OSLO, April 28 (Reuters) - DNB, Norway's largest bank, posted better-than-expected first-quarter earnings, reflecting a strong Norwegian economy and a high level of activity in the corporate market, the company said on Thursday.

Net profit rose to 7.56 billion crowns ($806.8 million) for the January-March quarter from 5.89 billion a year earlier, beating the 6.10 billion expected by analysts in a poll compiled by the bank. ($1 = 9.3707 Norwegian crowns) (Reporting by Gwladys Fouche, editing by Terje Solsvik)