Question

I wan to add some DNS records in c# program via a bat file so I have written these lines in bat file:

    set servername=%1
set siteaddress=%2


"C:\Windows\System32\dnscmd.exe" %servername% /zoneadd %siteaddress% /primary /file  %siteaddress%.dns

and I have written these lines in C#:

Process p = new Process();
                    p.StartInfo.UseShellExecute = false;
                    p.StartInfo.WorkingDirectory = Application.StartupPath;
                    p.StartInfo.FileName = General.DnsBatPath;
                    p.StartInfo.Arguments = string.Format("{0} {1}", General.DnsServerName, txtSiteAddress.Text);
                    p.Start();
                    p.WaitForExit();

I get this error “dnscmd.exe is not recognized as internal or external command…” but when I run bat file manually (outside of C#) all things are OK.

I changed my C# code to check what happened

Process.Start(@"C:\Windows\System32\dnscmd.exe");

I still get “not recognized …” error.but I can see dnscmd.exe in “C:\Windows\System32”.
I changed my C# code again to check another thing:

Process.Start(@"C:\Windows\System32\cmd.exe");

and after that CMD windows will be opened???
any idea?

Answer 1

In answer to your second question, you can always check the environmental variable PROCESSOR_ARCHITECTURE to see if it contains the number 64.

set servername=%1
set siteaddress=%2

if "%PROCESSOR_ARCHITECTURE%" equ "%PROCESSOR_ARCHITECTURE:64=%" (
  REM 32bit
  "C:\Windows\System32\dnscmd.exe" %servername% /zoneadd %siteaddress% /primary /file  %siteaddress%.dns
) else (
  REM 64bit
  "%windir%\Sysnative\dnscmd.exe" %servername% /zoneadd %siteaddress% /primary /file  %siteaddress%.dns
)

---

Possibly a more reliable method is to get it from the registry:

set servername=%1
set siteaddress=%2

for /f "tokens=3" %%x in ('reg Query HKLM\Hardware\Description\System\CentralProcessor\0 /v Identifier') do (
  set arch=%%x
)
if %!arch:~-2!%==64 (
  set dnsPath=%windir%\Sysnative
) else (
  SET dnsPath=C:\Windows\System32
)
"%dnsPath%\dnscmd.exe" %servername% /zoneadd %siteaddress% /primary /file  %siteaddress%.dns