ASP.NET MVC Type is not resolved for member MySql.Data.MySqlClient.MySqlException,MySql.Data

Question

I added a new property to my model of an ASP.NET MVC 5.2 application with MySQL database, and now I'd like to add a database migration for this by using this command:

Add-Migration RegisterPropertyAdded

But, I get an exception:

Type is not resolved for member MySql.Data.MySqlClient.MySqlException,MySql.Data, Version=6.9.7.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d

It seems that MySQL wants to throw an exception but can't find the exception class for reasons I don't understand. I installed the following NuGet packages in the project:

EntityFramework Version 6.1.3

MySql.Data Version 6.9.7

MySql.Data.Entities, Version 6.8.3.0

MySql.Data.Entity Version 6.9.7

In the model, the class MySql.Data.MySqlClient.MySqlException is shown, so it seems like the class exists and I can't find any information that additional packages are required for the exception class.

Please show the class and property that you have added.

Amogh
– Amogh

2015-07-18 22:34:45 +00:00
Commented Jul 18, 2015 at 22:34 — Amogh
– Amogh, Commented Jul 18, 2015 at 22:34

olsh · Accepted Answer · 2017-03-14 08:48:30Z

4

In order to see this exception you have to update MySQL Connector/Net
Also make sure that MySQL server is up and running and you can connect to it.

edited Mar 14, 2017 at 8:48

answered Jul 21, 2015 at 12:14

olsh

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2 Comments

Lion Over a year ago

I was confused that this solves the problem because a few days ago it worked, although I hadn't install the MySQL Connector yet. So I thought It would have something to do with the package-updates I did via NuGet a few days before. But now I installed the MySQL Connector and it worked - strange issue! Thanks for the solution :)

Brian Over a year ago

Ran into this when using MariaDB - the MariaDB installer doesn't install the Connector by default so you need to get it separately.

Alin Ciocan · Accepted Answer · 2017-05-16 07:26:36Z

1

For me this message appeared due to an incorrect connection string in Web.config.

answered May 16, 2017 at 7:26

Alin Ciocan

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1 Comment

Vanice Over a year ago

I added MultipleActiveResultSets=true to my connection string and got this error with BetterModules.Core

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