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Asynchronously running multiple PowerShell scripts from C#

Short description of what I`m trying to do:
I am working on a .Net WinForm application from where I am trying to run multiple PowerShell scripts on a remote server and display results on the form.
At this moment I`m executing the scripts synchronously and this is causing me problems with long running scripts.
Any idea on how I could make this function to be executed Asynchronously?
public string NewPsSession(string ServerName, string command)
{
Runspace runspace = RunspaceFactory.CreateRunspace();
runspace.Open();
PowerShell psSession = PowerShell.Create();
psSession.Commands.AddScript("$sessions = New-PSSession -ComputerName " + ServerName + Environment.NewLine
+ "Invoke-Command -session $sessions -ScriptBlock {" + command + "}" + Environment.NewLine
+ "Remove-PSSession -Session $sessions" + Environment.NewLine);
psSession.Commands.AddCommand("Out-String");
Collection<PSObject> results = new Collection<PSObject>();
try
{
results = psSession.Invoke();
}
catch (Exception ex)
{
results.Add(new PSObject((object)ex.Message));
}
runspace.Close();
StringBuilder stringBuilder = new StringBuilder();
foreach (PSObject obj in results)
{
stringBuilder.AppendLine(obj.ToString());
}
return stringBuilder.ToString();
}
Any suggestion would be much appreciated. Thanks!

Change your NewPsSesson method to async and return a Task<string>. Then move your code into a Task<string>.Run() block and await it. Then you can either await your NewPsSession() method or monitor it as a task as I have done in Main()
class Program
{
public static void Main(string[] args)
{
Task<string> task = NewPsSession("", "");
while (!task.IsCompleted)
{
Task.Delay(500).Wait();
Console.WriteLine("Waiting...");
}
Console.WriteLine(task.Result);
Console.WriteLine("Done");
}
public static async Task<string> NewPsSession(string ServerName, string command)
{
var result = await Task<string>.Run(() =>
{
Runspace runspace = RunspaceFactory.CreateRunspace();
runspace.Open();
PowerShell psSession = PowerShell.Create();
psSession.Commands.AddScript("$sessions = New-PSSession -ComputerName " + ServerName + Environment.NewLine
+ "Invoke-Command -session $sessions -ScriptBlock {" + command + "}" + Environment.NewLine
+ "Remove-PSSession -Session $sessions" + Environment.NewLine);
psSession.Commands.AddCommand("Out-String");
Collection<PSObject> results = new Collection<PSObject>();
try
{
results = psSession.Invoke();
}
catch (Exception ex)
{
results.Add(new PSObject((object)ex.Message));
}
runspace.Close();
StringBuilder stringBuilder = new StringBuilder();
foreach (PSObject obj in results)
{
stringBuilder.AppendLine(obj.ToString());
}
return stringBuilder.ToString();
});
return result;
}
}

Send email with PowerShell

I have a function that is able to send email by sending it through PowerShell.
Using the System.Management.Automation reference I am able to use the PowerShell class that allows me to add PowerShell script that will send the email.
If I were to type it directly into the PowerShell window it would look like this:
$password = ConvertTo-SecureString 'PASSWORD' -AsPlainText -Force
$Cred = New-Object System.Management.Automation.PSCredential('sender#email.com', $password)
Send-MailMessage -From 'sender#email.com' -To 'receiver#email.com' -Subject 'Heres the Email Subject' -Body 'This is what I want to say' -SmtpServer 'smtp.office365.com' -Port '587' -UseSsl -Credential $Cred –DeliveryNotificationOption OnSuccess
It is able to send an email but I how would I check if an email wasn't sent?
The function is below.
private void SendEmail()
{
string from = "sender#email.com";
string to = "receiver#email.com";
string subject = "Heres the Email Subject";
string body = "This is what I want to say";
string server = "smtp.office365.com";
string port = "587";
//Password goes here
string password = "PASSWORD";
string pw = "ConvertTo-SecureString '" + password + "' -AsPlainText -Force";
string cred = "New-Object System.Management.Automation.PSCredential('" + from + "', $password)";
string send = "Send-MailMessage -From '" + from + "' -To '" + to + "' -Subject '" + subject + "' -Body '" + body + "' -SmtpServer '" + server + "' -Port '" + port + "' -UseSsl -Credential $Cred -DeliveryNotificationOption OnSuccess";
string psScript = "$password = " + pw + System.Environment.NewLine +
"$Cred = " + cred + System.Environment.NewLine +
send;
using (PowerShell ps = PowerShell.Create())
{
ps.AddScript(psScript);
// invoke execution on the pipeline (collecting output)
Collection<PSObject> PSOutput = ps.Invoke();
// loop through each output object item
foreach (PSObject outputItem in PSOutput)
{
// if null object was dumped to the pipeline during the script then a null
// object may be present here. check for null to prevent potential NRE.
if (outputItem != null)
{
//TODO: do something with the output item
Console.WriteLine(outputItem.BaseObject.GetType().FullName);
Console.WriteLine(outputItem.BaseObject.ToString() + "\n");
}
}
}
}

