read data from arduino and react when data is larger than a zero
in c#
i'm trying to read data from arduino so when the data is not "0" i will get a reaction.
The signal from arduino is ok and displays on the label but i cannot use the "<" condition.
private void ArduinoTMR_Tick(object sender, EventArgs e)
{
string ard1 = Arduino.ReadLine();
label2.Text = ard1;
if (ard1 > "0")
{
label2.BackColor = Color.Red;
}
else
label2.BackColor = Color.Blue;
}
c# serial-port
edited Nov 21 '18 at 15:27
gre_gor
4,28092732
asked Nov 21 '18 at 11:17
Jozee MediaJozee Media
265
add a comment |
in c#
i'm trying to read data from arduino so when the data is not "0" i will get a reaction.
The signal from arduino is ok and displays on the label but i cannot use the "<" condition.
private void ArduinoTMR_Tick(object sender, EventArgs e)
{
string ard1 = Arduino.ReadLine();
label2.Text = ard1;
if (ard1 > "0")
{
label2.BackColor = Color.Red;
}
else
label2.BackColor = Color.Blue;
}
c# serial-port
edited Nov 21 '18 at 15:27
gre_gor
4,28092732
asked Nov 21 '18 at 11:17
Jozee MediaJozee Media
265
And what is your question?
– svtag
Nov 21 '18 at 11:31
1
why do you even think that you can compare astringwith the>operator?? you can't. You would first have to convert it to int
– sLw
Nov 21 '18 at 11:39
add a comment |
in c#
i'm trying to read data from arduino so when the data is not "0" i will get a reaction.
The signal from arduino is ok and displays on the label but i cannot use the "<" condition.
private void ArduinoTMR_Tick(object sender, EventArgs e)
{
string ard1 = Arduino.ReadLine();
label2.Text = ard1;
if (ard1 > "0")
{
label2.BackColor = Color.Red;
}
else
label2.BackColor = Color.Blue;
}
c# serial-port
edited Nov 21 '18 at 15:27
gre_gor
4,28092732
asked Nov 21 '18 at 11:17
Jozee MediaJozee Media
265
in c#
i'm trying to read data from arduino so when the data is not "0" i will get a reaction.
The signal from arduino is ok and displays on the label but i cannot use the "<" condition.
private void ArduinoTMR_Tick(object sender, EventArgs e)
{
string ard1 = Arduino.ReadLine();
label2.Text = ard1;
if (ard1 > "0")
{
label2.BackColor = Color.Red;
}
else
label2.BackColor = Color.Blue;
}
c# serial-port
c# serial-port
edited Nov 21 '18 at 15:27
gre_gor
4,28092732
asked Nov 21 '18 at 11:17
Jozee MediaJozee Media
265
edited Nov 21 '18 at 15:27
gre_gor
4,28092732
asked Nov 21 '18 at 11:17
Jozee MediaJozee Media
265
edited Nov 21 '18 at 15:27
gre_gor
4,28092732
edited Nov 21 '18 at 15:27
gre_gor
4,28092732
edited Nov 21 '18 at 15:27
gre_gor
4,28092732
4,28092732
asked Nov 21 '18 at 11:17
Jozee MediaJozee Media
265
asked Nov 21 '18 at 11:17
Jozee MediaJozee Media
265
asked Nov 21 '18 at 11:17
Jozee MediaJozee Media
265
265
And what is your question?
– svtag
Nov 21 '18 at 11:31
1
why do you even think that you can compare astringwith the>operator?? you can't. You would first have to convert it to int
– sLw
Nov 21 '18 at 11:39
add a comment |
And what is your question?
– svtag
Nov 21 '18 at 11:31
1
why do you even think that you can compare astringwith the>operator?? you can't. You would first have to convert it to int
– sLw
Nov 21 '18 at 11:39
And what is your question?
– svtag
Nov 21 '18 at 11:31
And what is your question?
– svtag
Nov 21 '18 at 11:31
1
1
why do you even think that you can compare a
string with the > operator?? you can't. You would first have to convert it to int– sLw
Nov 21 '18 at 11:39
why do you even think that you can compare a
string with the > operator?? you can't. You would first have to convert it to int– sLw
Nov 21 '18 at 11:39
add a comment |
2 Answers
2
active
oldest
votes
It doesn't work, because you're comparing two strings and not numbers. Mathematical operators like > can't be applied to strings.
