CODEWITHSUNDEEP
c#parsingarduino
pr-
pr-

Reputation: 402

Parse Number Data from Letters C#

I am trying to parse data I am getting from an arduino robot I created. I currently have my serial program up and running and I am able to monitor the data being sent and received by my computer.

The data I am trying to get from the robot includes: speed, range, and heading. The data being sent from the arduino are floats.

I use a single character to denote what the data being received is by either a S,R, or H. For example: R150.6

This would denote that this is range data and 150.6 would be the new range to update the program with.

I'm a little stuck trying to figure out the best way to parse this using c# as this is my first c# program.

I have tried with a similar code to:

if (RxString[0] == 'R')
            Range = double.Parse(RxString);

I read on the site to use regular expressions, however I am having a hard time figuring out how to incorporate it into my code.

This is the link I was using for guidance:

String parsing, extracting numbers and letters

Upvotes: 2

Views: 382

Answers (3)

codingbiz
codingbiz

Reputation: 26386

Since you know the format of the returned data, you can try something like this

data = RxString.SubString(0,1);
value = RxString.SubString(1, RxString.Length-1);

if(data == "R")
  range = double.Parse(value);

Upvotes: 0

burning_LEGION
burning_LEGION

Reputation: 13450

i can use regex for find double:

\d+([,\.]\d+)?

using:

Regex re = Regex.Match("R1.23", "\d+([,\.]\d+)?");
if (re.Success)
{
     double @double = Convert.ToDouble(re.Value, System.Globalization.CultureInfo.InvariantCulture);
}

it garanties to get first decimal from string if your letter migrate in string or adding other symbols

Upvotes: 0

Arithmomaniac
Arithmomaniac

Reputation: 4794

You're almost there. If you're always starting with a single letter, try Range = double.Parse(RxString.Substring(1)). It will read from the second character on.

Upvotes: 4

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