I found a way to check for errors using ps.HadErrors
using (PowerShell ps = PowerShell.Create())
{
//Add the powershell script to the pipeline
ps.AddScript(psScript);
// invoke execution on the pipeline (collecting output)
Collection<PSObject> PSOutput = ps.Invoke();
//check for any errors
if (ps.HadErrors)
{
foreach (var errorRecord in ps.Streams.Error)
{
Console.WriteLine(errorRecord);
}
}
}

Call Powershell function from C#

Hi to all I want to call in C# a powershell script. Inside ps1 file I have implemented a function.
Powershell script:
Add-Type -path 'C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll'
Add-Type -path 'C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll'
#$CourseName = Read-host "Enter site name"
CreateBlogSubsite($SiteName)
Function CreateBlogSubsite($SiteName)
{
$user = "johndoe#tenant.onmicrosoft.com";
$pass = "P3003ksi434!";
$secpw = $pass | ConvertTo-SecureString -AsPlainText -Force
$SiteURL = "https://tenant.sharepoint.com/sites/SalesSite/"
$Context = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL);
$Creds = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($user,$secpw);
$Context.Credentials = $Creds;
Try {
#Specify Subsite details
$WebCI = New-Object Microsoft.SharePoint.Client.WebCreationInformation
$WebCI.Title = $SiteName + " Blog" # sitename
$WebCI.WebTemplate = "Blog#0" #Blog Site #site template
$WebCI.Url = $SiteName + "_Blog"
$SubWeb = $Context.Web.Webs.Add($WebCI)
$Context.ExecuteQuery()
$URI = $SiteURL + $WebCI.Url
return $URI
#Write-host "Subsite Created Successfully! Url is: " + $SiteName + "1Blog" -ForegroundColor Green
}
catch {
write-host "Error: $($_.Exception.Message)" -foregroundcolor Red
}
}
Here is my console program, where I call PS script:
static void Main(string[] args)
{
// Execute powershell script
// Initialize PowerShell engine
var shell = PowerShell.Create();
//Add the script via a pre-made ps1 file
shell.Commands.AddScript(#"C:\\Users\\zeb\\source\\CreateCourseBlog.ps1");
shell.Commands.AddParameter("$SiteName", "Desti");
// Execute the script
var results = shell.Invoke(); // I want to get output of Poweshell function
Console.Write(results);
}
But it does not works :( . So, does not create subsite when I call script from c#

This should work:
Runspace rs = RunspaceFactory.CreateRunspace();
rs.Open();
using (PowerShell ps = PowerShell.Create())
{
ps.Runspace = rs;
ps.AddScript($#"C:\Users\zeb\source\CreateCourseBlog.ps1 -SiteName Desti");
ps.AddCommand("Out-String");
var psOutput = ps.Invoke();
foreach (var item in psOutput)
{
if (item == null) continue;
Console.WriteLine(item.BaseObject.ToString());
}
if (ps.Streams.Error.Count > 0)
Console.WriteLine($"Errors ({ps.Streams.Error.Count}):\n");
foreach (var err in ps.Streams.Error)
Console.WriteLine(" - " + err);
}
In addition to this code you should add next code to the top of your powershell script:
Param(
[string] $SiteName
)

Calling powershell from .Net Console application

I have written a console application wherein I have called a powershell script from the console. In the powershell script I have written hello world as a return variable and it is running as expected but next time when I change the string from hello world to How are you it is not displaying the changed string. I cannot figure out myself what needs to be done to clear the pipeline or cache.
I have used the below namespace apart from default namespaces
using System.Management;
using System.Management.Automation;
using System.Collections.ObjectModel;
using System.Management.Automation.Runspaces;
static void Main(string[] args)
{
string _str = string.Empty;
_str= RunScript(#"C:\Powershell_Scripts\Test.ps1");
Console.WriteLine("Input String is =" + str);
Console.Read();
}
private static 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("Set-ExecutionPolicy -Scope Process -ExecutionPolicy Unrestricted");
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();
pipeline.Streams.ClearStreams();
// 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 Script i.e. Test1.ps1
sleep 3
$a=""
$a = "Hello word"
return $a

Here is a sample how to use the PowerShell in a Runspace
using System;
using System.Collections.Generic;
using System.Text;
using System.Management;
using System.Management.Automation;
using System.Management.Automation.Runspaces;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
// Create a runspace.
using (Runspace myRunSpace = RunspaceFactory.CreateRunspace())
{
myRunSpace.Open();
using (PowerShell powershell = PowerShell.Create())
{
// Create a pipeline with the Get-Command command.
powershell.AddScript("Set-ExecutionPolicy -Scope Process -ExecutionPolicy Unrestricted");
powershell.AddScript(#"C:\Users\you\Desktop\a.ps1");
// add an extra command to transform the script output objects into nicely formatted strings
// remove this line to get the actual objects
powershell.AddCommand("Out-String");
// execute the script
var results = powershell.Invoke();
powershell.Streams.ClearStreams();
powershell.Commands.Clear();
// convert the script result into a single string
StringBuilder stringBuilder = new StringBuilder();
foreach (PSObject obj in results)
{
stringBuilder.AppendLine(obj.ToString());
}
Console.WriteLine(stringBuilder.ToString());
}
}
}
}
}
Further reference: Creating a constrained runspace

