C#数据库连接字符串加密方法

1、在启动项目中创建App.config文件，App.config文件内容为 <?xml version="1.0" encoding="utf-8" ?> <configuration> <configSections> <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" /> </configSections> <dataConfiguration defaultDatabase="connString" /> <connectionStrings> <add name="connString" connectionString="server=www.db4free.net;user id=kai76941058;password=chenkai149;database=kai76941058;" providerName="System.Data.SqlClient" /> </connectionStrings> </configuration> 2、在启动项目的Program.cs文件中添加方法如下： static void EncryptConfiguration() { // 使用什么类型的加密 string provider = "RsaProtectedConfigurationProvider"; Configuration config = null; config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); // 加密连接字符串 ConfigurationSection section = config.ConnectionStrings; if ((section.SectionInformation.IsProtected == false) && (section.ElementInformation.IsLocked == false)) { section.SectionInformation.ProtectSection(provider); section.SectionInformation.ForceSave = true; config.Save(ConfigurationSaveMode.Full); } } 3、在启动项目Program.cs文件中的主程序入口点中调用 EncryptConfiguration（）方法如下： /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { EncryptConfiguration(); Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Mian()); } 4、在DBHelper.cs文件中代码改为如下： namespace CKyun_DAL { public class DBHelper { public static string connString = ConfigurationManager.ConnectionStrings["connString"].ToString(); } }