Parsing Parameters of a Powershell Script. How to do this from C#?

Question

param(
    [string]$name,
    [string]$template
)

I have a powershell script with the following parameters. I am executing this powershell script from C#. I would like to parse the script and get the parameters. In future the script may change and so will the parameter count.

Keith Hill · Accepted Answer · 2014-02-13 16:16:05Z

2

I'd use the PowerShell Parser class for this. The following example is in PowerShell for convenience but it could easily be done in C#:

PS> $str = 'param([string]$name,[string]$template)'
PS> $ast = [System.Management.Automation.Language.Parser]::ParseInput($str, [ref]$null, [ref]$null)
PS> $ast.ParamBlock.Parameters.Name.Extent.Text
$name
$template

answered Feb 13, 2014 at 16:16

Keith Hill

204k44 gold badges370 silver badges377 bronze badges

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

Comments

Arsen Mkrtchyan · Accepted Answer · 2014-02-13 11:53:01Z

1

var str = @"param([string]$name,[string]$template)";
var matches = Regex.Matches(str, "\\[(?<type>\\w+)\\]\\$(?<name>\\w+)").OfType<Match>()
                   .Select(m => new 
                                {
                                   name = m.Groups["name"].Value, 
                                   type = m.Groups["type"].Value
                                });
foreach (var m in matches)
{
    // check m.name and m.type
}

answered Feb 13, 2014 at 11:53

Arsen Mkrtchyan

50.9k33 gold badges155 silver badges187 bronze badges

10 Comments

BRAHIM Kamel Over a year ago

the OP says In future the script may change and so will the parameter count. ???

Arsen Mkrtchyan Over a year ago

@K.B. this code grab all params of type [type]$name, independent from param count

BRAHIM Kamel Over a year ago

ok well but what if the params type change [integer] for example it will not work right ?

BRAHIM Kamel Over a year ago

huuuum give it a try

Arsen Mkrtchyan Over a year ago

param([integer]$name,[string]$template) you mean? just checked, it works

|

Collectives™ on Stack Overflow

Parsing Parameters of a Powershell Script. How to do this from C#?

2 Answers 2

Comments

10 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

10 Comments

Your Answer

Sign up or log in

Post as a guest

Related