您可以在运行时更改ConnectionString配置值吗？

Question

是否可以在运行时更改app.config中的ConnectionString值？根据MSDN文档,它应该可以作为ConnectionString属性"获取或设置连接字符串".

我的代码看起来像这样:

ConnectionStringSettings mainConnection = ConfigurationManager.ConnectionStrings["mainConnection"];
mainConnection.ConnectionString = "Data Source=SERVER;Initial Catalog=" + NewDatabaseName + ";Integrated Security=True";

我收到的错误是:"未处理的异常:System.Configuration.ConfigurationErrorsException:配置是只读的."

Answer 1

Configuration myConfiguration = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~"); 
    myConfiguration.ConnectionStrings.ConnectionStrings("myDatabaseName").ConnectionString = txtConnectionString.Text; 
    myConfiguration.AppSettings.Settings.Item("myKey").Value = txtmyKey.Text; 
    myConfiguration.Save(); 

参考:http://www.beansoftware.com/ASP.NET-Tutorials/Modify-Web.Config-Run-Time.aspx