Shulou(Shulou.com)06/01 Report--

During the run of the program, the configuration file is loaded only once, so it must be reread after dynamic changes to take effect. Here is the code section.

1. Dynamically modify the configuration file

/ / through Xml (using System.xml; required)

XmlDocument doc = new XmlDocument ()

Doc.Load (Application.ExecutablePath + ".config")

/ / XmlNode node = doc.SelectSingleNode (@ "/ / add [@ key='" + key + "']"); / / locate to the add node

XmlNode node = doc.SelectSingleNode (@ "/ / add [@ name='dbConnStr']"); / / navigate to add node

XmlElement element = (XmlElement) node

Element.SetAttribute ("connectionString", "Data Source=.;Initial Catalog="; Integrated Security=True"); / / assignment

Doc.Save (Application.ExecutablePath + ".config")

ConfigurationManager.RefreshSection ("connectionStrings"); / / refresh the node

2. Re-read the configuration file node every time you operate the database

String connStr = ConfigurationManager.ConnectionStrings ["dbConnStr"] .ConnectionString

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