Reading a key from the Web Config using ConfigurationManager

Question

I am trying to read the keys from the Web config file in a different layer than the web layer  Same solution   Here is what I am trying   string userName   System Configuration ConfigurationManager AppSettings  PFUserName    string password   System Configuration ConfigurationManager AppSettings  PFPassWord      And here is my appSettings in the Web config file    lt configuration gt              lt appSettings gt         lt add key  PFUserName  value  myusername   gt         lt add key  PFPassWord  value  mypassword   gt      lt  appSettings gt           lt  configuration gt    When I debug the code username and password are just null  so it is not getting the value of the keys   What am I doing wrong to read these values

User · Answer

var url   ConfigurationManager AppSettings  ServiceProviderUrl

User · Answer

Also you can try this line to get string value from app config file   var strName  ConfigurationManager AppSettings  stringName

User · Answer

This issue happens if this project is being used by another project  Make sure you copy the app setting keys to the parent project s app config or web config

User · Answer

Try using the WebConfigurationManager class instead  For example   string userName   WebConfigurationManager AppSettings  PFUserName

User · Answer

with assuming below setting in  config file    lt configuration gt      lt appSettings gt        lt add key  PFUserName  value  myusername   gt        lt add key  PFPassWord  value  mypassword   gt      lt  appSettings gt    lt  configuration gt    try this   public class myController   Controller       NameValueCollection myKeys   ConfigurationManager AppSettings       public void MyMethod                 var myUsername   myKeys  PFUserName            var myPassword   myKeys  PFPassWord

User · Answer

I found this solution to be quite helpful  It uses C  4 0 DynamicObject to wrap the ConfigurationManager  So instead of accessing values like this    WebConfigurationManager AppSettings  PFUserName     you access them as a property   dynamic appSettings   new AppSettingsWrapper    Console WriteLine appSettings PFUserName       EDIT  Adding code snippet in case link becomes stale   public class AppSettingsWrapper   DynamicObject        private NameValueCollection  items       public AppSettingsWrapper                  items   ConfigurationManager AppSettings              public override bool TryGetMember GetMemberBinder binder  out object result                result    items binder Name           return result    null

User · Answer

Full Path for it is   System Configuration ConfigurationManager AppSettings  KeyName

User · Answer

If the caller is another project  you should write the config in caller project not the called one

User · Answer

Sorry I ve not tested this but I think it s done like this   var filemap   new System Configuration ExeConfigurationFileMap                System Configuration Configuration config    System Configuration ConfigurationManager OpenMappedExeConfiguration filemap  System Configuration ConfigurationUserLevel None      usage  config AppSettings  xxx

User · Answer

There will be two Web config files  I think you may have confused with those two files   Check this image     In this image you can see two Web config files  You should add your constants to the one which is in the project folder not in the views folder  Hope this may help you

[c#] Reading a key from the Web.Config using ConfigurationManager

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