如何形成正确的MySQL连接字符串？

一尘不染

如何形成正确的MySQL连接字符串？

mysql

我正在使用C＃，并且试图连接到由00webhost托管的MySQL数据库。

我在网上遇到错误connection.Open()：

没有使用此参数的mysql主机。

我检查了，一切似乎都很好。

string MyConString = "SERVER=mysql7.000webhost.com;" +
        "DATABASE=a455555_test;" +
        "UID=a455555_me;" +
        "PASSWORD=something;";
         MySqlConnection connection = new MySqlConnection(MyConString);
         MySqlCommand command = connection.CreateCommand();
         MySqlDataReader Reader;
         command.CommandText = "INSERT Test SET lat=" + 
             OSGconv.deciLat + ",long=" + OSGconv.deciLon;
         connection.Open();
         Reader = command.ExecuteReader();
         connection.Close();

此连接字符串有什么问题？

阅读 332

2020-05-17

共1个答案

一尘不染

尝试以这种方式创建连接字符串：

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();
}

2020-05-17