用于Visual Basic 6.0的MySQL示例 - 读/写

Question

我想找一个使用远程MySQL库的简单例子.我知道,互联网上有一些教程,解释了如何设置ADODB.Connection和连接字符串,但我无法使它工作.谢谢你的帮助!

Answer 1

下载ODBC connector从MySQL的下载页面.

connectionstring在这里找对了.

在VB6项目中选择引用Microsoft ActiveX Data Objects 2.8 Library.如果您使用的是Windows Vista或Windows 7,那么您也可能拥有6.0库.如果您希望程序在Windows XP客户端上运行,而不是使用2.8库.如果您的Windows 7 SP 1,则由于SP1中的兼容性错误,您的程序将永远不会在任何其他具有较低规格的系统上运行.您可以在KB2517589中阅读有关此错误的更多信息.

此代码应为您提供足够的信息以开始使用ODBC连接器.

Private Sub RunQuery()
    Dim DBCon As adodb.connection
    Dim Cmd As adodb.Command
    Dim Rs As adodb.recordset
    Dim strName As String

    'Create a connection to the database
    Set DBCon = New adodb.connection
    DBCon.CursorLocation = adUseClient
    'This is a connectionstring to a local MySQL server
    DBCon.Open "Driver={MySQL ODBC 5.1 Driver};Server=localhost;Database=myDataBase; User=myUsername;Password=myPassword;Option=3;"

    'Create a new command that will execute the query
    Set Cmd = New adodb.Command
    Cmd.ActiveConnection = DBCon
    Cmd.CommandType = adCmdText
    'This is your actual MySQL query
    Cmd.CommandText = "SELECT Name from Customer WHERE ID = 1"

    'Executes the query-command and puts the result into Rs (recordset)
    Set Rs = Cmd.Execute

    'Loop through the results of your recordset until there are no more records
    Do While Not Rs.eof
        'Put the value of field 'Name' into string variable 'Name'
        strName = Rs("Name")

        'Move to the next record in your resultset
        Rs.MoveNext
    Loop

    'Close your database connection
    DBCon.Close

    'Delete all references
    Set Rs = Nothing
    Set Cmd = Nothing
    Set DBCon = Nothing
End Sub