Mar-14 7:28am

Try this: @"^[A-Za-z\s]+[.][A-Za-z\s]+$"
A very good tutorial here: http://www.codeproject.com/Articles/9099/The-Minute-Regex-Tutorial
Learn to DIY yourself.

Kornfeld Eliyahu Peter 11-Mar-14 7:08am

[A-Za-z] is not exactly word in regex...\w is defined as [A-Za-z0-9_].
In his case I think \b should be even better...

OriginalGriff · Accepted Answer · 2014-03-11T01:05:00

Try Regex:

C#

public static Regex regex = new Regex(
      "^(\\b[A-Za-z]*\\b\\s+\\b[A-Za-z]*\\b+\\.[A-Za-z])$",
    RegexOptions.IgnoreCase
    | RegexOptions.CultureInvariant
    | RegexOptions.IgnorePatternWhitespace
    | RegexOptions.Compiled
    );

...
   if (regex.IsMatch(InputText))
      {
      // All ok
      }

"Is there any way to get string for the above names"

Try:

C#

public static Regex regex = new Regex(
      "^(\\b[A-Za-z]*\\b(\\s+\\b[A-Za-z]*\\b)*(\\.[A-Za-z])?)$",
    RegexOptions.IgnoreCase
    | RegexOptions.CultureInvariant
    | RegexOptions.IgnorePatternWhitespace
    | RegexOptions.Compiled
    );

Kan07 · Accepted Answer · 2014-03-11T01:13:00

C#

function ValidateData(){

      var TextVal= document.getElementById('<%=txtbox1.ClientID %>').value;
          if (TextVal== "") {
              alert("text box Can't be empty ");
              document.getElementById('<%=txtbox1.ClientID%>').focus();
              return false;
          }
          
          var textpart = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
          var validtext = textpart .test(TextVal);
         
          if (!validtext ) {
              alert("Your textbox contain invalid ..... again.");
              document.getElementById('<%=txtEmailID.ClientID%>').focus();
              return false;}

}
else
return true

call ValidateData() in clientclik event ......

gagandeep.pratihar · Accepted Answer · 2014-03-11T18:29:00

Solution 4

Use Regular Expression .
Regex.IsMatch(string,string) method can be used which take your name string and regular expression string as parameters.

Posted 11-Mar-14 18:29pm

gagandeep.pratihar