how to read the returned values from running a powershell script

Question

I am work on an asp.net mvc web application and i am calling powershell scripts inside my web application, as follow:-

var shell = PowerShell.Create();

string PsCmd = "add-pssnapin VMware.VimAutomation.Core; $vCenterServer = '" + vCenterName + "';$vCenterAdmin = '" + vCenterUsername + "' ;$vCenterPassword = '" + vCenterPassword + "';" + System.Environment.NewLine;

PsCmd = PsCmd + "$VIServer = Connect-VIServer -Server $vCenterServer -User $vCenterAdmin -Password $vCenterPassword;" + System.Environment.NewLine;

PsCmd = PsCmd + "Get-VMHost " + System.Environment.NewLine;  

shell.Commands.AddScript(PsCmd);

var results = shell.Invoke();

now I will get the following values :-

so can anyone adivce how i can access values such as Build, or loop thorugh thr NetworkInfo ? thanks EDIT full trace picture:-

@CliveDM i mean how i can access it as i usually deal with strongly typed objects where i write something such as modelobkect.buiild;.. — John John
– John John, Commented Aug 18, 2015 at 10:53

Clive DM · Accepted Answer · 2015-08-18 13:43:00Z

1

With dynamic keyword, you wouldn't have to know the strong type of one object. In fact, without having to know the type in advance, you can use this as you expected: a variable can be anything.

For example, I could declare a method like this:

    static void DynamicTest(dynamic arg)
    {
        Console.WriteLine(arg.aaa);
    }

DynamicTest accessed aaa field(or property) in arg without knowing that whether arg itself has aaa or not. Using a dynamic means that you don't want compiler to detect the possible errors that you may or may not access something from a variable that does not actually have it.

You can call this method with:

DynamicTest(new {aaa = "I am accessible"});

it'll run, also you can call this method with:

DynamicTest(1); // I will cause runtime exception

So, in your specific situation, you could define the variable result as dynamic since you now know that you'll get a variable that contains several properties that you want to use.

var res = shell.Invoke()[0];
dynamic obj = res.BaseObject;

Therefore you can use it like a regular variable(without IntelliSense of course).

Console.WriteLine(obj.Build); // Now I can compile yay!

Here.

edited Aug 18, 2015 at 13:43

answered Aug 18, 2015 at 11:52

Clive DM

5614 silver badges13 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

John John Over a year ago

but when i try the following "results.Build" i got the following error 'System.Collections.ObjectModel.Collection<System.Management.Automation.PSObject>' does not contain a definition for 'Build'

Clive DM Over a year ago

@johnG Well, this result seem to be a collection, set a breakpoint on it and inspect what does it have. The picture doesn't seem to be the root, try post the actual tree structure here.

John John Over a year ago

it is under a [0] then i got Base

Clive DM Over a year ago

@johnG, Yep, I edited my answer, have a try then ;-)

Collectives™ on Stack Overflow

how to read the returned values from running a powershell script

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related