在运行时添加 ConnectionString App.Config 并显示而无需重新加载应用程序？

Question

我们有一个内部工具，我们需要能够以编程方式添加连接字符串，然后重新加载该连接字符串，而无需重新加载应用程序。

我有点困惑，浪费了 2 天时间，准备放弃，我做了以下事情

       var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
        int initialCount = ConfigurationManager.ConnectionStrings.Count;
        string connStringName = "TEST";
        string serverName="Servedr";
        string databaseName = "MyDb";
        string userId="MyUseId";
        string password="MyPassword";
        var connectionStringBuilder = new SqlConnectionStringBuilder
                                          {
                                              DataSource = serverName,
                                              InitialCatalog = databaseName,
                                              UserID = userId,
                                              Password = password
                                          };


        var csSetting = new ConnectionStringSettings(connStringName, connectionStringBuilder.ConnectionString, "System.Data.SqlClient");
        var csSection = config.ConnectionStrings;
        csSection.ConnectionStrings.Add(csSetting);
        config.Save(ConfigurationSaveMode.Modified, true);
        ConfigurationManager.RefreshSection("ConnectionStrings");

        int finalCount = ConfigurationManager.ConnectionStrings.Count;

这应该行得通吧？RefreshSection 等...有什么建议吗？无需重新启动的解决方法？

谢谢

Answer 1

如何使用 Reflect 方法，如以下代码片段：

        var csSetting = new ConnectionStringSettings(connStringName, connectionStringBuilder.ConnectionString, "System.Data.SqlClient");

        var readonlyField = typeof(ConfigurationElementCollection).GetField("bReadOnly", BindingFlags.NonPublic | BindingFlags.Instance);
        readonlyField.SetValue(ConfigurationManager.ConnectionStrings, false);

        var baseAddMethod = typeof(ConfigurationElementCollection).GetMethod("BaseAdd",
            BindingFlags.Instance | BindingFlags.NonPublic, null, new Type[] { typeof(ConfigurationElement) }, null);
        baseAddMethod.Invoke(ConfigurationManager.ConnectionStrings, new object[] { csSetting });

        readonlyField.SetValue(ConfigurationManager.ConnectionStrings, true);

        int finalCount = ConfigurationManager.ConnectionStrings.Count;