Here is a code which runs as expected
enter code here
try
{
if (System.IO.File.Exists(#"c:\disk\op.txt") && (new FileInfo(#"c:\disk\op.txt").Length != 0))
{
System.IO.File.Move(#"c:\disk\op.txt", #"c:\disk\Previous_op_" + DateTime.Now.ToString("dd_MM_yyyy hh mm") + ".txt");
log.Info("Previous Output File Successfully Renamed");
}
// TODO: Add delete logic here
log.Info("Input ActionResult - Server " + Server);
log.Info("Input ActionResult - Volume " + Volume);
log.Info("Input ActionResult - Size " + size);
string userID = "dir\\" + Session["Uname"].ToString();
string userpassword = Session["Upwd"].ToString();
log.Info("username " + userID);
StringBuilder stringBuilder = new StringBuilder();
var con = new WSManConnectionInfo();
log.Info("Pushing username in PSCredential- " + userID.ToString().Trim());
con.Credential = new PSCredential(userID.ToString().Trim(), userpassword.ToString().Trim().ToSecureString());
Runspace runspace = RunspaceFactory.CreateRunspace(con);
runspace.Open();
Pipeline pipeline = runspace.CreatePipeline();
pipeline.Commands.AddScript("Set-ExecutionPolicy -Scope Process -ExecutionPolicy Unrestricted");
string _str = #"-Server " + Server + " -Volumeletter " + Volume + ": -deltasize " + size + " -Logfile c:\\disk\\op.txt -username " + userID + " -password " + userpassword;
log.Info("Parameter string format- " + _str.Substring(0, _str.IndexOf("-password") + 9));
pipeline.Commands.AddScript(#"C:\disk\diskerr.ps1 " + _str.ToString());
pipeline.Commands[0].MergeMyResults(PipelineResultTypes.Error, PipelineResultTypes.Output);
pipeline.Commands.Add("Out-String");
var results = pipeline.Invoke();
runspace.Close();
runspace.Dispose();
foreach (PSObject obj in results)
{
stringBuilder.AppendLine(obj.ToString());
log.Info("Output from powershell: " + obj.ToString());
}
if (System.IO.File.Exists(#"c:\disk\op.txt") && (new FileInfo(#"c:\disk\op.txt").Length != 0))
{
fileStream = new FileStream(#"c:\test\op.txt", FileMode.Open, FileAccess.Read);
using (var streamReader = new StreamReader(fileStream, Encoding.UTF8))
{
_consoleOutput = streamReader.ReadToEnd();
}
_output = Regex.Replace(_consoleOutput, #"\r\n?|\n", "<br />");
}
return Content(_output);
}
catch (Exception ex)
{
log.Info("Error stackTrace inside Input ActionResult " + ex.StackTrace.ToString());
log.Info("Error Message inside Input ActionResult " + ex.Message.ToString());
return View();
}
You need to change the directory path and the powershell file name.

How to keep a process alive after remote PowerShell script completion?

I'm trying to start Zookeeper and Solr remotely via PowerShell scriptblock.
Then I see that the process is created in the remote machine (by checking the port 2181 of Zookeeper). And on the script completion it is being terminated.
How do I keep this alive even after the completion?
This code below stops the remote process on script completion. The script.ps1 does a lot of things that includes starting Zookeeper and Solr asJob.
int iRemotePort = 5985;
string strShellURI = #"http://schemas.microsoft.com/powershell/Microsoft.PowerShell";
string strAppName = #"/wsman";
WSManConnectionInfo ci = new WSManConnectionInfo(
false,
machineName,
iRemotePort,
strAppName,
strShellURI,
new PSCredential(userName, secure));
Runspace runspace = RunspaceFactory.CreateRunspace(ci);
runspace.Open();
using (PowerShell ps = PowerShell.Create())
{
session.Log(#"c:\temp\script.ps1 -serverID " + counter + " -copySolrConfig $" + status + " -currentHost \"" + machineName + "\" -IP_PORT_List \"" + String.Join(", ", machineWithPort) + "\"");
ps.Runspace = runspace;
ps.AddScript(#"c:\temp\script.ps1 -serverID " + counter + " -copySolrConfig $" + status + " -currentHost \"" + machineName + "\" -IP_PORT_List \"" + String.Join(", ", machineWithPort) + "\"");
var results = ps.Invoke();
foreach (var result in results)
{
session.Log(result.ToString());
}
}
runspace.Close();

So after a long try I came to a conclusion, Using power-shell script alive is not a appropriate way to keep zookeeper and solr running effectively. So moved it as a windows service and installed it on the remote machine via WiX.