关于vb.net数据库实例的信息
求VB.NET2010连接MDB数据库后，添加、修改和删除等写法示例
引用 Microsoft ActiveX Data Objects 2.8 Library
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或者加入microsoft ado data control
定义数据库连接
Dim Cnn As New ADODB.Connection
定义操作记录
Dim Res As New ADODB.Recordset
开始使用
If Res.State = 1 Then Res.Close
Res.CursorLocation = adUseClient
Res.Open "SELECT * From 发票表", Cnn, adOpenDynamic, adLockReadOnly
删除用res.Delete
添加用res.AddNew
res.Fields("序号") = Trim(Res.Fields("序号"))
...
res.Update
更新用Res.Update "序号", 111
列：
'写入产品信息
Sub WriteFP()
'On Error Resume Next
Dim SyBaseRes As New ADODB.Recordset
PB.value = 0
Res.Open "SELECT Count(*) From ICSaleEntry INNER JOIN t_Item ON ICSaleEntry.FItemID = t_Item.FItemID INNER JOIN t_MeasureUnit ON ICSaleEntry.FUnitID = t_MeasureUnit.FMeasureUnitID", SQLServer, adOpenDynamic, adLockReadOnly
Text2.Text = "当前共 " Val(Res.Fields(0)) "条数据"
PB.Max = Val(Res.Fields(0))
If Res.State = 1 Then Res.Close
Res.Open "SELECT ICSaleEntry.FDetailID AS 序号,ICSaleEntry.FInterID AS 物料编号, t_Item.FName AS 产品名称,ICSaleEntry.FAuxPrice AS 单价, ICSaleEntry.FAuxQty AS 数量,ICSaleEntry.FAmount AS 原币, ICSaleEntry.FStdAmount AS 本币,t_MeasureUnit.FName AS 单位 FROM ICSaleEntry INNER JOIN t_Item ON ICSaleEntry.FItemID = t_Item.FItemID INNER JOIN t_MeasureUnit ON ICSaleEntry.FUnitID = t_MeasureUnit.FMeasureUnitID", SQLServer, adOpenDynamic, adLockReadOnly
Do While Not Res.EOF
If SyBaseRes.State = 1 Then SyBaseRes.Close
SyBaseRes.Open "select * from 物料表 where 序号='" Res.Fields("序号") "'", Cnn, adOpenDynamic, adLockOptimistic
If SyBaseRes.EOF Then
Text2.Text = Text2.Text + vbCrLf + "正在添加: " Trim(Res.Fields("序号"))
SyBaseRes.AddNew
SyBaseRes.Fields("序号") = Trim(Res.Fields("序号"))
SyBaseRes.Fields("产品编号") = Trim(Res.Fields("物料编号"))
SyBaseRes.Fields("产品名称") = Trim(Res.Fields("产品名称"))
SyBaseRes.Fields("单价") = Trim(Res.Fields("单价"))
SyBaseRes.Fields("数量") = Trim(Res.Fields("数量"))
SyBaseRes.Fields("原币") = Trim(Res.Fields("原币"))
SyBaseRes.Fields("本币") = Trim(Res.Fields("本币"))
SyBaseRes.Fields("单位") = Trim(Res.Fields("单位"))
SyBaseRes.Fields("数据库名") = Trim(Text1.Text)
SyBaseRes.Update
Else
Text2.Text = Text2.Text + vbCrLf + "正在更新: " Trim(Res.Fields("序号"))
SyBaseRes.Update "序号", Trim(Res.Fields("序号"))
SyBaseRes.Update "产品编号", Trim(Res.Fields("物料编号"))
SyBaseRes.Update "产品名称", Trim(Res.Fields("产品名称"))
SyBaseRes.Update "单价", Trim(Res.Fields("单价"))
SyBaseRes.Update "数量", Trim(Res.Fields("数量"))
SyBaseRes.Update "原币", Trim(Res.Fields("原币"))
SyBaseRes.Update "本币", Trim(Res.Fields("本币"))
SyBaseRes.Update "单位", Trim(Res.Fields("单位"))
SyBaseRes.Update "数据库名", Trim(Text1.Text)
End If
PB.value = PB.value + 1
Res.MoveNext
DoEvents
Loop
If SyBaseRes.State = 1 Then SyBaseRes.Close
Set SyBaseRes = Nothing
End Sub
网络希望不要用ACCESS用ASA（就是sybase那个太强了）
请各位大侠给出用VB.NET连接oracle数据库并执行sql查询语句的代码示例，谢谢！！
Dim OraSession As Object '会话对象
Dim OraDatabase As Object '数据库对象
Dim OraDynaset As Object'动态集对象
Dim OraDatabase As Object’字段集对象
Set OraSession =CreateObject("OracleInProcServer.XOraSession")
