无法连接到mysql数据库

Question

VB.NET Express 2010.

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim connection As MySqlConnection
    connection = New MySqlConnection()

    connection.ConnectionString = "Server=example.com; Uid=***; Pwd=***; Database=***;"

    Try
        connection.Open()
        MessageBox.Show("Connection Opened Successfully")
        connection.Close()
    Catch mysql_error As MySqlException
        MessageBox.Show("Error Connecting to Database: " & mysql_error.Message)
    Finally
        connection.Dispose()
    End Try
End Sub

I have imported MySql.Data.MySqlClient too:

Imports MySql.Data.MySqlClient

But when I click the button, the whole application just freezes.

I have added the reference to MySql.Data.dll. The path:

C:\Program Files\MySQL\MySQL Connector Net 6.4.4\Assemblies\v4.0\MySql.Data.dll

Such file was installed from an installer downloaded from http://dev.mysql.com/downloads/connector/net/

Why is that?

Answer 1

如果尚未更改连接字符串的server参数以指向本地安装，则可以解释为什么挂起它。