ASP.NET EntityFramework get database name

Question

I created an ASP.NET EF application with MySQL using the following tutorial: http://www.asp.net/identity/overview/getting-started/aspnet-identity-using-mysql-storage-with-an-entityframework-mysql-provider Its working but I don't like to set the name of my database hardcoded in the MySqlInitializer class - called myDatabaseName in the following snippet:

var migrationHistoryTableExists = ((IObjectContextAdapter)context).ObjectContext.ExecuteStoreQuery<int>(
        string.Format(
          "SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = '{0}' AND table_name = '__MigrationHistory'",
          "myDatabaseName"));

I'm looking for a way to get the name of the database from the DbContext dynamically so that I store the database-name only in the connection-string and not a second time in my MySqlInitializer. But I can't find any attribute for the name, neither in the DbContext nor in the Database-attribute of the DbContext.

Solution 1

This should do the job for you

string databaseName = context.Database.Connection.Database;

Solution 2

For those of you who are using EF core can do this as an alternative:

var databaseName = context.Database.GetDbConnection().Database

Comments

[DMX David Cardinal]

This is not up to date with EF Core 5.0

[johnny 5]

@DMXDavidCardinal What has changed in EF Core 5.0?

[DMX David Cardinal]

I never used the previous versions so I can't really compare effectively, but the DbContext.Database property is of type DatabaseFacade which does not contain the method GetDbConnection(). The SQL Connection is now defined in a protected OnConfiguring method using a DbContextOptionsBuilder. However, this optionsBuilder doesnt not seem to be accessible outside the DbContext class.

[johnny 5]

@DMXDavidCardinal It doesn't include the method because it's an extension method. See the MSDN Documentation

[DMX David Cardinal]

Ah! Thanks! Sounds pertinent enough to add to the solution IMO

[ADM-IT]

make sure you have using Microsoft.EntityFrameworkCore;, otherwise you won't have GetDbConnection() method available.