Read Variable from Web Config

Question

How can I add and read the value from web config file

User · Answer

Given the following web config    lt appSettings gt        lt add key  ClientId  value  127605460617602   gt        lt add key  RedirectUrl  value  http   localhost 49548 Redirect aspx   gt   lt  appSettings gt    Example usage   using System Configuration   string clientId   ConfigurationManager AppSettings  ClientId    string redirectUrl   ConfigurationManager AppSettings  RedirectUrl

User · Answer

Ryan Farley has a great post about this in his blog  including all the reasons why not to write back into web config files   Writing to Your  NET Application s Config File

User · Answer

If you want the basics  you can access the keys via   string myKey   System Configuration ConfigurationManager AppSettings  myKey   ToString    string imageFolder   System Configuration ConfigurationManager AppSettings  imageFolder   ToString      To access my web config keys I always make a static class in my application  It means I can access them wherever I require and I m not using the strings all over my application  if it changes in the web config I d have to go through all the occurrences changing them   Here s a sample   using System Configuration   public static class AppSettingsGet           public static string myKey               get   return ConfigurationManager AppSettings  myKey   ToString                 public static string imageFolder               get   return ConfigurationManager AppSettings  imageFolder   ToString                    I also get my connection string from here     public static string ConnectionString              get   return ConfigurationManager ConnectionStrings  ConnectionString   ConnectionString

User · Answer

I would suggest you to don t modify web config from your  because every time when change  it will restart your application   However you can read web config using System Configuration ConfigurationManager AppSettings

User · Answer

I am siteConfiguration class for calling all my appSetting like this way  I share it if it will help anyone   add the following code at the  web config    lt configuration gt      lt configSections gt        lt  -- some stuff omitted here -- gt      lt  configSections gt      lt appSettings gt         lt add key  appKeyString  value  abc    gt         lt add key  appKeyInt  value  123    gt        lt  appSettings gt   lt  configuration gt    Now you can define a class for getting all your appSetting value  like this    using System   using System Configuration  namespace Configuration      public static class SiteConfigurationReader            public static String appKeyString    for string type value                  get                        return ConfigurationManager AppSettings Get  appKeyString                              public static Int32 appKeyInt    to get integer value                  get                        return ConfigurationManager AppSettings Get  appKeyInt   ToInteger true                                you can also get the app setting by passing the key       public static Int32 GetAppSettingsInteger string keyName                    try                         return Convert ToInt32 ConfigurationManager AppSettings Get keyName                      catch                       return 0                             Now add the reference of previous class and to access a key call like bellow  string appKeyStringVal  SiteConfigurationReader appKeyString  int appKeyIntVal  SiteConfigurationReader appKeyInt  int appKeyStringByPassingKey   SiteConfigurationReader GetAppSettingsInteger  appKeyInt

User · Answer

Assuming the key is contained inside the  lt appSettings gt  node   ConfigurationSettings AppSettings  theKey      As for  writing  - put simply  dont   The web config is not designed for that  if you re going to be changing a value constantly  put it in a static helper class

[c#] Read Variable from Web.Config

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