Adding schema EF Core table attribute

c# ef-code-first entity-framework entity-framework-core

Question

I'm struggling a bit to adding a schema to a table attribute in EF Core. When running ado.net the following works fine:

private static void Reademps()
{
    string sql = "SELECT [Id],[empno] FROM [encrypt].[dbo].[emps]";

    var connection = new SqlConnection(connectionString);
    var command = new SqlCommand(sql, connection);

    connection.Open();

    using (SqlDataReader reader = command.ExecuteReader(System.Data.CommandBehavior.CloseConnection))
    {
        while (reader.Read())
        {
            Console.WriteLine($"id: {reader[0]} empno: {reader[1]}");
        }
    }
}

However trying to convert to EF Core:

private async Task ReadempsAsync()
{
    using (var context = new EmpsContext())
    {
        List<Emp> emps = await context.Emps.ToListAsync();

        foreach (var b in emps)
        {
            Console.WriteLine($"{b.Id} {b.Empno}");
        }
    }
}

internal class EmpsContext : DbContext
{
    private const string ConnectionString = @"server=localhost\SQLEXPRESS;Database=master;Integrated security=true;Database=master;Column Encryption Setting=enabled";

    public DbSet<Emp> Emps { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        base.OnConfiguring(optionsBuilder);
        optionsBuilder.UseSqlServer(ConnectionString);
    }
}

[Table("emps", Schema = "encrypt")]
public class Emp
{
    public int Id { get; set; }
    [Required]
    [StringLength(50)]
    public string Empno { get; set; }  
}

I keep getting an error:

System.Data.SqlClient.SqlException: 'Invalid object name 'encrypt.emps'.'

1
1
3/4/2019 5:00:57 AM

Accepted Answer

In your SQL - [encrypt] appears to be the database name - not the schema name (that would be the dbo in the middle).

SELECT [Id],[empno] FROM [encrypt].[dbo].[emps]
                         ********* ***** ******
                         *         *     * Table Name
                         *         * Schema name 
                         * Database name

So your EF Core table declaration is wrong since it defines the schema to be encrypt - but that's not the case.

So this:

[Table("emps", Schema = "encrypt")]
public class Emp

should really be:

[Table("emps", Schema = "dbo")]
               **************
public class Emp
2
3/4/2019 5:03:43 AM

Popular Answer

You have to just use "dbo" for Schema because of encrypt is not schema name. It is just database name. It will be like this:

[Table("emps", Schema = "dbo")]
public class Emp
{
    public int Id { get; set; }
    [Required]
    [StringLength(50)]
    public string Empno { get; set; }  
}

NOTE:

In your connection string change Database to encrypt. Your connection string will be like:

private const string ConnectionString = @"server=localhost\SQLEXPRESS;Database=encrypt;Integrated security=true;Column Encryption Setting=enabled";


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