vb.net修改mdb,vb修改器

vb.net 更新access数据

以下是完整模块

Imports System.Data

Imports System.IO

Imports System.Data.OleDb

Module Module1

Public cn As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\ACCESS数据库.mdb") '定义连接---这里请更改为实际数据库路径及名称

Public DataBaseRST As Integer '用来返回数据库执行结果

Public Function DataModify(ByVal str As String) As Boolean '进行数据库修改操作函数

Dim cmdinsert As New OleDbCommand

Try

cmdinsert.CommandText = str

cmdinsert.Connection = cn

If cn.State = ConnectionState.Closed Then cn.Open()

DataBaseRST = cmdinsert.ExecuteNonQuery() '用来返回执行的结果

cn.Close()

Return True

Catch ex As Exception

MessageBox.Show(Err.Description, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)

Return False

End Try

End Function

Public Function Search(ByVal str As String, ByVal DGV As DataGridView) As Boolean '查询 str---查询命令，DGV---DataGridView，用来显示数据的控件

Dim tb As New DataTable

Try

Dim ap As New OleDb.OleDbDataAdapter(str, cn)

ap.Fill(tb)

DGV.DataSource = tb

Return True

Catch ex As Exception

MessageBox.Show(Err.Description, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)

Return False

End Try

End Function

End Module

'以下是调用方法

DataModify(" insert into aa values ('1','2')")'-------这里是数据库更新操作

Search("select bb from aa",DataGridView1)'-----------这里是数据表查询操作

相关问答

Q1: vb.net 写入mdb数据库

1、首先，你得做一个oledbconnection对象，这个对象有个连接字符串的属性，你需要设置

2、做一个oledbcommand对象，这个对象有个操作字符串（SQL语句）需要设置

3、打开oledbconnection对象

4、执行oledbcommand对象

5、关闭oledbconnection对象

程序结束，希望对你有帮助

Q2: vb.net数据库操作

参考一下下面这段代码就可以了。

Imports System.Data

'引入数据库操作类命名空间

Imports System.Data.OleDb

'引入ADO.NET操作命名空间

Public Class FrmModifystInfo

Inherits System.Windows.Forms.Form

Public ADOcmd As OleDbDataAdapter

Public ds As DataSet = New DataSet()

'建立DataSet对象

Public mytable As Data.DataTable

'建立表单对象

Public myrow As Data.DataRow

'建立数据行对象

Public rownumber As Integer

'定义一个整型变量来存放当前行数

Public SearchSQL As String

Public cmd As OleDbCommandBuilder

'======================================================

#Region " Windows 窗体设计器生成的代码 "

#End Region

'======================================================

Private Sub FrmModifystInfo_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load

'窗体的载入

TxtSID.Enabled = False

TxtName.Enabled = False

ComboSex.Enabled = False

TxtBornDate.Enabled = False

TxtClassno.Enabled = False

TxtRuDate.Enabled = False

TxtTel.Enabled = False

TxtAddress.Enabled = False

TxtComment.Enabled = False '设置信息为只读

Dim tablename As String = "student_Info "

SearchSQL = "select * from student_Info "

ExecuteSQL(SearchSQL, tablename) '打开数据库

ShowData() '显示记录

End Sub

Private Sub ShowData()

'在窗口中的textbox中显示数据

myrow = mytable.Rows.Item(rownumber)

TxtSID.Text = myrow.Item(0).ToString

TxtName.Text = myrow.Item(1).ToString

ComboSex.Text = myrow.Item(2).ToString

TxtBornDate.Text = Format(myrow.Item(3), "yyyy-MM-dd ")

TxtClassno.Text = myrow.Item(4).ToString

TxtTel.Text = myrow.Item(5).ToString

TxtRuDate.Text = Format(CDate(myrow.Item(6)), "yyyy-MM-dd ")

TxtAddress.Text = myrow.Item(7).ToString

TxtComment.Text = myrow.Item(8).ToString

End Sub

Private Sub BtFirst_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtFirst.Click

