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How to create powershell script dynamically from c# based on input params without having physical script file in machine

I know we can can run physical powershell script from c# but how to create powershell script file itself dynamically based on input params.
Kindly suggest.

you can execute powershell script/ commands directly from your c# project.
you'll need to add a reference to system.managment.automation dll in project's references.
example:
function that will take script as a string , execute it and then returns a result:
private string RunScript(string script)
{
Runspace runspace = RunspaceFactory.CreateRunspace();
runspace.Open();
Pipeline pipline = runspace.CreatePipeline();
pipline.Commands.AddScript(script);
pipline.Commands.Add("Out-String");
Collection<PSObject> results = pipline.Invoke();
runspace.Close();
StringBuilder stringBuilder = new StringBuilder();
foreach(PSObject pSObject in results)
{
stringBuilder.AppendLine(pSObject.ToString());
}
return stringBuilder.ToString();
}
function call be like:
Console.WriteLine(RunScript("Your Powershell Script"));
you can check out the full code examples on github - PowershellCommand-CSharp

C# - Utilize Quest active directory cmdlets for Powershell by calling PS script

C# code (Source):
private string RunScript(string scriptText)
{
// create Powershell runspace
Runspace runspace = RunspaceFactory.CreateRunspace();
// open it
runspace.Open();
// create a pipeline and feed it the script text
Pipeline pipeline = runspace.CreatePipeline();
pipeline.Commands.AddScript(scriptText);
// add an extra command to transform the script
// output objects into nicely formatted strings
// remove this line to get the actual objects
// that the script returns. For example, the script
// "Get-Process" returns a collection
// of System.Diagnostics.Process instances.
pipeline.Commands.Add("Out-String");
// execute the script
Collection<psobject /> results = pipeline.Invoke();
// close the runspace
runspace.Close();
// convert the script result into a single string
StringBuilder stringBuilder = new StringBuilder();
foreach (PSObject obj in results)
{
stringBuilder.AppendLine(obj.ToString());
}
return stringBuilder.ToString();
}
Powershell code
#Dummy code for example purpose
ASNP Quest*
#Example of cmdlet I want to use
$Users = Get-QADGroupMember -Identity $Group -Enabled
return $Users.count
As you can see, my goal is to call the script utilizing RunScript above in a Button_Click event in my WPF app. I've been able to correctly call the script but the call to Quest cmdlets clearly doesn't go trough as wanted since I would receive 0 in the above example.
TL;DR
Script is running correctly but calls to Quest cmdlets don't work since it return nothing (or 0 in the above example). Is there something I'm missing ?
EDIT
Important to note that the exact same script ran in Powershell returns the correct values. Calling it from C# don't.

Powershell SQLPS module not importing within C#

I'm attempting to execute a SQL Query from within Powershell, within C#. I have been successful in doing so with ActiveDirectory cmdlets and wanted to take it one step further.
My first issue is while the following format works with ActiveDirectory (and in the ISE) it fails in C#:
using (PowerShell pS = PowerShell.Create())
{
pS.AddCommand("import-module");
pS.AddArgument("sqlps");
pS.Invoke();
}
I've long since had the security set to Unrestricted, but the error I'm getting is:
CmdletInvocationException was unhandled
File C:\Program Files (x86)\Microsoft SQL Server\110\Tools\PowerShell\Modules\sqlps\Sqlps.ps1 cannot be loaded because running scripts is disabled on this system. For more information, see about_Execution_Policies at http://go.microsoft.com/fwlink/?LinkID=135170.
However, if I run like this I get no error, though a later "Get-Module -all" call shows no sign of the module:
using (PowerShell pS = PowerShell.Create())
{
pS.AddScript("Import-Module sqlps");
pS.Invoke();
}
If I then try importing the ActiveDirectory module and calling Get-Module, it shows nothing.
What's going on here?

I'm not that great with C sharp but when calling scripts from outside of powershell there is a flag when executing the program to bypass the execution policy, i.e.
powershell.exe -executionpolicy bypass -command "& '\\somepath\somescript.ps1' "
This allows remote scripts to be called, as even with unrestricted set I still found that it wanted to prompt for the execution of some scripts so for instance in the task scheduler it would simply fail to run.
Also when importing SQLPS I've also found it's useful to add the -DisableNameChecking flag, you may also want to push your location beforehand and pop it afterwards otherwise you will end up in the SQLPS PSdrive with no access to local locations if you need it.

Did you try something like this?
PowerShell ps = PowerShell.Create();
ps.AddScript("set-executionpolicy unrestricted -scope process");
ps.AddScript("import-module sqlps");
ps.AddScript("get-module sqlps");
var m = ps.Invoke();
foreach (var mm in m.Select(x => x.BaseObject as PSModuleInfo))
Console.WriteLine(new { mm.Name, mm.Version });

I had a similar issue with the sqlServer ps module. Looks like when executing from C# you need to load the modules manually into the runspace in order for this to work.
string scriptText = File.ReadAllText("yourScript.ps1");
//This is needed to use Invoke-sqlcommand in powershell. The module needs to be loaded into the runspace before executing the powershell.
InitialSessionState initial = InitialSessionState.CreateDefault();
initial.ImportPSModule(new string[] { #"SqlServer\SqlServer.psd1" });
Runspace runspace = RunspaceFactory.CreateRunspace(initial);
runspace.Open();
using (PowerShell psInstance = PowerShell.Create())
{
psInstance.Runspace = runspace;
psInstance.AddScript(scriptText);
var PSOutput = psInstance.Invoke();
}
Also add all the references located in the SqlServer.psd1. This file is usually found in "C:\Program Files\WindowsPowerShell\Modules\SqlServer". I added to folder to my solution to be able to execute on remote servers.
You need to add Microsoft.SqlServer.BatchParser.dll reference in order to execute invoke-sqlcommand from the Powershell.
You should be able to do the same for sqlps module. Rather use SqlServer as it is newer.

Powershell command through C# code

I want to add through C# code Powershell command or script (what is correct?) variable declaration with default value stored in C# variable.
For example, in Powershell I typing following line
$user = 'Admin'
I want to add this line in C# code.
powershell.AddScript(String.Format("$user = \"{0}\"", userName));
or
powershell.AddCommand(String.Format("$user = \"{0}\"", userName));
I try with AddCommand() but it throws exception. I use PS 2.0.

According to this article How to run PowerShell scripts from C#, you will need something like this:
// create Powershell runspace
Runspace runspace = RunspaceFactory.CreateRunspace();
// open it
runspace.Open();
Pipeline pipeline = runspace.CreatePipeline();
pipeline.Commands.AddScript(String.Format("$user = \"{0}\"", userName));
pipeline.Commands.AddScript("#your main script");
// execute the script
Collection<psobject> results = pipeline.Invoke();
// close the runspace
runspace.Close();
Also see Run Powershell-Script from C# Application question here on Stackoverflow.

C# passing an array to a powershell script

I'm attempting to run a powershell script from C#. I have no problem passing strings to the script however when I try to pass an array to the powershell script an exception gets thrown.
Here is the C# code:
string [] test = {"1","2","3","4"};
RunspaceConfiguration runspaceConfiguration = RunspaceConfiguration.Create();
Runspace runspace = RunspaceFactory.CreateRunspace(runspaceConfiguration);
runspace.ApartmentState = System.Threading.ApartmentState.STA;
runspace.ThreadOptions = PSThreadOptions.UseCurrentThread;
runspace.Open();
RunspaceInvoke invoker = new RunspaceInvoke();
invoker.Invoke("Set-ExecutionPolicy Unrestricted");
Pipeline pipeline = runspace.CreatePipeline();
Command myCmd = new Command(#"C:\test.ps1");
CommandParameter param = new CommandParameter("responseCollection", test);
myCmd.Parameters.Add(param);
pipeline.Commands.Add(myCmd);
// Execute PowerShell script
Collection<PSObject> results = pipeline.Invoke();
Here is the powershell script:
param([string[]] $reponseCollection)
$a = $responseCollection[0]
Every time this code executes it throws:
Cannot index into a null array.
I know that the code to execute the powershell script is correct when passing strings to the powershell script, it has been thoroughly tested.

It works perfectly fine for me.
Only thing I notice is that, in your script params you have $reponseCollection - the s is missing in response. Unless you made a mistake in entering it here, that would be the reason.
It might have seemed to work with string because Powershell doesn't care ( normally) when you assign / use a non-existing variable. But when you index into a null / non-existing variable, it does throw the error.

I think that you need to pass the array to powershell as a string in powershell array format, i.e.,
string test = "('1','2','3','4')";