vb连接sql数据库的模块以及使用实例.doc

打开VB6.0,新建工程SQL_data,新建一个EXE，并添加一个模块。如图一：添加引用和部件（如下两图）蓝色的两个，是要选中打勾的。注意，一个是“引用”，一个是“部件”。 二：添加一个模块 Data_Sql，并把图下面的复制粘贴到模块中。连接SQL的模块Public conn As ADODB.ConnectionPublic rs As ADODB.RecordsetPublic addFlag As Boolean 声明部分Public Function OpenCn(ByVal Cip As String, ByVal users As String, ByVal pw As String) As Boolean 连接模块 填写数据库等信息Dim mag As StringOn Error GoTo strerrmagSet conn = New ADODB.Connectionconn.ConnectionTimeout = 25conn.Provider = sqloledbconn.Properties(data source).Value = Cip 服务器的名字conn.Properties(initial catalog).Value = pubs 库名conn.Properties(integrated security).Value = SSPI 登陆类型conn.Properties(user id).Value = users SQL库名conn.Properties(password).Value = pw 密码sql = Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;password=;Initial Catalog=pubs;Data Source= 如果不用这个模块也行可以，这一句便是常用的引擎。conn.ConnectionString = sqlconn.OpenOpenCn = TrueIf conn.State = 1 Then addFlag = TrueExit Functionstrerrmag: mag = Data cant connect Call MsgBox(mag, vbOKOnly, Error:Data connect) addFlag = False Exit Function 连接错误消息End Function关闭数据库，释放连接Public Sub cloCn()On Error Resume NextIf conn.State adStateClosed Then conn.CloseSet conn = NothingEnd SubPublic Function openRs(ByVal strsql As String) As Boolean 连接数据库记录集Dim mag As StringDim rpy As BooleanOn Error GoTo strerrmag Set rs = New ADODB.Recordset If addFlag = False Then rpy = True With rs .ActiveConnection = conn .CursorLocation = adUseClient .CursorType = adOpenKeyset .LockType = adLockOptimistic .Open strsql End With addFlag = True openRs = True End 将记录集给rs Exit Functionstrerrmag: mag = data not connect Call MsgBox(mag, vbOKOnly, error:connect) openRs = False End Exit Function 连接错误消息End FunctionPublic Sub cloRs()On Error Resume NextIf rs.State adStateClosed Then rs.CloneSet rs = Nothing 释放记录集End Sub把它放入到模块文件中，以备调用。三：下面两图是模块的代码图片和窗体的代码图片 Private Sub Command1_Click()a = Trim(Text1.Text)b = Trim(Text2.Text)c = Trim(Text3.Text)Call OpenCn(a, b, c)If addFlag = True Then MsgBox (OK)Call openRs(select * from jobs)Set DataGrid1.DataSourc