CScript when called as a process in c# only opens 32 bit version

问题

I am running a VBS file that needs to be executed on the 64-bit version of cscript. On the command line, when I call cscript, it opens the 64-bit version located at C:\Windows\System32\cscript.exe and the VBS file works fine.

However, I'd like to call this VBS file through C# as a Process. Starting the process with the FileName as cscript does open cscript, but only opens the 32-bit version, located at C:\Windows\SysWoW64\cscript.exe.

Even when I set the FileName to specifically point to the 64-bit version of cscript, it only loads the 32-bit version.

How can I force the process to open the 64-bit version of cscript?

Here is my code, including the 64-bit version file path explained above:

string location = @"C:\location";
Process process = new Process();
process.StartInfo.FileName = @"C:\Windows\System32\cscript.exe";
process.StartInfo.WorkingDirectory = location+@"\VBS\";
process.StartInfo.Arguments = "scriptName.vbs";
process.Start();

回答1:

Depending on your requirements there is another solution.

Some background: When you run a 64-Bit application and try to start cscript.exe then you call C:\Windows\System32\cscript.exe (or more general %windir%\System32\cscript.exe)

However, when you run a 32-Bit application then each call to %windir%\System32\ is automatically redirected to %windir%\SysWOW64\. In this directory you will find all your 32-Bit DLL's. This redirection is done by Windows internally and your application does not recognize any difference.

In order to access %windir%\System32\ from a 32-Bit application you can use %windir%\Sysnative\, i.e. process.StartInfo.FileName = @"C:\Windows\Sysnative\cscript.exe"; should work even if you compile your application as 32-Bit.

Note, folder %windir%\Sysnative\ does not exist in 64-Bit environment, thus you may check your run-environment by Environment.Is64BitProcess, so

if Environment.Is64BitProcess {
   process.StartInfo.FileName = @"C:\Windows\System32\cscript.exe";
} else {
   process.StartInfo.FileName = @"C:\Windows\Sysnative\cscript.exe";
}

回答2:

A simple answer has arose:

In my C# application I am creating, in Visual Studio (2017) had selected my Platform target to Prefer 32-bit, which should perhaps better be called as "force 32-bit".

By unselecting this option, my process ran as 64-bit, both by specifying the 64-bit path as the code above, but also by just running the cscript by name.

process.StartInfo.FileName = "cscript";

Toggle this option inside Properties > Build > Prefer 32-bit

来源：https://stackoverflow.com/questions/46855084/cscript-when-called-as-a-process-in-c-sharp-only-opens-32-bit-version

标签

vbscript

process

64-bit