里面包括了几个c# 类文件，封装了对excel的导入导出操作，2种加密算法的封装，都只需要简单的调用就可以了。另外ToolBox.cs文件实现2个DataRow的比较。-Inside class contains several c# file, package of excel import export operation, two kinds of encryption algorithm package, only need a simple call on it. Addition ToolBox.cs paper to achieve two DataRow comparison.