How to update app.config file

Question

Hello
i am working on windows application in C#.now i want change connection string in app.confing through programitically using following code

var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            var connectionStringsSection = (ConnectionStringsSection)config.GetSection("connectionStrings");
            connectionStringsSection.ConnectionStrings["AdminDBConn"].ConnectionString = "Data Source=" + serverName + ";Initial Catalog=" + DbName + ";UID=" + userName + ";password=" + Password + "";
            config.Save();
            ConfigurationManager.RefreshSection("connectionStrings");

connection string save but when application is close then and again open then he picked up old connection string mean app.config does not update permantelly.

Abhay Shanker · Answer

private const string ProviderKey = NameOfProviderGoesHere; private static void AddDisableFlagToConfig(string value) { Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); if (ConfigurationManager.AppSettings[ProviderKey] == null) { config.AppSettings.Settings.Add(ProviderKey value); } else { config.AppSettings.Settings[ProviderKey].Value = value; } config.Save(); ConfigurationManager.RefreshSection(appSettings); }can also check below links http://www.codeproject.com/Articles/14744/Read-Write-App-Config-File-with-NET

Jignesh Trivedi · Answer

hi Please refer below link http://www.c-sharpcorner.com/forums/thread/82763/how-do-i-change-app-config.aspx http://www.c-sharpcorner.com/Blogs/8870/ hope this will help you.

Munesh Sharma · Answer

you go on this link and this link