vb不用ODBC,能否使用sql server作后台数据库？
vb不用ODBC,能否使用sql server作后台数据库？
如何使vb 能像asp那样，用连接串连接不同的数据库类型，而不用在 控制面板 中设置odbc数据源，请给出方法和关键代码
问题点数：100、回复次数：14Top
1 楼XLYT（雨田）回复于 2002-12-06 18:46:21 得分 5
在窗体中放一个ADO数据控件，然后设置其属性（用OLEDB连接），再把连接属性复制出来就可以了。Top
2 楼wuhee_snowwolf（雪狼）回复于 2002-12-06 18:53:37 得分 0
用ADO代码直接连接我觉得更好。
具体代码可以看MSDN。里面很详细的。Top
3 楼mousean（快乐无限）回复于 2002-12-06 18:59:51 得分 40
可以使用连接字串数据库
各种数据库的连接字串参见：
http://www.connectionstrings.com/
借助数据控件连接数据库如楼上所言，另外可以不用数据控件，在工程中引用microsoft activex data objects 2.0 library (2000可引用2.5)
一个实例：
Public Function Get_Data(ByVal S_SQL_str As String) As Recordset '得到记录集
Dim con As ADODB.Connection
Dim rs As ADODB.Recordset
Dim strcnn As String
Set con = New ADODB.Connection
Set rs = New ADODB.Recordset
con.Open "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=yourdatabase;Data Source=servers"
rs.CursorLocation = adUseClient
rs.CursorType = adOpenStatic
rs.Open S_SQL_str, con, adOpenDynamic, adLockOptimistic
Set Get_Data = rs
Set con = Nothing
Set rs = Nothing
If Err.Number <> 0 Then
If Err.Number = 3704 Then
MsgBox "连接失败!" , vbInformation, "信息！"
Else
MsgBox Err.Description, vbInformation, "信息！"
End If
Exit Function
End If
End Function
Top
4 楼mousean（快乐无限）回复于 2002-12-06 19:01:01 得分 0
老是遗忘注明条件：
S_SQL="select * from Yourtable"Top
5 楼linghuxiaochong（B&N）回复于 2002-12-06 19:12:44 得分 0
谢谢各位，我的意思是尽可能多的使用代码，少用难以移植的东西如odbc,急，以后再结帖吧Top
6 楼Arcan（Arcan）回复于 2002-12-06 19:19:16 得分 10
用ADO
Dim Cn1 As ADODB.Connection
Dim Rs1 As ADODB.Recordset
Set Cn1 = New ADODB.Connection
ConnectStr = "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=lgjygl;Data Source=ServerName"
Cn1.Open ConnectStr, "sa(用户名)", "1234（密码）"
Set Rs1 = New ADODB.Recordset
Rs1.Open "Select * from Table where ……", Cn1, adOpenStatic
Top
7 楼cngo（阿果）回复于 2002-12-06 19:26:15 得分 0
当然可以.而且用纯代码灵活性好.Top
8 楼webmigrator（网络候鸟）回复于 2002-12-06 19:54:52 得分 5
用ado
建立类（如：adoConn.cls）封装数据库的连接和事务、执行sql、断开等方法操作
在程序启动时，建立全局的数据库类对象，利用对象负责所有对数据库的操作
方案灵活、可重用性好Top
9 楼flyycyu（fly）回复于 2002-12-06 20:08:23 得分 0
用ole dbTop
10 楼jspan79（兰特）回复于 2002-12-06 20:12:17 得分 40
如果用SQL，在VB中不必用ADODC控件，只要有数据源就可以用添加代码的方式来连接数据库，我对ASP不是很熟，不好根据ASP说什么只给你个例子：
我有用SQL Server建的数据库JinShengLiCai，其中有一张表J_MiMa，其中有两个字段UserID、Password。
用代码设计如下：
Dim WithEvents adoPrimaryRS As Recordset
Dim mbChangedByCode As Boolean
Dim mvBookMark As Variant
Dim mbEditFlag As Boolean
Dim mbAddNewFlag As Boolean
Dim mbDataChanged As Boolean
Private Sub Form_Load()
'连接数据库
Dim db As Connection
Set db = New Connection
