我创建了一个连接数据库的测试程序（UWP应用程序）。起初，我尝试使用本地服务器xampp将其连接到本地数据库，并且它与此代码配合良好：
server = "166.62.27.167";
database = "doorlock_system";
uid = "philipplaz";
password = "philipp123";
string connectionString = "SERVER=" + server + ";" + "DATABASE=" + database + ";" + "UID=" + uid + ";" + "PASSWORD=" + password + ";SslMode=None";
connection = new MySqlConnection(@connectionString);
System.Text.EncodingProvider ppp;
ppp = System.Text.CodePagesEncodingProvider.Instance;
System.Text.Encoding.RegisterProvider(ppp);
if (connection.State == MySql.Data.MySqlClient.ConnectionState.Closed)
{
try { connection.Open(); }
catch (MySqlException e)
{
var dialog1 = new MessageDialog(e.ToString());
await dialog1.ShowAsync();
}
MySqlCommand commandInsert = new MySqlCommand("INSERT INTO user(username) VALUES (@username)", connection);
commandInsert.Parameters.AddWithValue("@username", userName);
commandInsert.ExecuteNonQuery();
commandInsert.Parameters.Clear();
var dialog = new MessageDialog("Username Inserted!");
await dialog.ShowAsync();
}
成功连接后，我尝试使用GoDaddy作为网络主机连接到在线数据库，但不幸的是我无法连接。这是我对上述程序所做的更改
server = "166.62.27.167";
database = "doorlock_system";
uid = "philipplaz";
password = "philipp123";