c#测试小程序，运行到连接mysql云数据库语句con.open()后就没有响应，哪位大神能帮诊断一下看是什么原因，谢谢！ | mysql | mysql 技术论坛-380玩彩网官网入口

using system;
using system.collections.generic;
using system.componentmodel;
using system.data;
using system.drawing;
using system.linq;
using system.text;
using system.windows.forms;
using mysql.data.mysqlclient;

namespace beauty_key
{
public partial class form1 : form
{
public form1()
{
initializecomponent();
}
mysqlconnection con = new mysqlconnection(“server=mysql.sqlpub.com;port=3306;user=weiney;password=krw2dp4c8jr9ngiz;database=weiney”);

    private void form1_load(object sender, eventargs e)
    {
        try
        {
            if (con.state == connectionstate.closed)
            {
                con.open();
                messagebox.show("云数据库连接成功！");
            }
        }
        catch (mysqlexception ex)
        {
            messagebox.show("云数据库连接失败："  ex.message);
        }
    }
}

}