#1
  1. Contributing User
    Devshed Newbie (0 - 499 posts)

    Join Date
    Jan 2006
    Posts
    122
    Rep Power
    9

    Angry Sqlconnection can not be made - Visual Basic 2010


    Hello again. I don't know what why this isn't working.

    I am running xampp usb light for the server as the localhost.. I am able to type localhost in my web browser and get all the default confirmations that the server is working correctly. So the server is up and running. at this point the database exists it has been created and a temp record is set.

    My issue shows its ugly face as soon as the " sqlconnection.Open()" line is reached i get this error. I see something about making sure that the network is enabled to receive connections in that error message but i haven't found any solid info on how to enable the option for xampp.. my guess is mysql isn't installed correctly or something can some one give me some guidance as to where or why the exception is being caught? i have a screen shot of the error message at the bottom of this post.


    Here is my "my.ini file for mysql from xampp"
    Code:
    # Example MySQL config file for small systems.
    #
    # This is for a system with little memory (<= 64M) where MySQL is only used
    # from time to time and it's important that the mysqld daemon
    # doesn't use much resources.
    #
    # You can copy this file to
    # /xampp/mysql/bin/my.cnf to set global options,
    # mysql-data-dir/my.cnf to set server-specific options (in this
    # installation this directory is /xampp/mysql/data) or
    # ~/.my.cnf to set user-specific options.
    #
    # In this file, you can use all long options that a program supports.
    # If you want to know which options a program supports, run the program
    # with the "--help" option.
    
    # The following options will be passed to all MySQL clients
    [client] 
    # password       = your_password 
    port            = 3306 
    socket          = "/xampp/mysql/mysql.sock"
    
    # Here follows entries for some specific programs 
    
    # The MySQL server
    [mysqld]
    port= 3306
    socket= "/xampp/mysql/mysql.sock"
    basedir="/xampp/mysql" 
    tmpdir="/xampp/tmp" 
    datadir="/xampp/mysql/data"
    pid_file="mysql.pid"
    skip-external-locking
    key_buffer = 16M
    max_allowed_packet = 1M
    table_cache = 64
    sort_buffer_size = 512K
    net_buffer_length = 8K
    read_buffer_size = 256K
    read_rnd_buffer_size = 512K
    myisam_sort_buffer_size = 8M
    log_error="mysql_error.log"
    #bind-address="127.0.0.1"
    
    
    # Don't listen on a TCP/IP port at all. This can be a security enhancement,
    # if all processes that need to connect to mysqld run on the same host.
    # All interaction with mysqld must be made via Unix sockets or named pipes.
    # Note that using this option without enabling named pipes on Windows
    # (via the "enable-named-pipe" option) will render mysqld useless!
    # 
    # commented in by lampp security
    #skip-networking
    skip-federated
    
    # Replication Master Server (default)
    # binary logging is required for replication
    # log-bin deactivated by default since XAMPP 1.4.11
    #log-bin=mysql-bin
    
    # required unique id between 1 and 2^32 - 1
    # defaults to 1 if master-host is not set
    # but will not function as a master if omitted
    server-id	= 1
    
    # Replication Slave (comment out master section to use this)
    #
    # To configure this host as a replication slave, you can choose between
    # two methods :
    #
    # 1) Use the CHANGE MASTER TO command (fully described in our manual) -
    #    the syntax is:
    #
    #    CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,
    #    MASTER_USER=<user>, MASTER_PASSWORD=<password> ;
    #
    #    where you replace <host>, <user>, <password> by quoted strings and
    #    <port> by the master's port number (3306 by default).
    #
    #    Example:
    #
    #    CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,
    #    MASTER_USER='joe', MASTER_PASSWORD='secret';
    #
    # OR
    #
    # 2) Set the variables below. However, in case you choose this method, then
    #    start replication for the first time (even unsuccessfully, for example
    #    if you mistyped the password in master-password and the slave fails to
    #    connect), the slave will create a master.info file, and any later
    #    change in this file to the variables' values below will be ignored and
    #    overridden by the content of the master.info file, unless you shutdown
    #    the slave server, delete master.info and restart the slaver server.
    #    For that reason, you may want to leave the lines below untouched
    #    (commented) and instead use CHANGE MASTER TO (see above)
    #
    # required unique id between 2 and 2^32 - 1
    # (and different from the master)
    # defaults to 2 if master-host is set
    # but will not function as a slave if omitted
    #server-id       = 2
    #
    # The replication master for this slave - required
    #master-host     =   <hostname>
    #
    # The username the slave will use for authentication when connecting
    # to the master - required
    #master-user     =   <username>
    #
    # The password the slave will authenticate with when connecting to
    # the master - required
    #master-password =   <password>
    #
    # The port the master is listening on.
    # optional - defaults to 3306
    #master-port     =  <port>
    #
    # binary logging - not required for slaves, but recommended
    #log-bin=mysql-bin
    
