MSSQL Error 'The underlying provider failed on Open'

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时光取名叫无心
时光取名叫无心 2020-11-22 09:51

I was using an .mdf for connecting to a database and entityClient. Now I want to change the connection string so that there will be no

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  •  情书的邮戳
    2020-11-22 10:25

    If you happen to get this error on an ASP.NET web application, in addition to other things mentioned check the following:

    1. Database User Security Permissions (which users are allowed access to your database.
    2. Check your application pool in IIS and make sure it's the correct one that is allowed access to your database.

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