How to use a App.config file in WPF applications?

Question

I created an App.config file in my WPF application:

<?xml version="1.0" encoding="utf-8" ?> <configuration>   <appsettings>     <add key="xmlDataDirectory" value="c:\testdata"/>   </appsettings> </configuration> 

Then I try to read the value out with this:

string xmlDataDirectory = ConfigurationSettings.AppSettings.Get("xmlDataDirectory"); 

But it says this is obsolete and that I should use ConfigurationManager which I can't find, even searching in the class view.

Does anyone know how to use config files like this in WPF?

Answer 1

You have to reference the System.Configuration assembly which is in GAC.

Use of ConfigurationManager is not WPF-specific: it is the privileged way to access configuration information for any type of application.

Please see Microsoft Docs - ConfigurationManager Class for further info.

Answer 2

In my case, I followed the steps below.

App.config

<configuration>      <startup>         <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />   </startup>   <appSettings>    <add key="POCPublishSubscribeQueueName" value="FormatName:Direct=OS:localhost\Private$\POCPublishSubscribe"/>  </appSettings>  </configuration> 

Added System.Configuartion to my project.

Added using System.Configuration statement in file at top.

Then used this statement:

string queuePath = ConfigurationManager.AppSettings["POCPublishSubscribeQueueName"].ToString();