Thread: String characters to int.

Hello,

I'm trying to get the int value of each character in a string and then add them all together so I can do a 1's complement of the total value. I'm trying to do simple checkum kinda of thing for verification of data.

For example:


string DPacket = "Hello World!";

I would like to have each character added and do the ones complement.
Will it be easier to convert first to int and then add or any other easier way?

so my result should be the decimal value addition of each character and then do the ones complement to that.

what it comes to mind for me is the ASCII codes of the every char.This is what you say?

Originally Posted by itsme86

Code:

int sum = ASCIIEncoding.ASCII.GetBytes("This is a string!").Select(b => (int)b).Sum();
Console.WriteLine(sum);

Gives me: 1517

This worked great thanks.
Now I have a string called dataPacket that I send over serial to another device. It must be sent as a string as shown below.

Code:

int sum = ASCIIEncoding.ASCII.GetBytes("This is a string!").Select(b => (int)b).Sum();
int checkSum = ~sum; //Do the 1's complement

string dataPacket = (DP1 + DP2 + DP3 + DP4 + DP5 + checkSum); //data to be sent out.

but since checkSum is of type int I can't send it over and get an error. I've tried converting checkSum to a string using string s = Convert.ToString(checkSum); but get the wrong data sent over. It just converted the checkSum to a string "-1518" which is incorrect. It should've sent over the hex value FA 12