Can we have the OR operator in the string variable in asp.net?

Question

Possible Duplicate:
Using C# to check if string contains a string in string array

Can we have the multiple strings in a single string variable using logical OR operator(|) in asp.net ?

string _Text = "";
string _str = "abc" | "xyz" | "123";
if(_Text.Contains(_str))
{
    foo("_str");
}

Thanks,

Have you tryed the code your self? Operator '|' cannot be applied to operands of type 'string' and 'string' — Peter, Oct 04 '12 at 11:57
@PoweRoy Python allows `"abc" or "xyz" or "123"` with the result `"abc"`, because every non-empty string is evaluated to true. http://ideone.com/STyWh — halex, Oct 04 '12 at 11:59
http://stackoverflow.com/questions/2912476/using-c-sharp-to-check-if-string-contains-a-string-in-string-array — Habib, Oct 04 '12 at 12:00
its not working, rather array or some other collection will do, but still i want to know is there any way out ... ? — Krishn, Oct 04 '12 at 12:01
@halex: I mean 'can you do this in any other language with the desired result', compiled doesn't mean anything. — RvdK, Oct 04 '12 at 12:01
@PoweRoy Ah ok. Just wanted to show proof of concept of this one line in python :) — halex, Oct 04 '12 at 12:03
@peer: let me rephrase myself, is there any way out to execute function foo(_str), with the same _str value(instead of other _str values) which satisfies the if condition, using string variable ... though we can do the same with an array ... hope i made myself clear. — Krishn, Oct 04 '12 at 12:14

score 3 · Answer 1 · answered Oct 04 '12 at 11:58

3

use regex Regex.IsMatch(_Text, @"^(abc)|(xyz)|(123)$")

answered Oct 04 '12 at 11:58

burning_LEGION

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cuongle · Answer 2 · 2012-10-04T12:16:33.460

2

No, you can't, but you can work around:

string _Text = "abc"
var _str = new[] {"abc", "xyz", "123"};

if(_str.Any(s => _Text.Contains(s))
{
     foo(_Text);
}

edited Oct 04 '12 at 12:16

answered Oct 04 '12 at 11:58

cuongle

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@peer: you changed the differently, roll back – cuongle Oct 04 '12 at 12:17

score 1 · Answer 3 · answered Oct 04 '12 at 12:01

It's not totally clear to me what you want to do. The or (|) isn't going to work anyway. Do you need something like this?

string haystack = "The quick brown fox jumps over the lazy dog";
string[] needles = {"fox", "the", "dog"};

foreach (var n in needles)
{
    if (haystack.Contains(n))
    {
        Console.WriteLine("'{0}' found in '{1}'", n, haystack);
    }
}

score 0 · Answer 4 · answered Oct 04 '12 at 11:58

0

No, you should use any sort of container for that (array/list/etc).

answered Oct 04 '12 at 11:58

RvdK

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score 0 · Answer 5 · edited Oct 04 '12 at 12:24

0

No it can't be done your way. But How about using an array

string _Text = "";
string[] _str = {"abc" , "xyz" , "123"};
if(_str.Contains(_Text))
{
    foo(_Text);
}

edited Oct 04 '12 at 12:24

Peter

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answered Oct 04 '12 at 11:58

Nikhil Agrawal

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1

@Cuong Le: this code works fine, I would rename the _str variable. You should try to compile your own code, assigning a array to a string will give you a error. – Peter Oct 04 '12 at 12:06
@peer: Right. The Regex answer of Burning_LEGION is doing what my answer is doing but with regex. – Nikhil Agrawal Oct 04 '12 at 12:08
@peer: thanks, edited, what if text = "abcdsd"? – cuongle Oct 04 '12 at 12:09
@CuongLe: Still compile and work. It will not go inside if statement. – Nikhil Agrawal Oct 04 '12 at 12:11
I fixed both of your code samples, however the main question whould be what the meaning of "aa" | "b" whould be. I can't figure it out. – Peter Oct 04 '12 at 12:15
@peer: why LINQ when Contains works? – Nikhil Agrawal Oct 04 '12 at 12:22
You are correct, the variable name confused me. – Peter Oct 04 '12 at 12:25

score 0 · Answer 6 · answered Oct 04 '12 at 11:58

Both operands have to be booleans:

Logical OR Operator: ||

"The logical OR operator (||) returns the boolean value true if either or both operands is true and returns false otherwise. The operands are implicitly converted to type bool prior to evaluation, and the result is of type bool. Logical OR has left-to-right associativity."

Can we have the OR operator in the string variable in asp.net?

6 Answers6