Problem with strings

Felice Massaro

Hi,

I am a beginner and I cannot solve this problem.

I have a multilines textbox (txtOutput) that receive data from the serial port. I can see the data there and all its working fine.

I would like to get the last string from such textbox that is something numeric like" 12" or 1021" and store it into a variable.

Then If the value I get is < 1000 I would like that value to be shown and update textBox2.text otherwhise show and update textBox3.text.

Can someone please help. I would really appreciate.

Kind regards

Felice

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes13y ago
Accepted answer
Try the following which, on a button click, gets all the numbers (including decimal and negative numbers) in the textbox, identifies the last one and then compares it with 1000. This is done using a regular expression:

using System.Text.RegularExpressions;

// .....

private void button1_Click(object sender, EventArgs e)
{
if (txtOutput.Text.Length > 0)
{
MatchCollection mc = Regex.Matches(txtOutput.Text, @"(\+|-)?\d+(\.\d+)?");
if (mc.Count > 0)
{
double value = double.Parse(mc[mc.Count - 1].Value);
if (value < 1000)
{
textBox2.Text = value.ToString();
textBox3.Text = ""; // if needed
}
else
{
textBox3.Text = value.ToString();
textBox2.Text = ""; // if needed
}
}

}
}
Felice Massaro13y ago
Thanks a lot. It worked the first time without any problem.
Your help has been really appreciated.
Kind regards
Felice