'指向第一条数据

rownumber = 0

ShowData()

End Sub

Private Sub BtPrev_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtPrev.Click

'指向上一条数据

BtNext.Enabled = True

rownumber = rownumber - 1

If rownumber 0 Then

rownumber = 0 '如果到达记录的首部，行号设为零

BtPrev.Enabled = False

End If

ShowData()

End Sub

Private Sub BtNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtNext.Click

'指向上一条数据

BtPrev.Enabled = True

rownumber = rownumber + 1

If rownumber mytable.Rows.Count - 1 Then

rownumber = mytable.Rows.Count - 1 '判断是否到达最后一条数据

BtNext.Enabled = False

End If

ShowData()

End Sub

Private Sub BtLast_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtLast.Click

'指向最后一条数据

rownumber = mytable.Rows.Count - 1

ShowData()

End Sub

Private Sub BtDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtDelete.Click

mytable.Rows.Item(rownumber).Delete() '删除记录

If MsgBox( "确定要删除改记录吗？ ", MsgBoxStyle.OKCancel + vbExclamation, "警告 ") = MsgBoxResult.OK Then

cmd = New OleDbCommandBuilder(ADOcmd)

'使用自动生成的SQL语句

ADOcmd.Update(ds, "student_Info ")

BtNext.PerformClick()

End If

End Sub

Private Sub BtModify_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtModify.Click

TxtSID.Enabled = False '关键字段只读

TxtName.Enabled = True '可读写

ComboSex.Enabled = True

TxtBornDate.Enabled = True

TxtClassno.Enabled = True

TxtRuDate.Enabled = True

TxtTel.Enabled = True

TxtAddress.Enabled = True

TxtComment.Enabled = True

End Sub

Private Sub BtUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtUpdate.Click

If Not Testtxt(TxtName.Text) Then

MsgBox( "请输入姓名！ ", vbOKOnly + vbExclamation, "警告 ")

TxtName.Focus()

Exit Sub

End If

If Not Testtxt(ComboSex.Text) Then

MsgBox( "请选择性别！ ", vbOKOnly + vbExclamation, "警告 ")

ComboSex.Focus()

Exit Sub

End If

If Not Testtxt(TxtClassno.Text) Then

MsgBox( "请选择班号！ ", vbOKOnly + vbExclamation, "警告 ")

TxtClassno.Focus()

Exit Sub

End If

If Not Testtxt(TxtTel.Text) Then

MsgBox( "请输入联系电话！ ", vbOKOnly + vbExclamation, "警告 ")

TxtTel.Focus()

Exit Sub

End If

If Not Testtxt(TxtAddress.Text) Then

MsgBox( "请输入家庭住址！ ", vbOKOnly + vbExclamation, "警告 ")

TxtAddress.Focus()

Exit Sub

End If

If Not IsNumeric(Trim(TxtSID.Text)) Then

MsgBox( "请输入数字学号！ ", vbOKOnly + vbExclamation, "警告 ")

Exit Sub

TxtSID.Focus()

End If

If Not IsDate(TxtBornDate.Text) Then

MsgBox( "出生时间应输入日期格式（yyyy-mm-dd）！ ", vbOKOnly + vbExclamation, "警告 ")

Exit Sub

TxtBornDate.Focus()

End If

If Not IsDate(TxtRuDate.Text) Then

MsgBox( "入校时间应输入日期格式（yyyy-mm-dd）！ ", vbOKOnly + vbExclamation, "警告 ")

TxtRuDate.Focus()

Exit Sub

End If

myrow.Item(0) = Trim(TxtSID.Text)

myrow.Item(1) = Trim(TxtName.Text)

myrow.Item(2) = Trim(ComboSex.Text)

myrow.Item(3) = Trim(TxtBornDate.Text)

myrow.Item(4) = Trim(TxtClassno.Text)

myrow.Item(5) = Trim(TxtTel.Text)

myrow.Item(6) = Trim(TxtRuDate.Text)

myrow.Item(7) = Trim(TxtAddress.Text)

myrow.Item(8) = Trim(TxtComment.Text)

mytable.GetChanges()

cmd = New OleDbCommandBuilder(ADOcmd)

