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

我也导入了MySql.Data.MySqlClient：

Imports MySql.Data.MySqlClient

但是当我点击按钮时，整个应用程序就会冻结。

我添加了对MySql.Data.dll的引用。路径：

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

此类文件是从http://dev.mysql.com/downloads/connector/net/

下载的安装程序安装的

为什么？

Answer 1

如果您尚未将连接字符串的server参数更改为指向本地安装，则可以解释为什么它会挂起。

无法连接到mysql数据库

1 个答案: