The web service URL is stored in a Settings.settings file.
This in turn creates an app.config file.
I use myClassLibrary in a web project, and I ran into the problem that the default URL for the web service that I had specified in Settings.settings needed to be different when my web project was in our test environment. So I wanted to be able to override the Settings.settings value with, say, a value in my web.config.
This is how you do it:
The URL is defined as a value with Scope set to "Application" and a GenerateDefaultValueInCode property set to "TRUE".
This provides a default value when myClassLibrary is run in a non-web context with no override in the app.config file.
The URL is set in an applicationSettings block to override the default value when the class library is used in a non-web context.
<applicationSettings> <myClassLibrary.Settings> <setting name="myWebServiceUrl" serializeAs="String"> <value>http://whatever.com/myService</value> </setting> </myClassLibrary.Settings1> </applicationSettings>
Here is where we do the override for use of the class library in a web context.
Firstly we have to define a configuration block that will match the one in app.config:
<configSections> <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup" > <section name="myClassLibrary.Settings" type="System.Configuration.ClientSettingsSection" /> </sectionGroup> </configSections>
Then we just implement that block with our override value.
<applicationSettings> <myClassLibrary.Settings> <setting name="myWebServiceUrl" serializeAs="String"> <value>http://another.com/myAlternativeService</value> </setting> </myClassLibrary.Settings> </applicationSettings>