“Write-Error” (write in Powershell, used in C#) works BUT Write-Debug doesn´t work – Why?

Question 1

I have written a program with C#, that creates a logfile and fills this by using log4net. This program starts powershell-scripts. The scripts use log4net, too.
It works:

> C#:   
> ps.Runspace.SessionStateProxy.SetVariable("myMethod",(Action<Level,string>)myMethod);
> ps.AddCommand(System.IO.Path.Combine(pathScripts, testSkripte[i].ToString()));  
> ps.Invoke();

> Powershell:                     
> $ScriptLog.Invoke([log4net.Core.Level]::Debug, "TestFile_Debug")                     
> $ScriptLog.Invoke([log4net.Core.Level]::Warn, "TestFile_Warn") $ScriptLog         
> $ScriptLog.Invoke([log4net.Core.Level]::Error, "TestFile_Error")

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> C#:

> ps.Runspace.SessionStateProxy.SetVariable("myMethod",(Action)myMethod);

> ps.AddCommand(System.IO.Path.Combine(pathScripts, testSkripte[i].ToString()));

> ps.Invoke();

> Powershell:

> $ScriptLog.Invoke([log4net.Core.Level]::Debug, "TestFile_Debug")

> $ScriptLog.Invoke([log4net.Core.Level]::Warn, "TestFile_Warn") $ScriptLog

> $ScriptLog.Invoke([log4net.Core.Level]::Error, "TestFile_Error")

Now I want add to use the standard Write-Error, Write-Debug, etc. CMDlets in my Script.
(looks like here – answer of Hinek).

Powershell:
   Write-Warning "Write-Warning"      
  AND         
   Write-Error "Write-Error"

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Powershell:

Write-Warning "Write-Warning"

AND

Write-Error "Write-Error"

works, but the following doesn´t work:

Write-Debug "Write-Debug"         (I don´t get an item in my logfile)   OR    
Write-Debug "Write-Debug" -debug  (for this I get an item in my logfile, but ...)

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Write-Debug "Write-Debug" (I don´t get an item in my logfile) OR

Write-Debug "Write-Debug" -debug (for this I get an item in my logfile, but ...)

… I get an error in my logfile, too. The error looks like this:

[2010-10-22 13:10:58,097] DEBUG : Write-Debug                                     
[2010-10-22 13:10:58,113] ERROR : Cannot invoke this function because the current
                                  host does not implement it

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[2010-10-22 13:10:58,097] DEBUG : Write-Debug

[2010-10-22 13:10:58,113] ERROR : Cannot invoke this function because the current

host does not implement it

(I think to have all namespaces.)

What the error-message means and what can I do again this?

thanks

Question 2

Now I had found the answer myself:

C#-Code:
    using (ps = PowerShell.Create())
    {
         int a = testSkripte.Count;
         for (int i = 0; i < a; i++)
         {                        
            ps.Runspace.SessionStateProxy.SetVariable("portalpfad", pathExecuteScript);
            ps.Runspace.SessionStateProxy.SetVariable("ScriptLog", (Action<Level, string>)ScriptLog);


   //add following row:
   ps.Runspace.SessionStateProxy.SetVariable("DebugPreference", "Continue");



        ps.AddCommand(System.IO.Path.Combine(pathScripts, testSkripte[i].ToString()));
        ps.Streams.Debug.DataAdded += new EventHandler<DataAddedEventArgs>(Debug_DataAdded);
        ps.Streams.Warning.DataAdded += new EventHandler<DataAddedEventArgs>(Warning_DataAdded);
        ps.Streams.Error.DataAdded += new EventHandler<DataAddedEventArgs>(Error_DataAdded);   
        ps.Invoke();                        
     }

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C#-Code:

using (ps = PowerShell.Create())

{

int a = testSkripte.Count;

for (int i = 0; i < a; i++)

{

ps.Runspace.SessionStateProxy.SetVariable("portalpfad", pathExecuteScript);

ps.Runspace.SessionStateProxy.SetVariable("ScriptLog", (Action)ScriptLog);

//add following row:

ps.Runspace.SessionStateProxy.SetVariable("DebugPreference", "Continue");

ps.AddCommand(System.IO.Path.Combine(pathScripts, testSkripte[i].ToString()));

ps.Streams.Debug.DataAdded += new EventHandler(Debug_DataAdded);

ps.Streams.Warning.DataAdded += new EventHandler(Warning_DataAdded);

ps.Streams.Error.DataAdded += new EventHandler(Error_DataAdded);

ps.Invoke();

}

and this for write-debug:

Powershell-Code:

    usings ... 

    #set variable
    $DebugPreference

    #Now Write (-Debug) without Error
                    Write-Debug "Write-Debug"
                    Write-Warning "Write-Warning"
                    Write-Error "Ende --> Write-Error"

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Powershell-Code:

usings ...

#set variable

$DebugPreference

#Now Write (-Debug) without Error

Write-Debug "Write-Debug"

Write-Warning "Write-Warning"

Write-Error "Ende --> Write-Error"

“Write-Error” (write in Powershell, used in C#) works BUT Write-Debug doesn´t work – Why?

Question:

Answer:

Source:

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