试图获得一个为Null 的Variant变量的值。你只能获得包含有效值的Variant 变量的值。Null 是一个 Variant 一个用来指示一个数据项不包含任何有效数据的子类型。
要纠正该错误
请参阅
IsNull 函数 | VBScript 词表
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Welcome to the Community Site for the ASP.NET technology preview code-named “Atlas”
ASP.NET “Atlas” is a package of new Web development technologies that integrates an extensive set of client script libraries with the rich, server-based development platform of ASP.NET 2.0. “Atlas” enables you to develop Web applications that can update data on a Web page by making direct calls to a Web server — without needing to round trip the page. With “Atlas”, you can take advantage of the best of ASP.NET and server-side code while doing much of the work in the browser, enabling a richer user experience.