“不支持关键字” MySQL C＃

Question

I am developing a WinForms application in c# and MySQL (server from GearHost) for data storage. Now, I created a class to deal with SQL operations but everytime I call it my code throws the error "KeyWord not supported". I've read other similar questions but found nothing that works with my code.

string connectionString = @"datasource=mysql#.gear.host;port=3306;username=######;pwd=##########;database=########;";
MySqlConnection databaseConnection = new MySqlConnection(connectionString);

Answer 1

You can use the a connection string builder so you don't have to worry about mis-typing any of the keywords.

var conn_string = new MySqlConnectionStringBuilder();
conn_string.Server = "######";
conn_string.UserID = "#######";
conn_string.Password = "#######";
conn_string.Database = "#######";

using (var conn = new MySqlConnection(conn_string.ToString()))
using (var cmd = conn.CreateCommand())
{
     cmd.CommandText = "your command text";
     conn.Open();
     cmd.ExecuteNonQuery();
}

Answer 2

Instead of:

string connectionString = @"datasource=mysql#.gear.host;port=3306;username=######;pwd=##########;database=########;";

Go with:

string connectionString = @"server=mysql#.gear.host;port=3306;uid=########;password=########;database=########;";

More examples here: https://www.connectionstrings.com/mysql/