ERROR:
Object reference not set to an instance of an object.
I'm trying to create a DLL that can get the Entrypoint application name that is written in Powershell.
The layout is very simple:
In Powershell I add the line
Add-Type -Path ('C:\Users\Public\PS\DLL\get_value.dll')
then I create the object
$value = New-Object PS_get_value.Stack
and call the C# method
$rtn = $value.Get_stack()
If the Get_stack() method returns a basic string like "Test" it works fine….
BUT if I try to use the .net Assembly.GetEntryAssembly().Location (which should return the full path to the calling (parent) app), I get the error above.
I am trying to get the full path (or at least the filename) of the application script that is running in Powershell. I plan on using that value to validate that the program (PS script) is the one that should be running. If there is a different way for the C# code to get it that's fine. BTW if I run a normal program it works. I do know that there is something about managed code base, I'm not sure what that is.
Thanks for any help or direction your can give.
Code Example:
PS:
Add-Type -Path ('C:\Users\Public\PS\DLL\get_value.dll')
$addNum = New-Object PS_get_value.Stack
$_rtnKey = $addNum.Get_stack()
Write-Host "RTNed Key Version 2: $_rtnKey"
C# (the DLL):
using System;
using System.IO;
using System.Diagnostics;
using System.Reflection;
namespace PS_get_value
{
public class Stack{
public string Get_stack()
{
string _test_a = g_stack();
return _test_a;
}
public string g_stack()
{
return System.Reflection.Assembly.GetEntryAssembly().Location;
}
}
}
