how to set "automatic dns" using wmi?

[Krzysztof Gorgolewski]

good evening out there, i'm working on a routine (using c# + wmi) that is able to change my network configuration e.g. dhcp<->static, different ip/gateway/subnet addresses etc (just like the build-in windows tcp/ip network configuration). everything works fine, but i can not find any way of switching between static defined dns servers and automatic leased dns servers (which i receive automatic from my router or equivalent). i mean, what is the counter part for "EnableDNS", like "EnableDHCP" is for "EnableStatic"? i can not find it in the windows api... greetings criss

[Dave Kreskowiak]

There isn't one. DNS will get set back to DHCP if you enable DHCP on the IP address. You can't have DHCP DNS without a DHCP enabled IP pickup.

Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
     2006, 2007

[Krzysztof Gorgolewski]

hi dave, so that means, if i call EnableDHCP all entries in my dns list will be deleted and it becomes "automatic"? hm, but that's not happening somehow. i can not get rid of any static dns settings. any ideas? criss

[Krzysztof Gorgolewski]

i found the solution... before calling EnableDHCP, i have to clear my DNS list by assigning an empty array to SetDNSServerSearchOrder like

...
newdns["DNSServerSearchOrder"] = new string[] { };
mo.InvokeMethod("SetDNSServerSearchOrder", newdns, null);
mo.InvokeMethod("EnableDHCP", null, null);
...

where "mo" is the ManagementObject of my networkcard. regards, criss