Set OraDatabase=OraSession.CreateDatabase
("Demo","scott/tiger",0)'建立数据库连接
Set OraDynaset=OraDatabase.CreateDynaset("select*from
student",0)'初始化动态集对象
’添加记录
'Begin an AddNew
OraDynaset.DbAddNew
OraDynaset.Fields("ID").value="1000"
’ID为列名
OraDynaset.DbUpdate'更新数据到表
’删除
OraDynaset.DbDelete
'修改
OraDynaset.DbEdit
OraDynaset.Fields("ID").value="101210"
OraDynaset.DbUpdate
求一个用VB.net操作access数据库的例程
Imports System
Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms
Imports System.Data.OleDb
Imports System.Data
Public Class Form1
Inherits Form
Private components As System.ComponentModel.Container = Nothing
Private WithEvents lastrec As Button
Private WithEvents nextrec As Button
Private WithEvents previousrec As Button
Private WithEvents firstrec As Button
Private t_books As TextBox
Private t_nl As TextBox
Private t_xb As TextBox
Private t_xm As TextBox
Private t_id As TextBox
Private l_books As Label
Private l_nl As Label
Private l_xb As Label
Private l_xm As Label
Private l_id As Label
Private label1 As Label
Private myDataSet As DataSet
Private WithEvents button1 As Button
Private WithEvents button2 As Button
Private WithEvents button3 As Button
Private WithEvents button4 As Button
Private myBind As BindingManagerBase
Public Sub New ( )
MyBase.New ( )
GetConnected ( )
InitializeComponent ( )
End Sub
'清除在程序中使用过的资源
Protected Overloads Overrides Sub Dispose (ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose ( )
End If
End If
MyBase.Dispose ( disposing )
End Sub
Public Sub GetConnected ( )
'创建一个数据连接
Dim strCon As String = " Provider = Microsoft.Jet.OLEDB.4.0 ;
Data Source = db.mdb "
Dim myConn As OleDbConnection = New OleDbConnection ( )
myConn.ConnectionString = strCon
Dim strCom As String = " SELECT * FROM person "
'创建一个 DataSet
myDataSet = New DataSet ( )
myConn.Open ( )
'通过OleDbDataAdapter对象得到一个数据集
Dim myCommand As OleDbDataAdapter = New OleDbDataAdapter
( strCom , myConn )
'把Dataset绑定books数据表
myCommand.Fill ( myDataSet , "person" )
'关闭此数据连接
myConn.Close ( )
End Sub
'插入数据记录操作代码
Private Sub button2_Click (ByVal sender As Object , _
ByVal e As System.EventArgs) Handles button2.Click
'判断所有字段是否添完，添完则执行，反之弹出提示
If ( t_id.Text "" And t_xm.Text ""
And t_xb.Text "" And t_nl.Text ""
And t_books.Text "" ) Then
Dim myConn1 As String = " Provider = Microsoft.Jet.OLEDB.4.0 ;
Data Source = db.mdb"
Dim myConn As OleDbConnection = New OleDbConnection ( myConn1 )
myConn.Open ( )
Dim strInsert As String = " INSERT INTO person ( id , xm , xb , nl
, zip ) VALUES ( " _
t_id.Text + " , '" _
t_xm.Text + "' , '" _
t_xb.Text + "' , " _
t_nl.Text + " , " _
t_books.Text + ")"
Dim inst As OleDbCommand = New OleDbCommand ( strInsert , myConn )
inst.ExecuteNonQuery ( )
myConn.Close ( )
myDataSet.Tables ( "person" ).Rows ( myBind.Position ).BeginEdit ( )
myDataSet.Tables ( "person" ).Rows ( myBind.Position ).EndEdit ( )
myDataSet.Tables ( "person" ).AcceptChanges ( )
Else
MessageBox.Show ( "必须填满所有字段值！" , "错误！" )
End If
End Sub
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