This is what you're looking for:
private void ArduinoTMR_Tick(object sender, EventArgs e)
{
string ard1 = Arduino.ReadLine();
label2.Text = ard1;
if(!int.TryParse(ard1, out var state)) return; // try to convert text to a number
label2.BackColor = state > 0 ? Color.Red : Color.Blue; // now compare the parsed number to the number 0
}
If what you get from your Arduino is only 1 or 0, you could think about parsing it to a byte as well.
answered Nov 21 '18 at 11:40
Tobias TenglerTobias Tengler
1,6331419
add a comment |
You can't use > or < operators with the strings, you have to do this before:
int ard1converted=Convert.ToInt32(ard1);
and then
if (ard1converted> 0)
//do something
answered Nov 21 '18 at 12:15
matteo craccomatteo cracco
1019
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
It doesn't work, because you're comparing two strings and not numbers. Mathematical operators like > can't be applied to strings.
This is what you're looking for:
private void ArduinoTMR_Tick(object sender, EventArgs e)
{
string ard1 = Arduino.ReadLine();
label2.Text = ard1;
if(!int.TryParse(ard1, out var state)) return; // try to convert text to a number
label2.BackColor = state > 0 ? Color.Red : Color.Blue; // now compare the parsed number to the number 0
}
If what you get from your Arduino is only 1 or 0, you could think about parsing it to a byte as well.
answered Nov 21 '18 at 11:40
Tobias TenglerTobias Tengler
1,6331419
add a comment |
It doesn't work, because you're comparing two strings and not numbers. Mathematical operators like > can't be applied to strings.
This is what you're looking for:
private void ArduinoTMR_Tick(object sender, EventArgs e)
{
string ard1 = Arduino.ReadLine();
label2.Text = ard1;
if(!int.TryParse(ard1, out var state)) return; // try to convert text to a number
label2.BackColor = state > 0 ? Color.Red : Color.Blue; // now compare the parsed number to the number 0
}
If what you get from your Arduino is only 1 or 0, you could think about parsing it to a byte as well.
answered Nov 21 '18 at 11:40
Tobias TenglerTobias Tengler
1,6331419
add a comment |
It doesn't work, because you're comparing two strings and not numbers. Mathematical operators like > can't be applied to strings.
This is what you're looking for:
private void ArduinoTMR_Tick(object sender, EventArgs e)
{
string ard1 = Arduino.ReadLine();
label2.Text = ard1;
if(!int.TryParse(ard1, out var state)) return; // try to convert text to a number
label2.BackColor = state > 0 ? Color.Red : Color.Blue; // now compare the parsed number to the number 0
}
If what you get from your Arduino is only 1 or 0, you could think about parsing it to a byte as well.
answered Nov 21 '18 at 11:40
Tobias TenglerTobias Tengler
1,6331419
It doesn't work, because you're comparing two strings and not numbers. Mathematical operators like > can't be applied to strings.
This is what you're looking for:
private void ArduinoTMR_Tick(object sender, EventArgs e)
{
string ard1 = Arduino.ReadLine();
label2.Text = ard1;
if(!int.TryParse(ard1, out var state)) return; // try to convert text to a number
label2.BackColor = state > 0 ? Color.Red : Color.Blue; // now compare the parsed number to the number 0
}
If what you get from your Arduino is only 1 or 0, you could think about parsing it to a byte as well.
answered Nov 21 '18 at 11:40
Tobias TenglerTobias Tengler
1,6331419
answered Nov 21 '18 at 11:40
Tobias TenglerTobias Tengler
1,6331419
answered Nov 21 '18 at 11:40
Tobias TenglerTobias Tengler
1,6331419
answered Nov 21 '18 at 11:40
Tobias TenglerTobias Tengler
1,6331419
1,6331419
add a comment |
add a comment |
You can't use > or < operators with the strings, you have to do this before:
int ard1converted=Convert.ToInt32(ard1);
and then
if (ard1converted> 0)
//do something
answered Nov 21 '18 at 12:15
matteo craccomatteo cracco
1019
add a comment |
You can't use > or < operators with the strings, you have to do this before:
int ard1converted=Convert.ToInt32(ard1);
and then
if (ard1converted> 0)
//do something
answered Nov 21 '18 at 12:15
matteo craccomatteo cracco
1019
add a comment |
You can't use > or < operators with the strings, you have to do this before:
int ard1converted=Convert.ToInt32(ard1);
and then
if (ard1converted> 0)
//do something
answered Nov 21 '18 at 12:15
matteo craccomatteo cracco
1019
You can't use > or < operators with the strings, you have to do this before:
int ard1converted=Convert.ToInt32(ard1);
and then
if (ard1converted> 0)
//do something
answered Nov 21 '18 at 12:15
matteo craccomatteo cracco
1019
answered Nov 21 '18 at 12:15
matteo craccomatteo cracco
1019
answered Nov 21 '18 at 12:15
matteo craccomatteo cracco
1019
answered Nov 21 '18 at 12:15
matteo craccomatteo cracco
1019
1019
add a comment |
add a comment |
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And what is your question?
– svtag
Nov 21 '18 at 11:31
1
why do you even think that you can compare a
stringwith the>operator?? you can't. You would first have to convert it to int– sLw
Nov 21 '18 at 11:39