db.CursorLocation = adUseClient
db.Open "PROVIDER=MSDASQL;dsn=JinCai;uid=;pwd=;"
'连接字段
Set adoPrimaryRS = New Recordset
adoPrimaryRS.Open "select UserID,password from J_MiMa", db, adOpenStatic, adLockOptimistic
Dim oText As TextBox
'绑定文本框到数据提供者
For Each oText In Me.txtFields
Set oText.DataSource = adoPrimaryRS
Next
mbDataChanged = False
End Sub
Private Sub Form_Resize()
On Error Resume Next
'设计仿ADO控件的按钮位置
lblStatus.Width = Me.Width - 1500
cmdNext.Left = lblStatus.Width + 700
cmdLast.Left = cmdNext.Left + 340
End Sub
Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
If mbEditFlag Or mbAddNewFlag Then Exit Sub
Select Case KeyCode
Case vbKeyEscape
cmdClose_Click
Case vbKeyEnd
cmdLast_Click
Case vbKeyHome
cmdFirst_Click
Case vbKeyUp, vbKeyPageUp
If Shift = vbCtrlMask Then
cmdFirst_Click
Else
cmdPrevious_Click
End If
Case vbKeyDown, vbKeyPageDown
If Shift = vbCtrlMask Then
cmdLast_Click
Else
cmdNext_Click
End If
End Select
End Sub
Private Sub Form_Unload(Cancel As Integer)
Screen.MousePointer = vbDefault
End Sub
Private Sub adoPrimaryRS_MoveComplete(ByVal adReason As ADODB.EventReasonEnum, ByVal pError As ADODB.Error, adStatus As ADODB.EventStatusEnum, ByVal pRecordset As ADODB.Recordset)
'为这个 recordset 显示当前记录位置
lblStatus.Caption = "Record: " & CStr(adoPrimaryRS.AbsolutePosition)
End Sub
Private Sub adoPrimaryRS_WillChangeRecord(ByVal adReason As ADODB.EventReasonEnum, ByVal cRecords As Long, adStatus As ADODB.EventStatusEnum, ByVal pRecordset As ADODB.Recordset)
'验证代码置于此处
'下列动作发生时该事件被调用
Dim bCancel As Boolean
Select Case adReason
Case adRsnAddNew
Case adRsnClose
Case adRsnDelete
Case adRsnFirstChange
Case adRsnMove
Case adRsnRequery
Case adRsnResynch
Case adRsnUndoAddNew
Case adRsnUndoDelete
Case adRsnUndoUpdate
Case adRsnUpdate
End Select
If bCancel Then adStatus = adStatusCancel
End Sub
Private Sub cmdAdd_Click() '“新增记录”按钮代码
On Error GoTo AddErr
With adoPrimaryRS
If Not (.BOF And .EOF) Then
mvBookMark = .Bookmark
End If
.AddNew
lblStatus.Caption = "添加记录"
mbAddNewFlag = True
SetButtons False
End With
Exit Sub
AddErr:
MsgBox Err.Description
End Sub
Private Sub cmdDelete_Click() '“删除记录”按钮代码
On Error GoTo DeleteErr
With adoPrimaryRS
.Delete
.MoveNext
If .EOF Then .MoveLast
End With
Exit Sub
DeleteErr:
MsgBox Err.Description
End Sub
Private Sub cmdRefresh_Click() '“刷新数据库”按钮代码
'只有多用户应用程序需要
On Error GoTo RefreshErr
adoPrimaryRS.Requery
Exit Sub
RefreshErr:
MsgBox Err.Description
End Sub
Private Sub cmdEdit_Click() '“编辑记录”按钮代码
