判断客户端是否安装framework
安装 .NET Framework 3.5 后,MSI 会将“.NET CLR”和版本号添加到 UserAgent 字符串中。下面的示例演示一个嵌入到简单的 HTML 页的脚本。该脚本搜索 UserAgent 字符串以确定是否已安装 .NET Framework 3.5,并在搜索结果中显示状态消息。
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在安装 .NET Framework 3.5 时,客户端计算机配置了用于 Firefox 2.0+ 的插件,该插件使 Firefox 2.0+ 可以承载 XAML 浏览器应用程序 (XBAP)。下面的示例脚本在检查“Windows Presentation Foundation”插件之前,会检查脚本是否由 Firefox 2.0+ 承载。无论结果如何,该脚本都会显示相应的状态消息。
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