SocketException When Connection to MYSQL DB From Shared Drive ... C Drive No Problem

Hi

I am running a very simple app that tries to connect to a MYSQL DB. When I compile and run on my local C drive, it connects with no problem. But when I compile and run the same exact code on a shared drive (f drive), I get the Socket Exception below. I've searched the NET everywhere. I've seen others with this problem but have not been able to find a solution. Any ideas why this is happening when I compile and run on my F drive but not my C drive?

=========================Socket Exception Below ============================
at MySql.Data.MySqlClient.NativeDriver.Open()
at MySql.Data.MySqlClient.Driver.Open()
at MySql.Data.MySqlClient.Driver.Create(MySqlConnectionStringBuilder sett
at MySql.Data.MySqlClient.MySqlPool.GetPooledConnection()
at MySql.Data.MySqlClient.MySqlPool.TryToGetDriver()
at MySql.Data.MySqlClient.MySqlPool.GetConnection()
at MySql.Data.MySqlClient.MySqlConnection.Open()
at MYSQLConnect.DB.OpenConnection()
stem.Exception: Call to GetHostEntry failed after 00:00:00 while querying
stname 'lxsrwebdv02.and.ma.zwickerpc.com': SocketErrorCode=NoRecovery, Err
=11003, NativeErrorCode=11003. ---> System.Net.Sockets.SocketException: A
coverable error occurred during a database lookup
at System.Net.Dns.GetAddrInfo(String name)
at System.Net.Dns.InternalGetHostByName(String hostName, Boolean includeI
at System.Net.Dns.GetHostEntry(String hostNameOrAddress)
at MySql.Data.Common.StreamCreator.GetDnsHostEntry(String hostname)
--- End of inner exception stack trace ---
at MySql.Data.Common.StreamCreator.GetDnsHostEntry(String hostname)
at MySql.Data.Common.StreamCreator.GetStream(UInt32 timeout)
at MySql.Data.MySqlClient.NativeDriver.Open()
42
able to connect to any of the specified MySQL hosts.

========================================================================

Here's my program:


class Program
{
MySqlConnection connection;

public Program()
{
initDBConnection();
OpenConnection();
}


static void Main(string[] args)
{
new Program();

}
public void initDBConnection()
{
string server;
string database;
string uid;
string password;

server = "SomeServer.com";
//server = "lxsrnetservpd01.and.ma.zwickerpc.com";
//database = "DebtorDocData";
database = "SomeDB";
uid = "SomeUSERID";
password = "SomePASSWORD";
string connectionString;
connectionString = "SERVER=" + server + ";" + "DATABASE=" +
database + ";" + "UID=" + uid + ";" + "PASSWORD=" + password + ";";
connection = new MySqlConnection(connectionString);

}
public bool OpenConnection()
{
try
{
connection.Open();
Console.WriteLine("CONNECTED");
return true;
}
catch (MySqlException ex)
{
//When handling errors, you can your application's response based
//on the error number.
//The two most common error numbers when connecting are as follows:
//0: Cannot connect to server.
//1045: Invalid user name and/or password.
switch (ex.Number)
{
case 0:
Console.WriteLine("Cannot connect to server. Contact administrator");
break;
case 1042:
Console.WriteLine(ex.Message);
Console.WriteLine(ex.StackTrace);
Console.WriteLine(ex.InnerException);
Console.WriteLine(ex.Number);
break;
case 1045:
Console.WriteLine("Invalid username/password, please try again");
break;
}
Console.WriteLine(ex.Message);
Console.ReadLine();
return false;
}
}// OpenConnection

}
Thanks!

Where is the connection string that connects to the C: drive versus the F: drive?

Quote:

---

Originally Posted by Arjay

Where is the connection string that connects to the C: drive versus the F: drive?

---

The program is not connecting to the C or F drive, it's connecting to a remote database. When the program is compiled and ran on the C drive and tries to connect to the remote DB, it has no problem connecting. But when the program is compiled and ran from a shared drive (my F drive), it has the problems detailed above.

Quote:

---

Originally Posted by Randy1969

The program is not connecting to the C or F drive, it's connecting to a remote database. When the program is compiled and ran on the C drive and tries to connect to the remote DB, it has no problem connecting. But when the program is compiled and ran from a shared drive (my F drive), it has the problems detailed above.

---

Okay. By default, .net doesn't allow running programs from a network share. From what I understand there used to be a way of doing it using Code Access Security in pre .net 4.0. In .Net 4.0 CAS has gone away.

For more info search bing or google for "problems running a .net app from a remote drive" and "code access security".

IMO rather than working around the built-in security features of .net, you would be better off learning how to deploy your app using a recommended method such as Click-Once deployment. Sorry to come across as sounding preachy, but it is what it is.

Thank you much for the info. I am running in an ASP.NET 4.0 framework, so this would make sense.