On Error GoTo EditErr
lblStatus.Caption = "编辑记录"
mbEditFlag = True
SetButtons False
Exit Sub
EditErr:
MsgBox Err.Description
End Sub
Private Sub cmdCancel_Click() '“取消修改”按钮代码
On Error Resume Next
SetButtons True
mbEditFlag = False
mbAddNewFlag = False
adoPrimaryRS.CancelUpdate
If mvBookMark > 0 Then
adoPrimaryRS.Bookmark = mvBookMark
Else
adoPrimaryRS.MoveFirst
End If
mbDataChanged = False
End Sub
Private Sub cmdUpdate_Click() '“确定修改”或“更新修改”按钮代码
On Error GoTo UpdateErr
adoPrimaryRS.UpdateBatch adAffectAll
If mbAddNewFlag Then
adoPrimaryRS.MoveLast '移到新记录
End If
mbEditFlag = False
mbAddNewFlag = False
SetButtons True
mbDataChanged = False
Exit Sub
UpdateErr:
MsgBox Err.Description
End Sub
Private Sub cmdClose_Click()
Unload Me
End Sub
Private Sub cmdFirst_Click() '“第一条记录”按钮代码
On Error GoTo GoFirstError
adoPrimaryRS.MoveFirst
mbDataChanged = False
Exit Sub
GoFirstError:
MsgBox Err.Description
End Sub
Private Sub cmdLast_Click() '“最后一条记录”按钮代码
On Error GoTo GoLastError
adoPrimaryRS.MoveLast
mbDataChanged = False
Exit Sub
GoLastError:
MsgBox Err.Description
End Sub
Private Sub cmdNext_Click() '“下一条记录”按钮代码
On Error GoTo GoNextError
If Not adoPrimaryRS.EOF Then adoPrimaryRS.MoveNext
If adoPrimaryRS.EOF And adoPrimaryRS.RecordCount > 0 Then
Beep
'已到最后返回
adoPrimaryRS.MoveLast
End If
'显示当前记录
mbDataChanged = False
Exit Sub
GoNextError:
MsgBox Err.Description
End Sub
Private Sub cmdPrevious_Click() '“上一条记录”按钮代码
On Error GoTo GoPrevError
If Not adoPrimaryRS.BOF Then adoPrimaryRS.MovePrevious
If adoPrimaryRS.BOF And adoPrimaryRS.RecordCount > 0 Then
Beep
'已到最后返回
adoPrimaryRS.MoveFirst
End If
'显示当前记录
mbDataChanged = False
Exit Sub
GoPrevError:
MsgBox Err.Description
End Sub
Private Sub SetButtons(bVal As Boolean) '按钮代码显示设计
cmdAdd.Visible = bVal
cmdEdit.Visible = bVal
cmdUpdate.Visible = Not bVal
cmdCancel.Visible = Not bVal
cmdDelete.Visible = bVal
cmdClose.Visible = bVal
cmdRefresh.Visible = bVal
cmdNext.Enabled = bVal
cmdFirst.Enabled = bVal
cmdLast.Enabled = bVal
cmdPrevious.Enabled = bVal
End Sub
以上代码是一个页面的总设计，包括ADO代码的连接，及各个按钮功能。只要在窗体上加上控件就可用。！
这上面的代码都是在WIN2000＋VB6.0＋MS SQL 2000下通过，直接复制、粘帖就可以了！
Top
11 楼Leftie（左手,为人民币服务）回复于 2002-12-07 12:04:19 得分 0
能不用ODBC就不要用它，它是最慢的Top
12 楼wangjg_79（编程高手）回复于 2002-12-07 12:14:39 得分 0
同意 mousean(幻想无限)Top
13 楼zqfleaf（动力港湾）回复于 2002-12-07 12:34:23 得分 0
adoTop
14 楼linghuxiaochong（B&N）回复于 2002-12-10 19:57:39 得分 0
真是收获颇丰呀。thank you,my friends.Top
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