'使用自动生成的SQL语句

ADOcmd.Update(ds, "student_Info ")

'对数据库进行更新

MsgBox( "修改学籍信息成功！ ", vbOKOnly + vbExclamation, "警告 ")

TxtName.Enabled = False

ComboSex.Enabled = False

TxtBornDate.Enabled = False

TxtClassno.Enabled = False

TxtRuDate.Enabled = False

TxtTel.Enabled = False

TxtAddress.Enabled = False

TxtComment.Enabled = False '重新设置信息为只读

End Sub

Private Sub BtCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtCancel.Click

TxtSID.Enabled = False

TxtName.Enabled = False

ComboSex.Enabled = False

TxtBornDate.Enabled = False

TxtClassno.Enabled = False

TxtRuDate.Enabled = False

TxtTel.Enabled = False

TxtAddress.Enabled = False

TxtComment.Enabled = False

End Sub

Public Function ExecuteSQL(ByVal SQL As String, ByVal table As String)

Try

'建立ADODataSetCommand对象

'数据库查询函数

ADOcmd = New OleDbDataAdapter(SQL, "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\student.mdb ")

'建立ADODataSetCommand对象

ADOcmd.Fill(ds, table) '取得表单

mytable = ds.Tables.Item(0) '取得名为table的表

rownumber = 0 '设置为第一行

myrow = mytable.Rows.Item(rownumber)

'取得第一行数据

Catch

MsgBox(Err.Description)

End Try

End Function

End Class

Q3: 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

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）

Q4: vb.net2008中怎样调用资源文件中的MDB数据库

在此本人使用ADO对象访问ACCESS数据库，但ADO对象在使用前你先要进行添加，启动VB6后，单击菜单“工程-引用”，打开引用对话框，选择“Microsoft ActiveX Data Objects 2.0 Library”，将其勾选，（以2.0版本为例，实际可以选择系统中的最高版本如本人的就是2.6版本），然后在当前目录下建立一个名为“学生”的ACCESS数据库，其中表名为“表”,字段共有：学号，姓名，年龄，性别四个字段，接下来就是设计界面了(自己设计)

现在介绍如何使用代码访问ACCESS数据库：

在代码窗口中编写一个返回字符型的函数

Function Connection() As String

'数据库的连接设置配置

Connection = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" App.Path + "\学生.mdb"

End Function

该函数用于连接数据库用

Private Form_Load()

Dim cnn As New ADODB.Connection

Dim Rst As New ADODB.Recordset

cnn.Open Connection

Set Rst = New ADODB.Recordset

Rst.Open "select * from 表", cnn, adOpenKeyset, adLockOptimistic

End Sub

注：

Dim cnn As New ADODB.Connection创建一个ADO数据库连接对象

Dim Rst As New ADODB.Recordset为创建一个ADO数据库记录对象

select * from 表 是SQL查询语言，这里为数据源，意思就是打开数据库“学生”中的表“表”

下面是将数据库表中的字段值显示出来的一个过程

Sub View()

Dim i As Integer

For i = 0 To 2

Text1(i) = Rst.Fields(i)'text1为控件数组

Next

If (Rst.Fields(3) = True) Then

Text1(3) = "男"

Else

Text1(3) = "女"

End If

End Sub

要访问ACCESS数据库就这样可以实现，访问SQL也差不多，稍有不同，回答完毕，如还有问题请继续和我联系，本人是专使用VB+SQL/Delphi+SQL开发数据库管理系统的程序员。

Q5: VB.net修改datagridview更新access数据库的问题

有这个提示，说明错误在你的SQL语句中。你检查一下你代码中的SQL语句。