Array string is not working in if else condition

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hi,

I am getting value">100.00" in m ={prices[0].Trim()}

and I am getting value ">100.00" in n.

C#

string[] m = { prices[0].Trim() };
string[] n = new string[] {">100.00"};

if (m == n)
{
....
}
else
{
...
}

In the above if condition is true (m == n). but cursor does not go to if condition, it goes to else condition. how to fix this. why it is not going to if condition. please help me out. Thank you.

Posted 4-Dec-13 19:47pm

christhuxavier

Updated 4-Dec-13 21:14pm

Orcun Iyigun

v2

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phil.o · Answer 1 · 2013-12-04T19:53:00

Solution 1

Arrays are reference types; so when you write

C#

if (m == n)

you are indeed comparing references, which are two distinct objects in this context.

As they seems to only contain one element, you could write:

C#

if (m[0].Equals(n[0]))

If they contain more than one element, then you have to implement your own string arrays comparison, one that meets your needs.

Posted 4-Dec-13 19:53pm

phil.o

Comments

christhuxavier 5-Dec-13 2:33am

Hi phil . Thank you. i got solution by you.

phil.o 5-Dec-13 2:44am

You're welcome :)
I invite you to also take a look at both other solutions; I never had to use Linq SequenceEqual() method, it may be worth the look.

christhuxavier 5-Dec-13 3:37am

okay thank you for suggesting me.

Peter Leow · Answer 2 · 2013-12-04T20:16:00

Solution 2

If you are comparing 2 string arrays,you can use SequenceEqual of linq, check this out:

http://www.dotnetperls.com/sequenceequal[^]

Posted 4-Dec-13 20:16pm

Peter Leow

Updated 4-Dec-13 20:17pm

v2

BillWoodruff · Answer 3 · 2013-12-04T20:28:00

If you are using .NET FrameWork 3.5 or later, you can use the Linq 'SequenceEqual operator to test for the equality of all elements of two IEnumerables:

C#

string[] ary1 = { "1", "2", "3", "1" };
string[] ary2 = { "1", "2", "3", "1" };

// in some method:
bool isAryEqual = ary1.SequenceEqual(ary2);

If you are going to use 'SequenceEqual, I suggest you study the examples here: [^].