How to execute PowerShell script (ps1 file) from C# code

Tarun Kumar Chatterjee
.Net – Technology Specialist
May 31, 2016
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There are two way-out I found out to call the ps1 file from C#:

1. Created a batch file which will have the code to execute the ps1 file & the batch file will be executed by C# code

Batch files Code:

@echo offPowershell.exe -executionpolicy remotesigned -File  <ps1 file path>

C# code to execute the batch file:

 System.Security.SecureString pass = new System.Security.SecureString();
             string strPass = Admin Password";
             foreach (char c in strPass)
 System.Diagnostics.Process.Start(@"Batch File Path","Admin User ID", pass,"Domain Name");

2. Created RunSpace & Pipeline to execute the ps1 file directly from C# code

 private Collection<PSObject> RunPsScript(string psScriptPath)
             string psScript = string.Empty;
             if (File.Exists(psScriptPath))
                 psScript = File.ReadAllText(psScriptPath);
                 throw new FileNotFoundException("Wrong path for the script file");
             RunspaceConfiguration config = RunspaceConfiguration.Create();
             PSSnapInException psEx;
             //add Microsoft SharePoint PowerShell SnapIn
             PSSnapInInfo pssnap = config.AddPSSnapIn("Microsoft.SharePoint.PowerShell", out  psEx);
             //create powershell runspace
             Runspace cmdlet = RunspaceFactory.CreateRunspace(config);
             RunspaceInvoke scriptInvoker = new RunspaceInvoke(cmdlet);
             // set powershell execution policy to unrestricted
             scriptInvoker.Invoke("Set-ExecutionPolicy Unrestricted");
             // create a pipeline and load it with command object
             Pipeline pipeline = cmdlet.CreatePipeline();
                 // Using Get-SPFarm powershell command 
                 // this will format the output
                 Collection<PSObject> output = pipeline.Invoke();
                 // process each object in the output and append to stringbuilder  
                 StringBuilder results = new StringBuilder();
                 foreach (PSObject obj in output)
                 return output;
             catch(Exception ex)
                 return null;

Here is my ps1 file code to delete the list items:

 if ((Get-PSSnapin -Name "Microsoft.SharePoint.PowerShell" ) -eq $null) {
     Add-PSSnapin "Microsoft.SharePoint.PowerShell" -ErrorAction SilentlyContinue  
 $rootWeb= Get-Spweb <"Site URL">   
 $listToProcess = $rootWeb.GetList("List URL") 
 $NumberOfItemsToDeleteInBatch = 1000
 if($listToProcess -ne $null)
     $numberOfItemsToRetrieve = $NumberOfItemsToDeleteInBatch;
     $camlQueryString = "<Where><Neq><FieldRef Name='ID'/><Value Type='Counter'>-1</Value></Neq></Where>"
     $viewFields="<FieldRef Name='ID' />"
     $camlQuery = New-Object -TypeName "Microsoft.SharePoint.SPQuery" -ArgumentList @($listToProcess.DefaultView);
     $itemCount = 0;
     $listId = $listToProcess.ID;
     [System.Text.StringBuilder]$batchXml = New-Object "System.Text.StringBuilder";
     $batchXml.Append("<?xml version=`"1.0`" encoding=`"UTF-8`"?><Batch>");
     $command = [System.String]::Format( "<Method><SetList>{0}</SetList><SetVar Name=`"ID`">{1}</SetVar><SetVar Name=`"Cmd`">Delete</SetVar></Method>", $listId, "{0}" );
     $listItems = $listToProcess.GetItems($camlQuery)
     $camlQuery.ListItemCollectionPosition = $listItems.ListItemCollectionPosition
     foreach ($item in $listItems)
         if($item -ne $null)
             $batchXml.Append([System.String]::Format($command, $item.ID.ToString())) | Out-Null;$itemCount++;
     $rootWeb.ProcessBatchData($batchXml.ToString())   | Out-Null;
     #Write-Host "Item deleted successfully" + $itemCount;
 while ($query.ListItemCollectionPosition -ne $null)
     #Write-Host "Cannot find list: " $listToProcess;
 Stop-SPAssignment -Global -AssignmentCollection $assignmentCollection;
  #Write-Host "Finished";

One issue I found at the time of executing ps1 file script from C# & pipeline.invoke() was throwing error "Cannot invoke this function because the current host does not implement it." But it was deleted the list item successfully.

To resolve the issue I had to comment out Write-Host from ps1 script & execute the C# code, that’s it.

Let’s add one item in the list


As a result of executing the RunPsScript or the code written to execute batch file, the item will be deleted from the list


Happy Coding

Tarun Kumar Chatterjee

Author Info

Tarun Kumar Chatterjee
.Net – Technology Specialist
Rate this article
[Total: 2    Average: 1.5/5]
Tarun has been working in IT Industry for over 8+ years. He holds a B-tech degree. He is passionate about learning and sharing the tricks and tips in .Net windows/Web. more

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