看了SHY520写的关于Data Access Application Block的文章,写得不错,忽略了一点就是如何去加密数据库连接字符串,这儿我简单的介绍一下。我们知道,在Enterprise Library1.1中加密连接字符串,需要依赖于Cryptography Application Block。.NET Framework2.0中已经内置了这项功能,通过Configuration命名空间下的一些类来完成,支持两种类型的加密:
DPAPIProtectedConfigurationProvider:使用Windows Data Protection API (DPAPI)
RsaProtectedConfigurationProvider:使用RSA算法
下面来看一下具体的实现方法,假设已经有这样的一个配置文件:
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1.添加对System.Configuration.dll的引用
2.在Program.cs中引入命名空间
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3.编写相关的代码:
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该方法的调用放在程序的主程序的入口点:
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运行程序后,打开配置文件可以看到,连接字符串已经变成密文了。最后注意一点:加密的字符串在被加载到内存的时候解密。