People can tell the difference between desperation and an earnest attempt to create a relationship. Networking is about cultivating relationships.

"When someone comes to me for advice on how to build a network because they need a job now, I tell them it's useless. People can tell the difference between desperation and an earnest attempt to create a relationship. (Keith Ferrazzi, author of the Never eat alone
Networking is not about making superficial contacts just to meet your immediate need. It's about cultivating relationships. (William Arruda and Kirsten Dixson, Career Distinction, p174)