comparing the array element with an integer

Question

I have an list and I want to compare a dynamic integer with the elements of the array. How should I do that ??

I have a list as findcolnumber whose elements are: 1,8,9,10,11 and they are generated dynamically. I generate one another integer rowcount. If the value of rowcount is equalto any of those single value 1,8,9,10,11, then only it should go in the for loop.

The list findcolnumber is generated dynamically. Also findcolnumber[what should i keep inside this bracket].

if(findcolnumber[] == rowcount) {
    proceed
}

I want to make sure I understand the question. Do you want to know how to check if an integer exists in an array of integers? — Shai Cohen
– Shai Cohen, Commented Mar 14, 2013 at 19:47
It is a list. and yes i want to compare the list with an integer. — user2163048
– user2163048, Commented Mar 14, 2013 at 19:51

Manish Mishra · Accepted Answer · 2013-03-14 20:11:28Z

2

try this:

you will have to include this namespace

using System.Linq;

and then you can do this:

if(findcolnumber.Contains(rowcount))
{
    //your logic
}

where rowcount is some integer i.e.

int rowcount = getDynamicIntegar();

and findcolnumber is:

int[] findcolnumber = {1,8,9,10,11};

linq .Contains returns boolean value, if your dynamic integer will exist in the integral array, .Contains will return true otherwise false

.Contains extension, if you bother to see, will be available for your List<int> as well.

same way you can compare any List or Collection implementing IEnumerable interface

you can only pass the collection's base datatype in .Contains

i.e. if findcolnumber is List<int> then

you can findcolnumber.Contains(integralValueOrVariable)

if findcolnumber is List<string> then

you can findcolnumber.Contains(stringValueOrVariable)

edited Mar 14, 2013 at 20:11

answered Mar 14, 2013 at 19:46

Manish Mishra

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10 Comments

AgentFire Over a year ago

you will have to include this namespace. No you have not to.

user2163048 Over a year ago

It is a list. How should i proceed then ? findcolumn is a list.

Aniket Inge Over a year ago

I will still not use extension methods for simpler lists and arrays.

Aniket Inge Over a year ago

@user2163048 both my method and Manish's method work on Lists, infact any datastructure(including a simple array) that implements the IEnumerable<T> interface.

Manish Mishra Over a year ago

AgentFire, you have to include that namespace, i am pretty sure, and Ankiet, iterating through a loop is a bit longer code thn directly doing .Contains

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