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POUnable to read Registry value using PowerShell in C#
 

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  1. POUnable to read Registry value using PowerShell in C#
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    <p>I am not able to read specific registry values using PowerShell in C#. Here is the code:</p> <p>Calling function:</p> <pre><code> public static string UserDisplayName() { // PowerShell Command: (Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\SessionData\1').LoggedOnDisplayName return GetPowerShellOutputString(@"(Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\SessionData\1').LoggedOnDisplayName"); } </code></pre> <p>Function definition:</p> <pre><code> private static string GetPowerShellOutputString(string PsCmd) { try { string PsOut = string.Empty; Debug.Write("PsCmd: " + PsCmd + "; "); Runspace rs = RunspaceFactory.CreateRunspace(); rs.Open(); Pipeline pipeline = rs.CreatePipeline(); pipeline.Commands.AddScript(PsCmd); Collection&lt;PSObject&gt; results = pipeline.Invoke(); rs.Close(); foreach (PSObject obj in results) if (obj != null) PsOut += obj.ToString() + ", "; PsOut = (PsOut == string.Empty) ? strUnavailableString : PsOut.TrimEnd(',', ' '); Debug.WriteLine("PsOut: " + PsOut); return PsOut; } catch (Exception ex) { Debug.WriteLine("! " + ex.Message + ex.InnerException + "\n"); return strUnavailableString; } } </code></pre> <p>However, the same Function definition is working perfectly if I am trying to read any other registry value e.g.:</p> <pre><code> public static string UserOUPath() { try { if (UserDomain() == SystemInformation.ComputerName) return strUnavailableString; // Non-domain account //For consistant performance, grab OU from registry instead of AD. string userSID = WindowsIdentity.GetCurrent().User.ToString(); string ouPath = @"HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Group Policy\State\" + userSID; string ou = GetPowerShellOutputString("(Get-ItemProperty -Path '" + ouPath + "').'Distinguished-Name'"); ou = ou.Remove(0, ou.IndexOf(",", 0) + 1); // Drop leading CN stuff ou = ou.Remove(ou.IndexOf(",DC=", 0), ou.Length - ou.IndexOf(",DC=", 0)); // Drop trailing DC stuff ou = ou.Replace(",OU=", "/"); ou = ou.Replace("OU=", "/"); ou = FlipOU(ou); if (ou == null) throw new NullReferenceException(); return ou; } catch { return strUnavailableString; } } </code></pre> <p>For the first call (UserDisplayName()) when I did Debug mode, the <strong><em>results</em></strong> object is returning <strong><em>null</em></strong>. However if I run the same PowerShell Command in PowerShell window it is giving the value. </p> <p>I am stumbled upon this as I am not able to get why and what is happening?</p>
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    1. USSavindraSingh
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      1. VTDownMod
    1. CO*"read specific registry values using PowerShell in C#"* You what? Why? Can't you read registry values using C# methods?
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      1. USTomalak
    2. COI see this time after time here. If you're developing in c#, USE c# and it's .net classes. PowerShell is slow and complicated and it uses the same .Net classes that you could access directly in c# much easier and faster.
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      1. USFrode F.
    3. COWhy would you ever do this!? You're passing a *PowerShell* script into *C#* which *already has* much better functionality for reading registry values! You're over-complicating this.
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      1. UStnw
 

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