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ASP.NET²Ù×÷web.config

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      ·½·¨Ò»£¬ÀûÓÃWebConfigurationManager£¬ÐèÒªÒýÓÃSystem.Web.Configuration.WebConfigurationManager£»
     Ìí¼ÓÏ
     Configuration config = WebConfigurationManager.OpenWebConfiguration(null);
     AppSettingsSection app = config.AppSettings;
    app.Settings.Add("key", "valueadd");
    config.Save(ConfigurationSaveMode.Modified);
  
     ÐÞ¸ÄÏ
     Configuration config = WebConfigurationManager.OpenWebConfiguration(null);
     AppSettingsSection app = config.AppSettings;
     app.Settings["key"].Value = "valuemodify";
     config.Save(ConfigurationSaveMode.Modified);
     ɾ³ýÏ
     Configuration config = WebConfigurationManager.OpenWebConfiguration(null);
     AppSettingsSection app = config.AppSettings;
     app.Settings.Remove("key");
     config.Save(ConfigurationSaveMode.Modified);
     ÐÞ¸ÄÁ¬½ÓÏ
      Configuration config = WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath);
ConnectionStringsSection conSection = (ConnectionStringsSection)config.GetSection("connectionStrings");
conSection.ConnectionStrings[Request["type"].ToString()].ConnectionString = Request["connstr"];
config.Save(ConfigurationSaveMode.Modified);
 XmlDocument xmldoc = new XmlDocument();
            string filename = Common.FilePath("../web.config");
    &nbs


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