Rob Matthews crossed from the right to Dudfield, who was just inside the penalty area. Dudfield hooked the ball over with his right-foot, and the shot looped over the Oxford 'keeper and into the net in front of the South Stand.
That goal received 21.5% of the votes, just 2 more than Gary Alexander's 30-yard wonderstrike at Rushden & Diamonds in October.
Third place went to David Lee for his free kick against York at Boothferry Park in September.
Michael Reddy's goal against Halifax - with a lot of the credit going to Theo Whitmore for the assist - came fourth with almost 13% of the votes.
Whitmore himself was just one vote behind in fifth place for his effort against Cheltenham in November.
Alexander's goal against Rushden & Diamonds in February, followed by his strike against Rochdale came in 6th and 7th respectively, while nobody voted for Dudfield's goal at Northwich Victoria which obviously came last.
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