string to byte array then byte array to string conversion error

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I have below code

C#

/////////////////////////////////////// 
byte[] bytestring= somefunction(); 
//somefunction() return a byte array..
 string st1 =  Encoding.UTF32.GetString(bytestring);
 byte[] bytestring2 = Encoding.UTF32.GetBytes(st1);
 bool st =  bytestring2.Equals(bytestring);

// RESULT IS st = false  
// Desired result st = true
///////////////////////////////////////////////////

I getting st = false, But I think it should be true...
what is the problem in ablove code I tried UTF8 , UnicodeEncoding .but result is same.
If bytestring2 has encoded value then how decode it( how get my old value)...

Thanks in Advance
Hemant Singh[^]

Posted 27-Dec-12 2:06am

Hemant Singh Rautela

Updated 27-Dec-12 3:07am

v5

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Thomas Daniels 27-Dec-12 8:09am

What's the error?

Hemant Singh Rautela 27-Dec-12 9:00am

the boolean variable st value is false.
But i think it should be true....

2 solutions

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*Suvabrata Roy* · Answer 1 · 2012-12-27T03:14:00

Solution 2

Hi,

String.Equals don't have any overload on byte array, when you pass byte array to equals function that treated as object, so no compilation error occur but it's returns false.

:)

Posted 27-Dec-12 3:14am

Suvabrata Roy

Comments

Hemant Singh Rautela 27-Dec-12 12:53pm

It is not String.Equals

bytestring2 and bytestring both are byte array.

It is object.Equals(object) method.

Suvabrata Roy 27-Dec-12 23:56pm

Then Check your SomeFunction(), it returning properly or not

Oleksandr Kulchytskyi · Answer 2 · 2012-12-27T02:21:00

Solution 1

You must exactly know what is going on under the hood in method

byte[] bytestring= somefunction();

For exampple what is it converted fron a specific text encoding to byte array,
and what i have seen, you just try to convert it bytes with UTF encoding , and check thei equality

Posted 27-Dec-12 2:21am

Oleksandr Kulchytskyi

Comments

Hemant Singh Rautela 27-Dec-12 12:56pm

somefunction() returns a byte array, it is implementd for RSA algorithm

Oleksandr Kulchytskyi 27-Dec-12 14:24pm

I saw that somefuc returns a bytes array , that is all what i know.
But what exact it does? which encodings , and so on??