首先添加引用: using System.Web.Configuration;

加密操作如下:
private void ProtectSection(string sectionName, string provider)
    {
        Configuration config =
            WebConfigurationManager.
                OpenWebConfiguration(Request.ApplicationPath);

        ConfigurationSection section = config.GetSection(sectionName);

        if (section != null && !section.SectionInformation.IsProtected)
        {
            section.SectionInformation.ProtectSection(provider);
            config.Save();
        }
    }

解密操作如下:
 private void UnProtectSection(string sectionName)
    {
        Configuration config =
            WebConfigurationManager.
                OpenWebConfiguration(Request.ApplicationPath);

        ConfigurationSection section = config.GetSection(sectionName);

        if (section != null && section.SectionInformation.IsProtected)
        {
            section.SectionInformation.UnprotectSection();
            config.Save();
        }
    }
实践:
加密前的配置文件:


   
 
 
 
   
       
 

加密后的配置文件:


   
 
  
   
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