How can i get the correct date if system date is wrong

Question

Am using DateTime.Now.ToString("MM/dd/yyyy"); to get the current date. If i change the system date the date returned by DateTime.Now() also changes which is vulnerable.

Any one has a solution for this? Thanks

There is no reliable way to do this; consider being on a plane without a WiFi connection, how would you get the time except from the local machine? With "vulnerable", do you mean that you're basing security on the client time? — Joachim Isaksson, Sep 23 '12 at 17:30
Sorry i would like to point out that am connected to network. — Anjana, Sep 23 '12 at 17:35
Still, is it for security purposes you need the time or for user convenience (ie in case they set their clock wrong)? — Joachim Isaksson, Sep 23 '12 at 17:38

score 2 · Answer 1 · edited May 23 '17 at 11:56

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You would have to use a NTP server to retrieve the current date/time in that case. Look at an implementation posted in another question. How to Query an NTP Server using C#?

edited May 23 '17 at 11:56

Community

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answered Sep 23 '12 at 17:29

kfuglsang

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score 1 · Answer 2 · answered Sep 23 '12 at 17:29

When you don't trust the time of the machine you can use an NTP (Network Time Protocol) client call to ask a trusted time server for the correct time.

There are many client codes. For example http://www.dotnet-snippets.com/dns/c-simple-network-time-ntp-protocol-client-SID571.aspx

score 0 · Answer 3 · answered Sep 23 '12 at 20:39

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Hai all thanks for the comments and gateways.

I would like to share one link which helped me.

http://nickstips.wordpress.com/2010/02/12/c-get-nist-internet-time/

answered Sep 23 '12 at 20:39

Anjana

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You should summarize the content of that link, and how it applies to your question. Link only answers are frowned upon. – CodesInChaos Sep 23 '12 at 20:43
The same code has been used. So that i can access the actual date – Anjana Sep 26 '12 at 09:13

How can i get the correct date if system date is wrong

3 Answers3