How to check a string contains another string

Question

I i have string of numbers separated by commas ,How to check if another string contained in that string .

For example :

If i have a string :

67,782,452,67632,9,155,323

How to check that 155 is in the previous string using linq ?

Answer 1

I assume that you want to check if one of the items in the string is your given string. I would split the string first by the delimiter ,, then use Contains or Any:

string[] items = "67,782,452,67632,9,155,323".Split(',');
bool contains = items.Contains("155");
contains = items.Any(i => i == "155");

The problem with the Contains-check on the string is that also "1550" would contain "155".

Answer 2

For e.g. using String.Contains or Any (you can use string.Contains in your linq query)

string a = "67,782,452,67632,9,155,323";
var splitted = a.Split(',');
if(splitted.Any(x=> x == "155"))
{
 ...
}

or

if(splitted.Contains("155"))
{
 ...
}

or ugly one-liner

var contains = a.Split(',').Any(x=>x=="155");

Answer 3

Split the string and then check the resulting array:

string input = "67,782,452,67632,9,155,323";
string[] values = input.Split(',');
bool contained = values.Contains("155");

Answer 4

Using Linq:

var str = "67,782,452,67632,9,155,323";
var arr = str.Split(',');

var isInString = arr.Any(x => x == "155");