字节到字符串“小数点是个问题”

Question

This code is written in C# dot net

i am receiving DATA in below mention format 49 46 48 50 which is equivalent to 1.02 in decimal format using this simple code

DATA = Convert.ToByte(serialPort1.ReadByte());

later i add DATA in a buffer

buffer[byte_count++] = DATA;   // byte[] buffer = new byte[256];

Now with 49 46 48 50 DATA byte value

buffer[1] contains 49
buffer[2] contains 46
buffer[3] contains 48
buffer[4] contains 50

problem is the decimal point i can convert 49 to 1 by simple subtracting byte value from 48 but how could i convert 46 into the decimal point and save all bytes into an strings

really very appreciate if any one can solve my problem Ashraf

Answer 1

Assuming the data is ASCII use (UPDATE as per comment):

string MyString = Encoding.ASCII.GetString (buffer, 1, 4);

MSDN reference see http://msdn.microsoft.com/de-de/library/system.text.encoding.aspx

Answer 2

Use the Encoding class:

string value = Encoding.ASCII.GetString(buffer, 1, 4);

Note: You have placed the data in the array starting from 1, but array indexes are zero based, so you need to specify the offset and length in the GetString call.

Answer 3

    using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            byte[] bytes = { 49, 46, 48, 50 };
            //get string
            string str = new string(Encoding.ASCII.GetChars(bytes));
            Console.WriteLine(str);

            //get number
            double d;
            if (double.TryParse(str, out d))
            {
                Console.WriteLine(d);
            }

        }
    }
}