    
    # Point the following paths to different dedicated disks
    #tmpdir = "/xampp/tmp"
    #log-update = /path-to-dedicated-directory/hostname
    
    # Uncomment the following if you are using BDB tables
    #bdb_cache_size = 4M
    #bdb_max_lock = 10000
    
    # Comment the following if you are using InnoDB tables
    #skip-innodb
    innodb_data_home_dir = "/xampp/mysql/data"
    innodb_data_file_path = ibdata1:10M:autoextend
    innodb_log_group_home_dir = "/xampp/mysql/data"
    #innodb_log_arch_dir = "/xampp/mysql/data"
    ## You can set .._buffer_pool_size up to 50 - 80 %
    ## of RAM but beware of setting memory usage too high
    innodb_buffer_pool_size = 16M
    innodb_additional_mem_pool_size = 2M
    ## Set .._log_file_size to 25 % of buffer pool size
    innodb_log_file_size = 5M
    innodb_log_buffer_size = 8M
    innodb_flush_log_at_trx_commit = 1
    innodb_lock_wait_timeout = 50
    
    [mysqldump]
    quick
    max_allowed_packet = 16M
    
    [mysql]
    no-auto-rehash
    # Remove the next comment character if you are not familiar with SQL
    #safe-updates
    
    [isamchk]
    key_buffer = 20M
    sort_buffer_size = 20M
    read_buffer = 2M
    write_buffer = 2M
    
    [myisamchk]
    key_buffer = 20M
    sort_buffer_size = 20M
    read_buffer = 2M
    write_buffer = 2M
    
    [mysqlhotcopy]
    interactive-timeout
    Below is the visual basic code....

    [VARIABLES]
    Private mysql_host = "localhost"
    Private mysql_user = "root"
    Private mysql_pass = ""
    Private mysql_db = "game_members"

    Private sqlconnect As String = "Server=" + mysql_host + ";" + "User Id=" + mysql_user + ";" + "Password=" + mysql_pass + ";" + "Database=" + mysql_db
    Private sqlconnection As New SqlClient.SqlConnection


    [ON FORM LOAD]
    Code:
      sqlconnection.ConnectionString = sqlconnect
            Try
                If sqlconnection.State = ConnectionState.Closed Then
                    sqlconnection.Open()
    
                Else
                    sqlconnection.Open()
    
                End If
            Catch ex As Exception
                MsgBox(ex.ToString())
            End Try
    [RegisterButton]
    Code:
       Dim sqlstatement As String = "INSERT INTO loginlog(Username,Userpass,Useremail,lastlogin) VALUES('" & UsernameTextBox.Text & "','" & PasswordTextBox.Text & "','" & EmailTextBox1.Text & "','" & Now & "')"
            Dim CMD As New SqlClient.SqlCommand
            Try
                With CMD
                    .CommandText = sqlstatement
                    .CommandType = CommandType.Text
                    .Connection = sqlconnection
                    .ExecuteNonQuery()
                End With
                MsgBox("Sucessfully registered new account.")
            Catch ex As Exception
                MsgBox(ex.ToString())
            End Try
            Me.Close()
    If the image dosent work here is the URL
    http://img9.imageshack.us/img9/7215/mysqlerror.jpg

  2. #2
  3. No Profile Picture
    Stumpier old Moderator
    Devshed Supreme Being (6500+ posts)

    Join Date
    Jun 2003
    Posts
    14,409
    Rep Power
    4538
    I don't know if the mysql odbc drivers are installed as part of xampp, if not you can download them from the mysql website.

    And your connection string doesn't look right to me, but I don't use mysql from xampp and windows. I'm not aware that you can run vb code under xampp, doesn't xampp use apache for it's web server?

    There are sample documentation strings in the drivers documentation from mysql.
    ======
    Doug G
    ======
    It is a truism of American politics that no man who can win an election deserves to. --Trevanian, from the novel Shibumi
  4. #3
  5. Contributing User
    Devshed Newbie (0 - 499 posts)

    Join Date
    Jan 2006
    Posts
    122
    Rep Power
    9
    Yes xampp does use apache mysql is included i can use phpmyadmin to create the database add tables etc.. but for some reason when i try to connect to it via visual basic i get that nasty error.

    ok ill take a look into the connection string again..
  6. #4
  7. No Profile Picture
    Stumpier old Moderator
    Devshed Supreme Being (6500+ posts)

    Join Date
    Jun 2003
    Posts
    14,409
    Rep Power
    4538
    Sorry, I was confused about all the info you posted about xampp. If you're working on a VB program to connect to mysql, then xampp and web servers are irrelevant to your problem unless you're trying to use the vb code as part of a web app. In that case your server would have to run vb code server-side, which apache doesn't do.

