How to Find whether the String Contains characters other than Alphanumerics and Special Character with Other Language mixed

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I have a String which Contains mix of language for ex:

1)Hello, Bing Hope you doing well & for Your info 10-09-2015 planned for Get-together.

in this Case it should return me true as it don't contain any other character other than Alphanumeric with some special character like ,&.

2)Hello, Bing आशा you doing well & for Your info 10-09-2015 की योजना बनाई for Get-together.

But in this Case it should return me false as it contain Hindi Characters other than Alphanumeric with some special character like -,&.

How to Validate this in Asp.net code behind.

Posted 20-Aug-15 1:09am

Member 11335401

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CHill60 20-Aug-15 10:50am

What have you tried?

2 solutions

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CHill60 · Accepted Answer · 2015-08-20T05:44:00

Solution 1

One way would be to check if your string contains characters outside the range of extended ANSI characters.

Using Linq

C#

var s = "Hello, Bing आशा you doing well & for Your info 10-09-2015 की योजना बनाई for Get-together.";
Console.WriteLine(s.Any(c => c > 255));

which is the equivalent of

C#

var s = "Hello, Bing आशा you doing well & for Your info 10-09-2015 की योजना बनाई for Get-together.";
var any = false;
foreach (var c in s)
{
    if (c <= 255) continue;
    any = true;
    break;
}
Console.WriteLine(any);

(You might like to replace that 255 with a constant)

Posted 20-Aug-15 5:44am

CHill60

Updated 20-Aug-15 5:45am

v2

Comments

Member 11335401 20-Aug-15 23:29pm

It Worked Fine for my Case..I never thought this will be so simple, i was trying with Regex Validation and so on for this..Thanks dude.

CHill60 26-Aug-15 8:21am

No problem. I find that Regex can quite quickly become unwieldy.
Note that ppolymorphe has a good point in Solution 2 - you can amend the linq statement to avoid ranges within the character range something like this: var any = s.Any(c => c > 255 || (c <= 165 && c >= 198)); (note the numbers aren't correct - check which ones you would need on-line e.g. http://www.theasciicode.com.ar/[^])

Member 11335401 26-Aug-15 23:42pm

I am just checking whether my string contains letters from regular keyboard characters..So your both solution works perfectly in my case..

Patrice T · Accepted Answer · 2015-08-20T06:25:00

Solution: You have to write your own function that will check your string.
-You have to define the list of chars that are acceptable for you.
-then the function have to check every char in your string against your acceptable set of chars.

Depending on which country you are, Alpha-numeric chars are not the same set.
Problems
- In France, éèàçêüù are acceptable as Alpha chars
- some chars with ascii value under 128 are not alpha-numeric
=+-*/_(){}&|"'<>°@\#,?;.:!%