手把手教你使用VB来创建ASP组件(4)

3、 Add方法Add方法的目的是向数据库中添加一条新的CD信息，因此它打开的记录集要求能够更新。这就不能像OpenDB中那样仅用Open打开数据集。详细的代码见下面：Private Sub Add(Id As String, Name As String, Author As String, Price As Currency, Information As String)Dim NewConn As New ADODB.ConnectionDim NewRecordsetCD As New ADODB.RecordsetNewConn.Open "Provider=SQLOLEDB;DataSource=MUSE;Initial Catalog=Music;UserId=Wayne;Password=AbCdEfG"NewRecordsetCD.Open "SELECT * FROM CD", NewConn, adOpenDynamic, adLockOptimisticNewRecordsetCD.AddNewNewRecordsetCD.Fields("CD_ID") = IdNewRecordsetCD.Fields("CD_Name") = NameNewRecordsetCD.Fields("CD_Author") = AuthorNewRecordsetCD.Fields("CD_Price") = PriceNewRecordsetCD.Fields("CD_Information") = InformationNewRecordsetCD.UpdateEnd Sub解释：使用 NewRecordsetCD.AddNew,NewRecordsetCD.Fields(“Some_Key”)=Some_ValueNewRecordsetCD.Update 来添加一条纪录4、 Delete方法：这个方法的目的是为了删除库中的某条CD名和相关的信息。它的实现方法是通过查询表中唯一的CD_ID来定位CD信息，从而删除该行纪录 Private Sub Delete(Id As String) Dim NewConn As New ADODB.Connection Dim RecordsetDelete As New ADODB.Recordset NewConn.Open "Provider=SQLOLEDB;DataSource=MUSE;Initial Catalog=Music;UserId=Wayne;Password=AbCdEfG" ’从表中删除一条信息 NewConn.Execute "DELETE FROM CD WHERE CD_ID ='" & Id & "'", adCmdText + adExecuteNoRecords End Sub