MBR IT/.NET 247 : exceptions in timer dependent class on microsoft.public.dotnet.languages.vb

exceptions in timer dependent class

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This message was discovered on microsoft.public.dotnet.languages.vb.

Przemo

I have Class1 which performs some data calculations on
System.Timers.Timer.Elapsed event.

Public Class Class1
Private WithEvents tmrReadSerialData As New
System.Timers.Timer

Public Sub New()
tmrReadSerialData.Interval = 1000
End Sub

Public Sub StartIt()
tmrReadSerialData.Start()
End Sub

Public Sub StopIt()
tmrReadSerialData.Stop()
End Sub

Private Sub tmrReadSerialData_Tick(ByVal sender As
System.Object, ByVal e As System.Timers.ElapsedEventArgs)
Handles tmrReadSerialData.Elapsed

' This line should throw an exception because of
' different culture setting (2.54 in spite of 2,54)
' but it doesn't, exits sub and Beep is not performed
Dim a As Double = Double.Parse("2.54", New
Globalization.CultureInfo("pl-PL"))
Beep

End Sub

Public Sub Test()

' Ta linia nie powoduje błędu - konwersja liczby
zapisanej w ustawieniach regionalnych USA
Dim b As Double = Double.Parse("2.54", New
Globalization.CultureInfo("en-US"))
Dim a As Double = Double.Parse("2.54")
Beep()

End Sub

End Class

When I use this object from my WinForm and click button
which performs Class1.StartIt, tmrReadSerialData_Tick
exits on line which should cause an exception but without
it!
When I place same code in my WinForm exceprion occures.

1. Is that exception caused or not?
2. Is Timer.Elapsed method run in different thread?
3. What to do to be informed of such exceptions in run-
time (program can be stopped but with normal info about
exception) - I was looking for long time what was the
reason for not executing some code after it.

Thank you

Reply to this message...

Cor Ligthert

Przemo,

I am curious, what is the reason you are using the C# code in your VBNet
project for conversion, while some of the the more advantage C# users would
like to have those powerfull VBNet convert methods?

Cor

Reply to this message...

Przemo

Thanks for replay, but I don't nderstad.
Am I using C# code?? I am using VB.NET.
This code compiles in vb.net project with no errors.
So what did you mean?

[Original message clipped]

Reply to this message...

Cor Ligthert

Przemo,
[Original message clipped]

small subset. When you would do by instance this,

For i = 1 to 1000
a +=5
Next

And than ask something as why is this not efficient to a newsgroup.

It is using as well VBNet code, however most people use
a = 5*1000

So I was curious why you are doing that?

Cor

Reply to this message...

Przemo

My code was only example (small peace of my Comm parsing
Class).
I didn't want to know if it is efficient or not.
I couldn't understand why this line which should cause
exception do not do it in my class.

Write if you can help.

[Original message clipped]

Reply to this message...

Cor Ligthert

Przemo,

This throws an exception when I try this.

Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
' This line should throw an exception because of
' different culture setting (2.54 in spite of 2,54)
' but it doesn't, exits sub and Beep is not performed
Dim a As Double = Double.Parse("2.54", New
Globalization.CultureInfo("pl-PL"))
Beep()
End sub

I hope this helps?

Cor

Reply to this message...

Ledder H.

Sorry, but did you help Przemo?
I can't understand you

best regards

[Original message clipped]

Reply to this message...

Cor Ligthert

[Original message clipped]

I thought this is a newsgroup, not a kind of helpdesk.

Now I can't understand you?

Cor

Reply to this message...

	System.Double
	System.EventArgs
	System.Globalization.CultureInfo
	System.Object
	System.Timers.ElapsedEventArgs
	System.Timers.Timer

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