vb 连接数据例子

来源：互联网发布：房产cms系统编辑：程序博客网时间：2024/05/24 08:33

   '工程-->引用添加 Microsoft activex data objects 2.5 library
    '工程-->部件添加 Microsoft flexgrid control 6.0
    Dim Cnn As New ADODB.Connection
    Cnn.ConnectionString = "Provider=microsoft.jet.oledb.4.0;data source=E:/Access DB/Database1.mdb;"
    If Cnn.State <> ADODB.ObjectStateEnum.adStateClosed Then Cnn.Close
    Cnn.Open

    Dim Rs As ADODB.Recordset
    Set Rs = New ADODB.Recordset
    With Rs
        Set .ActiveConnection = Cnn
        .CursorLocation = adUseClient
        .CursorType = adOpenKeyset
        .LockType = adLockOptimistic
        .Open "SELECT good_code,customer,sum(price*amount)/sum(amount) AS avg_price FROM sales GROUP BY good_code,customer"
        If .RecordCount > 0 Then
            MSFlexGrid1.Clear
            MSFlexGrid1.Cols = 3
            MSFlexGrid1.Rows = .RecordCount + 1
            MSFlexGrid1.TextMatrix(0, 0) = "商品编号"
            MSFlexGrid1.TextMatrix(0, 1) = "顾客名称"
            MSFlexGrid1.TextMatrix(0, 2) = "平均价格"

            .MoveLast: .MoveFirst
            For i = 1 To .RecordCount
                MSFlexGrid1.TextMatrix(i, 0) = .Fields(0).Value & vbNullString
                MSFlexGrid1.TextMatrix(i, 1) = .Fields(1).Value & vbNullString
                MSFlexGrid1.TextMatrix(i, 2) = .Fields(2).Value & vbNullString
                .MoveNext
            Next
        End If
        .Close
    End With
    Set Rs = Nothing