VB连接1and1 mysql数据库无法正常工作

Question

是的，我知道这是一个记录严重的问题。我也知道那里有很多“答案”。但是，这些答案中没有一个能解决我遇到的问题。我尝试了许多不同的网站和许多不同的主题，所以当我说我尝试过所有内容时你可以信任我。这是我的新帐户表单的代码，它是我程序的一部分。我的主要问题是，当我尝试连接时，程序无法访问数据库。它声明“它无法连接到任何指定的MySQL主机”。这是我的代码：

Imports MySql.Data.MySqlClient
Public Class NewAccount
Dim conn As New MySqlConnection
Public Sub connect()
    Dim DatabaseName As String = "db709866308"
    Dim server As String = "db709866308.db.1and1.com"
    Dim userName As String = "db709866308"
    Dim password As String = "*******"
    If Not conn Is Nothing Then conn.Close()
    conn.ConnectionString = String.Format("server={0}; user id={1}; password={2}; database={3}; pooling=false", server, userName, password, DatabaseName)
    Try
        conn.Open()

        MsgBox("Connected")
    Catch ex As Exception
        MsgBox(ex.Message)
    End Try
    conn.Close()
End Sub

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Dim con As New MySqlConnection
    Dim Password As String
    Dim Password2 As String
    Dim userName As String
    '''''''''''''''''''''''''''''''''''''''''''''''Encryption goes under this line''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''





    Dim plainText As String
    Dim cipherText As String

    Dim passPhrase As String
    Dim saltValue As String
    Dim hashAlgorithm As String
    Dim passwordIterations As Integer
    Dim initVector As String
    Dim keySize As Integer

    plainText = Pword.Text     ' original plaintext

    passPhrase = "Pas5pr@se"        ' can be any string
    saltValue = "s@1tValue"         ' can be any string
    hashAlgorithm = "SHA1"          ' can be "MD5"
    passwordIterations = 2          ' can be any number
    initVector = "@1B2c3D4e5F6g7H8" ' must be 16 bytes
    keySize = 256                   ' can be 192 or 128

    cipherText = RijndaelSimple.Encrypt _
    (
        plainText,
        passPhrase,
        saltValue,
        hashAlgorithm,
        passwordIterations,
        initVector,
        keySize
    )

    plainText = RijndaelSimple.Decrypt _
    (
        cipherText,
        passPhrase,
        saltValue,
        hashAlgorithm,
        passwordIterations,
        initVector,
        keySize
    )





    '''''''''''''''''''''''''''''''''''''''''''''''Encryption goes above this line''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
    Try

        conn.Open()
    Catch ex As Exception
        MessageBox.Show("Error while connecting to Server. " & ex.Message)
    End Try
    Dim cmd As New MySqlCommand(String.Format("INSERT INTO `auth` VALUES User.text, ciphertext"))
    Try
        cmd.ExecuteNonQuery()
        conn.Close()
    Catch ex As Exception
        MsgBox("Couldn't Access Database")
    End Try
End Sub

我还想强调，这不是完整的代码，只是包含某种形式连接的部分。

非常感谢提前。