Vista - RE: How can I get pipeline output if Invoke throws???

I hope someone can correct me but I think this is similar to the following

{ } | % { } | ... | % { throw "help" } | ...

My understanding is all information is lost if an exception is thrown within
a pipeline. I guess this is an argument for non-terminating errors uh?

One idea the help for Invoke does say you can moniter the state of the
pipeline but its not obvious to me whether this will signal intermediary
results.

Here is the outline I suppose they could have made listening to this event
more complex but I'm not sure how.

1) Register this event handler which will populate the
PipelineStateEventArgs class when signaled
http://msdn.microsoft.com/en-us/libr...ed(VS.85).aspx Pipeline.StateChanged

2) The PipelineStateInfo property of the PipelineStateEventArgs class
returns a PipelineStateInfo class that you will need
http://msdn.microsoft.com/en-us/libr...rs(VS.85).aspx

3) The PipelineStateInfo class has a property state which returns a
PipelineState enumeration
http://msdn.microsoft.com/en-us/libr...rs(VS.85).aspx

4) You are finally there. The PipelineState enumeration has the current
state.

http://msdn.microsoft.com/en-us/libr...te(VS.85).aspx PipelineState Enumeration


btw is this for a script or C#? I'm curious a the Pipeline class is the same
as the Powershell pipe that us scriptors are used to. I can see why this
would be necessary for C# but I don't know the advantage in a script is the
reason I ask.


bob

"CodeSlinger" wrote:

It was difficult to find the information in a usable format but I discovered
if you use add Out-Default command to the pipleline the errors can be merged
with the output delivered to the host and so nothing is thrown. Thanks, Dave

"Bob Landau" wrote: