How to add Arguments to powershellinstance in C#

Question

I have a powershell script i need to execute it using c#

string psData = System.IO.File.ReadAllText(@"C:\Users\m\Desktop\power.ps1");
        using (PowerShell PowerShellInstance = PowerShell.Create())
        {
            PowerShellInstance.AddScript(psData);

            IAsyncResult result = PowerShellInstance.BeginInvoke();
            while (!result.IsCompleted)
            {
                Logger.Info("Wait initiated");
                Thread.Sleep(5000);
            }
            Logger.Info("Execution completed");
        }

Using above code script is executing but how can i pass arguments to shell script

I have changed code

string psData = System.IO.File.ReadAllText(@"C:\Users\m\Desktop\power.ps1");
        Process pr = new Process();
        var processStartInfo = new ProcessStartInfo()
        {
            FileName = "powershell.exe",
            Arguments = $"-NoProfile -ExecutionPolicy unrestricted -file \""+psData+"\" \"arg1\" \"arg2\"",
            UseShellExecute = false
        };
        pr.StartInfo = processStartInfo;
        pr.Start();
        pr.WaitForExit();

Have you tried using the AddArgument or AddParameter methods described in the documentation? — fredrik
– fredrik, Commented Apr 29, 2020 at 8:08
@fedrik can i pass all my arguments as a string in one .AddArgument()? it seems for all arguments i need to add them separately — Ijas
– Ijas, Commented Apr 29, 2020 at 8:42

Manish · Accepted Answer · 2020-04-29 10:27:58Z

2

Use AddArgument Method.
More Info -> https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.powershell.addargument?view=pscore-6.2.0

-------- Old Answer-----------------

Not Sure about How to do it via PowerShellInstance class, But you can use Process class for invoking PowerShell script with argument.

var file = @"C:\<Directory>\GetServices.ps1";
var processStartInfo = new ProcessStartInfo()
{
    FileName = "powershell.exe",
    Arguments = $"-NoProfile -ExecutionPolicy unrestricted \"{ps1File}\"",
    UseShellExecute = false
};
Process.Start(startInfo);

For more info -> https://duanenewman.net/blog/post/running-powershell-scripts-from-csharp/
Edit 2

  string psData = @"C:\Users\manis\Desktop\test.ps1";
    Process pr = new Process();
    var processStartInfo = new ProcessStartInfo()
    {
        FileName = "powershell.exe",
        Arguments = $"-NoProfile -ExecutionPolicy unrestricted -file {psData} hello",
        UseShellExecute = false
    };
    pr.StartInfo = processStartInfo;
    pr.Start();
    pr.WaitForExit();

And my Powershell script looks like this

param ($param1)
write-host $param1

edited Apr 29, 2020 at 10:27

answered Apr 29, 2020 at 8:08

Manish

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10 Comments

Ijas Over a year ago

how can i pass arguments using this method

Manish Over a year ago

same as you run in PowerShell, example command -param1 value, in this case, it will be like -Param1 value1 - Param2 value2 in argument property, all will be in string @Iceberg

Ijas Over a year ago

Arguments = $"-NoProfile -ExecutionPolicy unrestricted \"{ps1File}\" arg1 arg2", this is not working

Manish Over a year ago

In this example, -NoProfile and ExecutionPolicy is argument, you can remove those, and add your argument, make sure that your script is running correctly in power shell

Ijas Over a year ago

powershell.exe -NoProfile -ExecutionPolicy unrestricted -file "C:\Users\m\Desktop\power.ps1" "arg1" "arg2" this code works in cmd. But when i pass same code in arguments inside c# it is not working

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