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Cannot attach the file "MvcMovie. mdf" as database "aspnet-MvcMovie ",

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Cannot attach the file "MvcMovie. mdf" as database "aspnet-MvcMovie ",

Today, when I learned how to get started with asp.net mvc5 on Microsoft's official website, I encountered a difficult problem. I followed the tutorial step by step, but I encountered a problem that I felt inexplicable, this is not mentioned in the tutorial,

In the section "Add new fields", follow the tutorial to "update-database", the package management console reports an error "Cannot attach the file" MvcMovie. mdf "as database" aspnet-MvcMovie ", after a long time, I did not understand why this error was reported, and then I started the web. "Initial Catalog = aspnet-MvcMovie;" in the Link string of the config file can run normally after it is deleted.

 

 

 

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