Disable the default constructor on a Database-First workflow

Question

How can I prevent the use of the parameterless constructor of the generated DbContext?

var dcx = new DataEntities();

The default constructor is generated by the T4 template, and I thus cannot override it in a partial class. I would prefer it not compile, but a runtime error would also be good.

Answer 1

You can modify the template to provide the constructor you want.

• Open the *.Context.tt file
• Go to line ~59

• Change this code.

  public <#=code.Escape(container)#>()
      : base("name=<#=container.Name#>")
  

• Into the default constructor you want, for example.

  public <#=code.Escape(container)#>(string nameOrConnectionString)
      : base(nameOrConnectionString)
  

• Save