how to convert double into 32 bit hexadecimal

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function in c# to convert double value into 32 hexadecimal?
currently i am able to convert double into 64 bit hexadecimal but i want result in 32 bit hexadecimal..

following code i am using to convert double into 64 bit hexadecimal

C#

public string Converts(double d)
        {
            long ival = BitConverter.DoubleToInt64Bits(d);
            string hex = ival.ToString("X");
            return hex;

        }

Posted 31-Jan-13 19:44pm

Amisha Makkar

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3 solutions

Solution 3

The question makes no sense, because a number cannot be "hexadecimal" or "decimal", only a string representation of a number can be. But a string cannot be "64-bit".

Your code sample is basically correct, but you cannot "convert" it to the code returning int32, by a very simple reason: the type double is 64-bit, it cannot be fit in 32 bits:
http://en.wikipedia.org/wiki/IEEE_floating_point[^].

[EDIT]

You don't need a special conversion. General-case conversions are to array of bytes and from array of bytes. This is a main purpose of this class. In your case:

C#

internal static string ToHex(float value) {
    byte[] bytes = BitConverter.GetBytes(value);
    uint intValue = BitConverter.ToUInt32(bytes, 0);
    return intValue.ToString("X");
} //ToHex

—SA

Posted 31-Jan-13 19:56pm

Sergey Alexandrovich Kryukov

Updated 1-Feb-13 7:19am

v2

Comments

Amisha Makkar 1-Feb-13 2:06am

u are right, then help me how can i convert float value into 32 bit hexadecimal?

Sergey Alexandrovich Kryukov 1-Feb-13 2:22am

Oh, that's different story. Your original code is correct! Just replace 64 with 32 (see BitConverter methods for detail) and double with float. It should work right away.

Also, you can try to type cast double to float. Of course, it will be only successful with some valid subset of double values. And represent this float value as a string, as I mentioned above...

And, when (and if) you see it makes sense, please accept the answer formally (green button)...
—SA

Amisha Makkar 1-Feb-13 2:24am

there is no such bitconverter method.tell me some other solution if you know.

Sergey Alexandrovich Kryukov 1-Feb-13 13:20pm

Ah, OK, please see my updated answer, after [EDIT]. By the way, this way of conversion is more general, you rather want to prefer it.

When you see it makes sense, please accept the answer formally (green button) — thanks.
—SA

Solution 1

http://msdn.microsoft.com/en-us/library/ms131023.aspx[^]

Posted 31-Jan-13 19:51pm

Krunal Rohit

Comments

Sergey Alexandrovich Kryukov 1-Feb-13 1:58am

Sorry, my 1. Isn't it obvious that it cannot work on double, because double is 64-bit?
—SA

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Amisha Makkar · Accepted Answer · 2013-01-31T23:18:00

thanks a lot to all for helping me..
my problem get solved by following code.

public string Converts(double d)
{
float f = (float)d;
byte[] convertToBytes= new byte[32];
string hex = "";
convertToBytes = BitConverter.GetBytes(f);
for (int i = (convertToBytes.Count(x => x != 0))-1; i >=0; i--)
{
hex = hex + ","+ convertToBytes[i].ToString("X");
}

return hex;
}