在运行时更新app.config system.net设置

我需要在运行时更新.Net exe app.config文件的system.net SectionGroup中的设置。 我没有在运行时对原始配置文件的写访问权限（我正在开发一个.Net dll加载项，它由我无法控制的应用程序提供的exe托管）所以我希望保存一份副本的文件，并在运行时用修改后的版本替换exe中的配置。 我尝试过以下但是没有用。 有什么建议？

Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); NetSectionGroup netSectionGroup = config.GetSectionGroup("system.net") as NetSectionGroup; netSectionGroup.Settings.HttpWebRequest.UseUnsafeHeaderParsing = true; config.SaveAs(@"C:\ProgramData\test.config", ConfigurationSaveMode.Full); AppDomain.CurrentDomain.SetData("APP_CONFIG_FILE", @"C:\ProgramData\test.config"); 

Answer 1

我无法理解您的问题，如果由于您自己的设计实现而无法访问app.config文件，或者您只是无法保存配置文件，那么这里有一段代码可以让您在运行时修改并保存配置文件中的appSettings部分：

 Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); KeyValueConfigurationCollection settings = config.AppSettings.Settings; // update SaveBeforeExit settings[-keyname-].Value = "newkeyvalue"; ... //save the file config.Save(ConfigurationSaveMode.Modified); //relaod the section you modified ConfigurationManager.RefreshSection(config.AppSettings.SectionInformation.Name); 

PS代码不会保存您在解决方案编辑器中看到的app.config文件，它将在操作forlder中修改“program_name.exe.config”文件。

Answer 2

使用System.Configuration;

  public void save_new_connection() { string ConStrng = ConfigurationManager.ConnectionStrings.ToString(); ConnectionStringSettings conSetting = new ConnectionStringSettings(); conSetting.ConnectionString="server=localho;UserId=root;password=mypass;database=night_anglecourier"; conSetting.Name = "courier.Properties.Settings.night_anglecourierConnectionString"; conSetting.ProviderName = "MySql.Data.MySqlClient"; System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); ConnectionStringsSection conSettings = (ConnectionStringsSection)config.GetSection("connectionStrings"); conSettings.ConnectionStrings.Remove(conSetting); conSettings.ConnectionStrings.Add(conSetting); config.Save(ConfigurationSaveMode.Modified); ConfigurationManager.RefreshSection(config.AppSettings.SectionInformation.Name); } 

Answer 3

使用此代码我已经更改了配置文件的应用程序设置中的连接字符串…希望这可能对您有所帮助。

 string ConStrng = ConfigurationSettings.AppSettings["ConnectionString"]; string sss = "Data Source="; string xxx = ";Initial Catalog=AlfalahScholarship;Integrated Security=True"; //ConfigurationSettings.AppSetting; System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); //Get the appSettings section. AppSettingsSection appSettings = (AppSettingsSection)config.GetSection("appSettings"); appSettings.Settings.Remove("ConnectionString"); appSettings.Settings.Add("ConnectionString", sss + txtServerName.Text + xxx); config.Save(ConfigurationSaveMode.Modified); ConfigurationManager.RefreshSection(config.AppSettings.SectionInformation.Name);