Change a web config programmatically with C NET

Question

How can I modify   manipulate the web config programmatically with C    Can I use a configuration object  and  if yes  how can I load the web config into a configuration object   I would like to have a full example changing the connection string  After the modification the web config should be written back to the harddisk

User · Answer

Since web config file is xml file you can open web config using xmldocument class   Get the node from that xml file that you want to update and then save xml file     here is URL that explains in more detail how you can update web config file programmatically   http   patelshailesh com index php update-web-config-programmatically  Note  if you make any changes to web config  ASP NET detects that changes and it will reload your application recycle application pool  and effect of that is data kept in Session  Application  and Cache will be lost  assuming session state is InProc and not using a state server or database

User · Answer

This is a method that I use to update AppSettings  works for both web and desktop applications  If you need to edit connectionStrings you can get that value from System Configuration ConnectionStringSettings config   configFile ConnectionStrings ConnectionStrings  YourConnectionStringName    and then set a new value with config ConnectionString    your connection string    Note that if you have any comments in the connectionStrings section in Web Config these will be removed   private void UpdateAppSettings string key  string value        System Configuration Configuration configFile   null      if  System Web HttpContext Current    null                configFile               System Web Configuration WebConfigurationManager OpenWebConfiguration                 else               configFile               ConfigurationManager OpenExeConfiguration ConfigurationUserLevel None             var settings   configFile AppSettings Settings      if  settings key     null                settings Add key  value             else               settings key  Value   value            configFile Save ConfigurationSaveMode Modified       ConfigurationManager RefreshSection configFile AppSettings SectionInformation Name

User · Answer

Here it is some code   var configuration   WebConfigurationManager OpenWebConfiguration       var section    ConnectionStringsSection configuration GetSection  connectionStrings    section ConnectionStrings  MyConnectionString   ConnectionString    Data Source       configuration Save      See more examples in this article  you may need to take a look to impersonation

User · Answer

Configuration config   System Web Configuration WebConfigurationManager OpenWebConfiguration       ConnectionStringsSection section   config GetSection  connectionStrings   as ConnectionStringsSection    section SectionInformation UnprotectSection    section SectionInformation ProtectSection  DataProtectionConfigurationProvider    config Save

[c#] Change a web.config programmatically with C# (.NET)

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