| 數(shù)據(jù)訪問(wèn)層的好壞直接影響到應(yīng)用程序性能的發(fā)揮,本文從研究基于ADO.NET的數(shù)據(jù)訪問(wèn)層設(shè)計(jì)出發(fā),首先分別分析了,Duwamish和PetShop數(shù)據(jù)訪問(wèn)層的設(shè)計(jì)和實(shí)現(xiàn),并在此基礎(chǔ)上比較Duwamish和PetShop兩個(gè)應(yīng)用程序的數(shù)據(jù)訪問(wèn)層數(shù)據(jù)訪問(wèn)模式和數(shù)據(jù)訪問(wèn)策略,得出它們各自的優(yōu)缺點(diǎn)和應(yīng)用環(huán)境。 |
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