mysql连接失败与c#

Question

we have many databases(every server one database) with same structure

if i wanna connect to fist server with my code (c# .net 6) its will be connect but when wanna connect to other server cant connect to them. i test ping cmd for other server to test the connection and the server will be response well i dont know what to do . any help ?

heres my code :

using (var con = new MySqlConnection("Server = *****.105; Database = asterisk; Uid = asterisk; Pwd = *******; port=3306;"))

{

    try

    {

        con.Open();

        con.Close();
    }
    catch
    {
        Console.WriteLine("false");
    }

}

i tried with name and ip,port and test with mysql.data.mysqlclient and mysql.connector library but it doest work !!!!!

heres my exeption :

SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

and

IOException: Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond..

Answer 1

Use the "SqlConnectionStringBuilder" object to connect to mysql.SqlConnectionStringBuilder can be used to help generate connection strings.

        // Information about connecting to the database
         MySqlConnectionStringBuilder builder = new MySqlConnectionStringBuilder();
         //username
         builder.UserID = "root";
         //password
         builder.Password = "root";
         //server address
         builder.Server = "localhost";
         //database when connecting
         builder.Database = "***";
         //Define the link to the data connection
         MySqlConnection connection = new MySqlConnection(builder.ConnectionString);
         // open this link
         connection.Open();

Redownload mysql:

mysql connection code:

        //Define mysql connection string
         string constring = "data source=localhost;database=test1;user id=root;password=root;pooling=true;charset=utf8;";
         //connect to mysql
         MySqlConnection msc = new MySqlConnection(constring);
         msc.open();
      

Hope it helps you.