convert byte array to integer in c#

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C#

float input = 25;
            byte[] buffer = BitConverter.GetBytes(input);

buffer contains 0x00 0x00 0xc8 0x41.I need to convert it back to float i.e 25.I knows only hex values,Please tell how to do it.

Posted 13-Aug-13 23:47pm

kalaivanan from Bangalore, India

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ridoy 14-Aug-13 6:06am

If you want it in float then why you post question with a title of integer?!

3 solutions

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CPallini · Answer 1 · 2013-08-14T00:08:00

Solution 3

What's wrong with BitConverter.ToSingle[^] method?

e.g.

C#

float input = 25;
byte[] buffer = BitConverter.GetBytes(input);
float output = BitConverter.ToSingle(buffer,0);

Posted 14-Aug-13 0:08am

CPallini

Comments

kalaivanan from Bangalore, India 14-Aug-13 6:34am

Hi CPallini,
float output = BitConverter.ToSingle(buffer,0);
above line having compile time exception.

CPallini 14-Aug-13 6:40am

What is a 'compile time exception'? It compiles (and runs) fine, on my system.

Sergey Alexandrovich Kryukov 14-Aug-13 7:01am

This is the only correct answer, my 5.
Gosh, we have a lot of answer spam, including OP's.
—SA

CPallini 14-Aug-13 7:51am

Thank you.

kalaivanan from Bangalore, India · Answer 2 · 2013-08-13T23:58:00

C#

private Single ConvertHexToSingle(string hexVal)
       {

           try
           {

               int i = 0, j = 0;

               byte[] bArray = new byte[4];

               for (i = 0; i <= hexVal.Length - 1; i += 2)
               {

                   bArray[j] = Byte.Parse(hexVal[i].ToString() + hexVal[i + 1].ToString(), System.Globalization.NumberStyles.HexNumber);

                   j += 1;

               }

               Array.Reverse(bArray);

               Single s = BitConverter.ToSingle(bArray, 0);

               return (s);

           }
           catch (Exception ex)
           {

               throw new FormatException("The supplied hex value is either empty or in an incorrect format.  Use the " +

                   "following format: 00000000", ex);

           }

       }

Code-Hunt · Answer 3 · 2013-08-13T23:51:00

Solution 1

converting-binary-value-from-bitarray-to-an-int-and-back-in-c[^]

how-i-can-convert-bitarray-to-single-int[^]

Check the link..hope it will help..