provide alternative packages for mvc4

[davidlaym]

postal has a hard reference on mvc3 (assembly references) which makes impossible to add filesystemrazorengie or resourcerazorviewEngine in a aspnet mvc 4 app.

My specific use case is i'm running a light background job in a mvc4 app (using web-backgrounder) that sends emails with a resourcerazorviewEngine, but failing given that the ViewEngineCollection checks that ResourceRazorViewEngine inherits from IViewEngine from asp.net.mvc 4.0.0.0 which is not.

I propose to make a postal.core (no references to mvc) and postal.mvc3 + postal.mvc4

[andrewdavey]

Can you try adding binding redirects to your web.config?

  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers"
             publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0" newVersion="2.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc"
             publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="4.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages"
             publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0" newVersion="2.0.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

[vkornov]

Hey, just so you know I've just wasted an hour of my life trying to fix a "must derive from WebViewPage error" in a MVC 4.0 project. Apparently, it checks for MVC 3.0 version of the class. Added the binding redirects, the issue went away.

[andrewdavey]

Postal v0.9.0 references MVC with SpecificVersion=False set. So that should alleviate issues like this.