无法从.NET连接器连接到Azure MySQL数据库

Question

I tried to connect to the Azure MySQL database using MySQL Workbench and MySQL Shell and it works fine. Now I am trying to connect using following C# code:

var connStringBuilder = new MySqlConnectionStringBuilder
{
    Server = "creatur-db.mysql.database.azure.com",
    Database = "test",
    UserID = "creatur_db_main@creatur-db",
    Password = "{my_password}",
    SslMode = MySqlSslMode.Preferred,
};

using (MySqlConnection connection = new MySqlConnection(connStringBuilder.ToString()))
{
    connection.Open();

    connection.Close();
}

Here I replaced {my_password} with password to the database and it gives me an exception inside Open method:

MySql.Data.MySqlClient.MySqlException: 'Authentication to host 'creatur-db.mysql.database.azure.com' for user 'creatur_db_main@creatur-db' using method 'mysql_native_password' failed with message: The connection string may not be right. Please visit portal for references.

I also tried different connection strings:

Server=creatur-db.mysql.database.azure.com; Port=3306; Database=test; Uid=creatur_db_main@creatur-db; Pwd={my_password}; SslMode=Preferred

and

Database=test; Data Source=creatur-db.mysql.database.azure.com; User Id=creatur_db_main@creatur-db; Password={my_password}

But none of them worked.

The same exception occurs when I create new connection using Server Explorer in Visual Studio 2013. It seems the error has something to do with .NET Connector. I tried to use different versions of MySQL.Data.dll, .NET Framework and Visual Studio but no luck.

Answer 1

I just created a console application using VS2017 I used Nuget package MySql.Data and .Net Framework 4.6.1

It works perfectly here What I did.

After Creating the MySQL server I used the CloudShell to connect to the SERVER (not a database).

Using this code:

mysql --host franktest.mysql.database.azure.com --user frank@franktest -p

I got an error

ERROR 9000 (HY000): Client with IP address '40.76.202.47' is not allowed to connect to this MySQL server.

So I add that IP and at the same time my IP from where I'm connected.

So once the IP were saved. I executed the previous command, and this time it worked perfectly. I created a database named: frankdemo using this command:

CREATE DATABASE frankdemo;

Then, back in VisualStudio used this code as my Main method, copied from the documentation.

static void Main(string[] args)
    {
        var builder = new MySqlConnectionStringBuilder
        {
            Server = "franktest.mysql.database.azure.com",
            Database = "frankdemo",
            UserID = "frank@franktest",
            Password = "gr3enRay14!",
            SslMode = MySqlSslMode.Required,
        };

        using (var conn = new MySqlConnection(builder.ConnectionString))
        {
            Console.WriteLine("Opening connection");
            conn.Open();

            using (var command = conn.CreateCommand())
            {
                command.CommandText = "DROP TABLE IF EXISTS inventory;";
                command.ExecuteNonQuery();
                Console.WriteLine("Finished dropping table (if existed)");

                command.CommandText = "CREATE TABLE inventory (id serial PRIMARY KEY, name VARCHAR(50), quantity INTEGER);";
                command.ExecuteNonQuery();
                Console.WriteLine("Finished creating table");

                command.CommandText = @"INSERT INTO inventory (name, quantity) VALUES (@name1, @quantity1),
                    (@name2, @quantity2), (@name3, @quantity3);";
                command.Parameters.AddWithValue("@name1", "banana");
                command.Parameters.AddWithValue("@quantity1", 150);
                command.Parameters.AddWithValue("@name2", "orange");
                command.Parameters.AddWithValue("@quantity2", 154);
                command.Parameters.AddWithValue("@name3", "apple");
                command.Parameters.AddWithValue("@quantity3", 100);

                int rowCount = command.ExecuteNonQuery();
                Console.WriteLine(String.Format("Number of rows inserted={0}", rowCount));
            }

            // connection will be closed by the 'using' block
            Console.WriteLine("Closing connection");
        }

        Console.WriteLine("Press RETURN to exit");
        Console.ReadLine();
    }

Runed it and it works

The documentation I'm referring to is:

• Create an Azure Database for MySQL server by using the Azure portal
• Azure Database for MySQL: Use .NET (C#) to connect and query data