    Either way you need mysql drivers installed on your windows machine. In addition, you should have a command-line mysql program which you can use to test the basic operation of your mysql installation to help you identify if you have a mysql problem or a code problem.

    Also mysql runs as a service on windows, is it running?
    ======
    Doug G
    ======
    It is a truism of American politics that no man who can win an election deserves to. --Trevanian, from the novel Shibumi
  8. #5
  9. Contributing User
    Devshed Newbie (0 - 499 posts)

    Join Date
    Jan 2006
    Posts
    122
    Rep Power
    9
    forgive my noobishnes....
    I got it had to browse and add mysql.data as a reference first. originally i used sql.data which was not what i needed... :P

    I got it now..
  10. #6
  11. Contributing User
    Devshed Newbie (0 - 499 posts)

    Join Date
    Jan 2006
    Posts
    122
    Rep Power
    9

    Angry myreader.hasrows wont return true


    Well that didnt last to long.. Now im having issues with myreader.hasrows

    whenever that lined is reached no matter what code snippets i find online returns False.. I can see the temp records in myphpadmin the connection is made to mysql database but still wont return TRUE.

    VAR's
    Code:
    Private mysql_host = "localhost"
        Private mysql_user = "root"
        Private mysql_pass = ""
        Private mysql_db = "tictacttoe_members"
        Private mysql_table = "loginlog"
    
        Private sqlconnect As String = "Persist Security Info=TRUE;database=" + mysql_db + ";" + "server=" + mysql_host + ";" + "user id=" + mysql_user + ";" + "pwd=" + mysql_pass + ";Connect Timeout=30"
        Private sqlconnection As New MySqlClient.MySqlConnection
    LOGIN button Code
    Code:
     Private Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click
            Dim sqlupdatestatement As String = "UPDATE '" & mysql_db & "'.'" & mysql_table & "' SET 'lastlogin' = '" & Now & "' WHERE '" & mysql_table & "'.'Username' = '" & UsernameTextBox.Text & "';"
            Dim sqlstatement As String = "SELECT * FROM " & mysql_table & " WHERE 'Username'='" & UsernameTextBox.Text & "' AND 'Userpass'='" & PasswordTextBox.Text & "';"
            Dim gotsigned As Integer
            Dim logname As String
            Dim logpass As String
            Dim cmd1 As MySqlClient.MySqlCommand
            cmd1 = New MySqlClient.MySqlCommand(sqlstatement, sqlconnection)
            If sqlconnection.State <> ConnectionState.Open Then
                sqlconnection.Open()
            End If
            Dim myReader As MySqlClient.MySqlDataReader = cmd1.ExecuteReader()
            logname = ""
            logpass = ""
            cmd1 = Nothing
            gotsigned = 0
            If myReader.HasRows = True Then
                Do While myReader.Read
                    logname = myReader.GetInt32(1)
                    logpass = myReader.GetInt32(2)
                    If logname = UsernameTextBox.Text And logpass = PasswordTextBox.Text Then
                        gotsigned = 1
                        MsgBox("Welcome " & logname)
                        myReader.Close()
                    Else
                        MsgBox("Invalid username password combo.")
                        GoTo skipupdate
                    End If
                Loop
            Else
                MsgBox("No user records not found.")
                GoTo skipupdate
            End If
                If gotsigned = 1 Then
                    Try
                        With cmd1
                            .CommandText = sqlupdatestatement
                            .CommandType = CommandType.Text
                            .Connection = sqlconnection
    
                        End With
    
                Catch ex As Exception
                    MsgBox(ex.ToString())
                    End Try
                End If
    skipupdate:
    
                Me.Close()
        End Sub
  12. #7
  13. No Profile Picture
    Stumpier old Moderator
    Devshed Supreme Being (6500+ posts)

    Join Date
    Jun 2003
    Posts
    14,409
    Rep Power
    4538
    You're going to have to hope someone who's used the mysqlclient object will jump in here, or maybe review it's documentation for clues, I don't know that client object, sorry.
    ======
    Doug G
    ======
    It is a truism of American politics that no man who can win an election deserves to. --Trevanian, from the novel Shibumi
  14. #8
  15. Contributing User
    Devshed Newbie (0 - 499 posts)

    Join Date
    Jan 2006
    Posts
    122
    Rep Power
    9
    ok thx...

IMN logo majestic logo threadwatch logo seochat tools logo