Vista Forums - View Single Post

08-21-2008

On Aug 21, 5:13*pm, tojo2000 <tojo2...@xxxxxx> wrote:

Quote:

> On Aug 21, 1:25*am, rmq <zhangf...@xxxxxx> wrote:
>
>
>

Quote:

> > On Aug 20, 4:38*pm, tojo2000 <tojo2...@xxxxxx> wrote:

>

Quote:

> > > On Aug 19, 11:40*pm, rmq <zhangf...@xxxxxx> wrote:

>

Quote:

> > > > In powershell console, I typed "calc", then "windows caculator"
> > > > appear, then powershell immediately returned and I could type other
> > > > commands, though "windows caculator" are still running.

>

Quote:

> > > > But if I wrote the following code in VS, I must manually close
> > > > "windows caculator" first, the Main function return.

>

Quote:

> > > > So, why the behaviors are inconsistent?

>

Quote:

> > > > using ....
> > > > namespace Host3 {
> > > > * * class Program {
> > > > * * * * static void Test2() {
> > > > * * * * * * Runspace runspace = RunspaceFactory.CreateRunspace();
> > > > * * * * * * runspace.Open();
> > > > * * * * * * Pipeline pipeline = runspace.CreatePipeline("calc");
> > > > * * * * * * pipeline.Invoke();
> > > > * * * * * * runspace.Close();
> > > > * * * * }
> > > > * * * * static void Main(string[] args) {
> > > > * * * * * * Test2();
> > > > * * * * }
> > > > * * }

>

Quote:

> > > > }

>

Quote:

> > > My C# foo isn't terribly strong, but I believe the problem is that
> > > you're creating a pipeline that is going to keep waiting for output
> > > from the command, because rather than just spawning a process you're
> > > holding open the pipeline for it.

>

Quote:

> > > The same thing happens if *you type this in at the prompt:

>

Quote:

> > > calc | select *

>

Quote:

> > > Your command won't return until calc.exe exits because the pipeline is
> > > waiting for objects.

>

Quote:

> > I agree with you , because the host application does not need a return
> > value, so host return to prompt quickly.
> > but do you know how to config and make the host must wait "calc"
> > return?
> > thx

>
> Like I said, my C# skills aren't the greatest, but does this help?http://www.c-sharpcorner.com/UploadF...llCommandsInCS...

Thank you tojo2000 for your great help!!

08-21-2008	#5 (permalink)
rmq n/a posts	Re: inconsistent behavior On Aug 21, 5:13pm, tojo2000 <tojo2...@xxxxxx> wrote: Quote: > On Aug 21, 1:25am, rmq <zhangf...@xxxxxx> wrote: > > > Quote: > > On Aug 20, 4:38pm, tojo2000 <tojo2...@xxxxxx> wrote: > Quote: Quote: > > > On Aug 19, 11:40pm, rmq <zhangf...@xxxxxx> wrote: > Quote: Quote: > > > > In powershell console, I typed "calc", then "windows caculator" > > > > appear, then powershell immediately returned and I could type other > > > > commands, though "windows caculator" are still running. > Quote: Quote: > > > > But if I wrote the following code in VS, I must manually close > > > > "windows caculator" first, the Main function return. > Quote: Quote: > > > > So, why the behaviors are inconsistent? > Quote: Quote: > > > > using .... > > > > namespace Host3 { > > > > * * class Program { > > > > * * * * static void Test2() { > > > > * * * * * * Runspace runspace = RunspaceFactory.CreateRunspace(); > > > > * * * * * * runspace.Open(); > > > > * * * * * * Pipeline pipeline = runspace.CreatePipeline("calc"); > > > > * * * * * * pipeline.Invoke(); > > > > * * * * * * runspace.Close(); > > > > * * * * } > > > > * * * * static void Main(string[] args) { > > > > * * * * * * Test2(); > > > > * * * * } > > > > * * } > Quote: Quote: > > > > } > Quote: Quote: > > > My C# foo isn't terribly strong, but I believe the problem is that > > > you're creating a pipeline that is going to keep waiting for output > > > from the command, because rather than just spawning a process you're > > > holding open the pipeline for it. > Quote: Quote: > > > The same thing happens if you type this in at the prompt: > Quote: Quote: > > > calc \| select > Quote: Quote: > > > Your command won't return until calc.exe exits because the pipeline is > > > waiting for objects. > Quote: > > I agree with you , because the host application does not need a return > > value, so host return to prompt quickly. > > but do you know how to config and make the host must wait "calc" > > return? > > thx > > Like I said, my C# skills aren't the greatest, but does this help?http://www.c-sharpcorner.com/UploadF...llCommandsInCS... Thank you tojo2000 for your great help!!
My System Specs