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用ASP技术开发Web数据库应用时，如果需要在客户端上进行大数据量输入，采用传统的对表单中输入对象进行逐一验证、控制的程序设计方式，会造成程序复杂、重复工作量大。针对这种情况，本文提出了一种专门解决大数据量输入问题的“模块化”编程方法。该方法通用性强、使用方便，可提高ASP程序的质量和开发效率。 相似文献
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A range of ferrocenyl sulfides are synthesized and screened. Among them 1-α-methysulphoferrocenyl ethyl acetate and 1-α-methysulphoferrocenyl alcohol are found to be unexpected catalysts, which is first reported mediating in sulfur ylide epoxidation reactions, furnishing a novel approach for highly stereoselective synthesis of oxiranes with 98%-100% trans-isomer. The protocol also has excellent yield, convenient workup and recycled starting material. The reason of high trars-selectivity is due to the bulky ferrocenyl sulfide group, which stabilizes the intermediates and determines the trans priority. A possible catalytic mechanism is also proposed. 相似文献
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