使用C＃连接到MYSQL数据库

Question

I have a C# application with MYSQL database. I was work without any problem but suddenly a problem appear:

A first chance exception of type 'MySql.Data.MySqlClient.MySqlException' occurred in MySql.Data.dll

I didn't change any thing in my program !!, also i checked the connection from PHP page and it was work without problem, the problem just appear in my c# application. In catch part, i changed it to: ee.HResult instead of "ee.message" and i got this number: -2147467259 .. !! Here the code:

public static string conString = "";
    public MySqlConnection objConn;
    string server = "www.******.com";
    string database = "******";
    string uid = "******";
    string password = "******";
    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        try
        {
            conString = "SERVER=" + server + ";" + "DATABASE=" + database + ";" + "UID=" + uid + ";" + "PASSWORD=" + password + "; CharSet=utf8;";
            objConn = new MySqlConnection(conString);
            objConn.Open();
            MySqlCommand cmd = new MySqlCommand("select * from sett", objConn);
            MySqlDataReader dataReader = cmd.ExecuteReader();
            dataReader.Read();
            int x = int.Parse(dataReader.GetDecimal(0).ToString());
            MessageBox.Show(x.ToString());
        }
        catch (Exception ee)
        {
            MessageBox.Show(ee.Message);
        }
    }

Answer 1

The problem is because the "Remote MySQL" in the domain. I added % mark to allow all remote connection to the database.