Cant connect to MySQL when using Debug mode

问题

I have written in program in C# which connects to a MySQL database.

public bool Connect()
{
    bool OK = true;
    try
    {
        dbcon = new MySqlConnection(ConnectionString);
    dbcon.Open();
    }
    catch 
    {
        OK = false;
    }
    return OK;
}

For the connection string I am using

public string Server   = "localhost";
public string Database = "samplemonitor";
public string UserID   = "root";
public string Password = "password";
public bool Pooling    = false;


public string ConnectionString
{
    get 
    {
        string isPooling;
        if (Pooling)
        {
             isPooling = "true";
        }
        else
        {
            isPooling = "false";
        }

        return string.Format
        (
            "Server={0};Database={1};User ID={2};Password={3};Pooling={4}",
        Server,
        Database,
        UserID,
        Password,
        isPooling
        );
    }
}

When I run this in debug mode in mono, the program hangs on the dbcon.Open(); command

However, when I run this program from outside the debugger, everything works fine.

EDIT

Trying Vinicius' Suggestion, to use "Data Source"

I end up with an error message

e=11001, NativeErrorCode=11001. ---> System.Net.Sockets.SocketException: No such host is known

at System.Net.Dns.GetAddrInfo(String name)

at System.Net.Dns.InternalGetHostByName(String hostName, Boolean includeIPv6)

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.GetHostEntry(String hostname)

at MySql.Data.Common.StreamCreator.GetStreamFromHost(String pipeName, String hostName, UInt32 timeout)

at MySql.Data.Common.StreamCreator.GetStream(UInt32 timeout)

at MySql.Data.MySqlClient.NativeDriver.Open()

at MySql.Data.MySqlClient.NativeDriver.Open()

at MySql.Data.MySqlClient.Driver.Open()

at MySql.Data.MySqlClient.Driver.Create(MySqlConnectionStringBuilder settings)

at MySql.Data.MySqlClient.MySqlConnection.Open()

at SampleMonitor.LocalDatabaseConnection.Connect() in c:\Dev\Repositories\HD-CMC\trunk\C#\SampleMonitor\SampleMonitor\Control\LocalDatabaseConnection.cs:line 394

MySql.Data.MySqlClient.MySqlException (0x80004005): Unable to connect to any of the specified MySQL hosts. ---> System.Exception: Call to GetHostEntry failed after 00:00:00 while querying for hostname 'samplemonitor': SocketErrorCode=HostNotFound, ErrorCode

Its interesting that it did not hang on the open command this time

EDIT

This is very strange, it just decided to start working. I haven't changed any of the code. Could this be some kind of temperamental bug in Mono??

来源：https://stackoverflow.com/questions/20896747/cant-connect-to-mysql-when-using-debug-mode

标签

mysql

sql

.net

monodevelop