Entity Framework - Expecting non-empty string for 'providerInvariantName' parameter

Question

Ok, this may not be related to EF. I am trying to use the code-first feature and following is what I wrote:-

var modelBuilder = new ModelBuilder();
            v         


        

Answer 1

I had the same error when I uploaded my website to the production server. My connection string had the providerName property set. The cuase of the problem was a connection string in machine.config named LocalSqlServer and a role provider that has used that connection string:

   
   
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So all I had to do was clearing connection strings and role providers before registering mine:

  
    
    
  
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