Why Am I Getting \'There Is No MySQL Host With These Parameters\' Error?

Troubleshooting MySQL Connection String Errors

When attempting to establish a connection to a MySQL database hosted by 00webhost, users may encounter the error "there is no MySQL host with these parameters." This can be puzzling, as it often seems like all connection parameters are correct.

To resolve this issue, it's crucial to revisit the MySQL connection string and verify its components. An incorrect connection string can lead to the error message mentioned above.

Correcting the Connection String

The provided C# code utilizes the following connection string:

string MyConString = "SERVER=mysql7.000webhost.com;" +
            "DATABASE=a455555_test;" +
            "UID=a455555_me;" +
            "PASSWORD=something;";

However, to establish a valid MySQL connection, it's advisable to create the connection string as follows:

MySqlConnectionStringBuilder conn_string = new MySqlConnectionStringBuilder();
conn_string.Server = "mysql7.000webhost.com";
conn_string.UserID = "a455555_test";
conn_string.Password = "a455555_me";
conn_string.Database = "xxxxxxxx";

using (MySqlConnection conn = new MySqlConnection(conn_string.ToString()))
using (MySqlCommand cmd = conn.CreateCommand())
{    //watch out for this SQL injection vulnerability below
     cmd.CommandText = string.Format("INSERT Test (lat, long) VALUES ({0},{1})",
                                    OSGconv.deciLat, OSGconv.deciLon);
     conn.Open();
     cmd.ExecuteNonQuery();
}

Conclusion

By meticulously reviewing the MySQL connection string and ensuring that each parameter is properly assigned, you can prevent the frustrating error "there is no MySQL host with these parameters." The connection string should include the server address, database name, username, and password, all of which must be accurate for a successful connection.

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