"chris" <.@.> wrote in message news:ERzBf.324637$2k.115362@pd7tw1no...
| hello, I can't seem to make this work:
| VS2005
| I have a simple program that uses a backgroundworker control to execute a
| long process (webservice call)
|
| if that webservice call fails, i want to raise an exception and display a
| messagebox.
|
| however no matter where i put the Try block to trap the error, it does not
| work.
|
| the only example i could find on it is here:
| http://msdn2.microsoft.com/en-us/library/4852et58.aspx
|
| in which case they do this:
|
|  Private Sub backgroundWorker1_RunWorkerCompleted( _
|  ByVal sender As Object, ByVal e As RunWorkerCompletedEventArgs) _
|  Handles backgroundWorker1.RunWorkerCompleted
|
|    ' First, handle the case where an exception was thrown.
|    If Not (e.Error Is Nothing) Then
|      MessageBox.Show(e.Error.Message)
|    ElseIf e.Cancelled Then
|
| however, i can't figure out how to set the e.Error in the
| RunWorkerCompletedEventArgs.
|
| that same example from the msdn site has the following lines of code in
the
| procedure that's being called by the backgroundworker:
|
|    ' The parameter n must be >= 0 and <= 91.
|    ' Fib(n), with n > 91, overflows a long.
|    If n < 0 OrElse n > 91 Then
|      Throw New ArgumentException( _
|          "value must be >= 0 and <= 91", "n")
|    End If
|
| but this example does not work.  the actual numericUpDown control in the
| form is set to not allow any values outside those parameters, so the
| exception condition ( If n < 0 OrElse n > 91 ) is never true.  if you
| actually passs something outside of those values to the procedure, you get
| the following error when the "Throw New ArgumentException..." line is
| executed:
|
|    ArgumentException was unhandled by user code.
|
| this is the same problem that i have.
|
| to repeat this, copy  the example code from
| http://msdn2.microsoft.com/en-us/library/4852et58.aspx
|
| and change the Maximum property on the numericUpDown1 control to something
| greater than 91.
|
| run the program, enter the value 92 in the numericUpDown1 control, and
click
| Start.
|
| the Throw New ArgumentException line generates an error.
|
| does anybody know how to get the e.Error in the
RunWorkerCompletedEventArgs
| to work?
|
| thanks,
| chris.
|
|
|
|

"chris" <.@.> wrote in message news:ERzBf.324637$2k.115362@pd7tw1no...
> hello, I can't seem to make this work:
> VS2005
> I have a simple program that uses a backgroundworker control to execute a
> long process (webservice call)
>
> if that webservice call fails, i want to raise an exception and display a
> messagebox.
>
> however no matter where i put the Try block to trap the error, it does not
> work.
>
> the only example i could find on it is here:
> http://msdn2.microsoft.com/en-us/library/4852et58.aspx
>
> in which case they do this:
>
>  Private Sub backgroundWorker1_RunWorkerCompleted( _
>  ByVal sender As Object, ByVal e As RunWorkerCompletedEventArgs) _
>  Handles backgroundWorker1.RunWorkerCompleted
>
>    ' First, handle the case where an exception was thrown.
>    If Not (e.Error Is Nothing) Then
>      MessageBox.Show(e.Error.Message)
>    ElseIf e.Cancelled Then
>
> however, i can't figure out how to set the e.Error in the
> RunWorkerCompletedEventArgs.
>
> that same example from the msdn site has the following lines of code in
> the procedure that's being called by the backgroundworker:
>
>    ' The parameter n must be >= 0 and <= 91.
>    ' Fib(n), with n > 91, overflows a long.
>    If n < 0 OrElse n > 91 Then
>      Throw New ArgumentException( _
>          "value must be >= 0 and <= 91", "n")
>    End If
>
> but this example does not work.  the actual numericUpDown control in the
> form is set to not allow any values outside those parameters, so the
> exception condition ( If n < 0 OrElse n > 91 ) is never true.  if you
> actually passs something outside of those values to the procedure, you get
> the following error when the "Throw New ArgumentException..." line is
> executed:
>
>    ArgumentException was unhandled by user code.
>
> this is the same problem that i have.
>
> to repeat this, copy  the example code from
> http://msdn2.microsoft.com/en-us/library/4852et58.aspx
>
> and change the Maximum property on the numericUpDown1 control to something
> greater than 91.
>
> run the program, enter the value 92 in the numericUpDown1 control, and
> click Start.
>
> the Throw New ArgumentException line generates an error.
>
> does anybody know how to get the e.Error in the
> RunWorkerCompletedEventArgs to work?
>
> thanks,
> chris.
>
>
>
>

"chris" <.@.> wrote in message news:jQOBf.219701$tl.217237@pd7tw3no...
| You're right!
|
| in the compiled application it works fine.  only in vs does the error
| appear, and if you click run, it continues and works properly.
|
| (too bad this wasn't more obvious to me ;)
|
| thanks, Jay.
|
| "chris" <.@.> wrote in message news:ERzBf.324637$2k.115362@pd7tw1no...
| > hello, I can't seem to make this work:
| > VS2005
| > I have a simple program that uses a backgroundworker control to execute
a
| > long process (webservice call)
| >
| > if that webservice call fails, i want to raise an exception and display
a
| > messagebox.
| >
| > however no matter where i put the Try block to trap the error, it does
not
| > work.
| >
| > the only example i could find on it is here:
| > http://msdn2.microsoft.com/en-us/library/4852et58.aspx
| >
| > in which case they do this:
| >
| >  Private Sub backgroundWorker1_RunWorkerCompleted( _
| >  ByVal sender As Object, ByVal e As RunWorkerCompletedEventArgs) _
| >  Handles backgroundWorker1.RunWorkerCompleted
| >
| >    ' First, handle the case where an exception was thrown.
| >    If Not (e.Error Is Nothing) Then
| >      MessageBox.Show(e.Error.Message)
| >    ElseIf e.Cancelled Then
| >
| > however, i can't figure out how to set the e.Error in the
| > RunWorkerCompletedEventArgs.
| >
| > that same example from the msdn site has the following lines of code in
| > the procedure that's being called by the backgroundworker:
| >
| >    ' The parameter n must be >= 0 and <= 91.
| >    ' Fib(n), with n > 91, overflows a long.
| >    If n < 0 OrElse n > 91 Then
| >      Throw New ArgumentException( _
| >          "value must be >= 0 and <= 91", "n")
| >    End If
| >
| > but this example does not work.  the actual numericUpDown control in the
| > form is set to not allow any values outside those parameters, so the
| > exception condition ( If n < 0 OrElse n > 91 ) is never true.  if you
| > actually passs something outside of those values to the procedure, you
get
| > the following error when the "Throw New ArgumentException..." line is
| > executed:
| >
| >    ArgumentException was unhandled by user code.
| >
| > this is the same problem that i have.
| >
| > to repeat this, copy  the example code from
| > http://msdn2.microsoft.com/en-us/library/4852et58.aspx
| >
| > and change the Maximum property on the numericUpDown1 control to
something
| > greater than 91.
| >
| > run the program, enter the value 92 in the numericUpDown1 control, and
| > click Start.
| >
| > the Throw New ArgumentException line generates an error.
| >
| > does anybody know how to get the e.Error in the
| > RunWorkerCompletedEventArgs to work?
| >
| > thanks,
| > chris.
| >
| >
| >
| >
|
|