I can't update my edmx since the Entity Data Model Designer is unable to open it

Question

Hi everyone and thanks for taking the time to see my question.

I'm running VS 2017 with Entity Framework 6 and asp.net MVC and have to add some field to one of my Entities.

I added the corresponding fields in the database, but when I open the edmx file nothing shows apart the message "Entity Data Model Designer is unable to open this file." and it proposes me to open it in XML editor, but I have not the "Update model from Database" option when right clicking on the XML file.

Is anyone knows what causes this ?

Answer 1

I finally came accross my problem. I searched for like 5 hours how to make a new database connection and realised I had no option with MySQL connection. So I found this thread and it led me on the good path. After, I found this cause I weren't able to install MySQL for Visual Studio. I followed these two steps:

• Download and install the MySQL for Visual Studio component without the MySQL installer here

  • Download and install the "Connector/NET" V6.9.10. "mysql-connector-net-6.9.10.msi" here

After that I started Visual Studio and the Design Surface showed up well, and I was directly able to Update my model from the Database :D

EDIT: I just saw that MySQL for visual studio wasn't installed properly. In fact, it rolls back up at the end of the installation, and I have no Mysql Database option on the "new Database connection" window :/ Does somebody know what this is about ?

EDIT SOLUTION Turns out that I had installed Visual Studio on an other disk than C: and mysql for visual studio Installer didn't like that. Now I see "MySql Database" in the list when adding a new connection.