vbnetascc的简单介绍

VBNET ACCESS操作方法

Imports System.Data.OleDb  

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Public Class Form1  

Dim cn As OleDbConnection  

Dim da As OleDbDataAdapter  

Dim ds As DataSet  

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load  

Dim cnStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\persons.mdb;Persist Security Info=False"  

cn = New OleDbConnection(cnStr)  

Dim sql As String = "select * from grade"  

da = New OleDbDataAdapter(sql, cn)  

ds = New DataSet  

da.Fill(ds, "grade")  

DataGridView1.DataSource = ds.Tables(0)  

End Sub  

End Class

解释：

 Dim cnStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\persons.mdb;Persist Security Info=False"  

这段是创建链接字符串，你可以根据自己数据库实际存放位置进行修改

Dim sql As String = "select * from grade"

这是数据库查询语句，你可以根据实际情况修改下

Dim sql As String = "select * from grade"  

da = New OleDbDataAdapter(sql, cn)  

ds = New DataSet  

da.Fill(ds, "grade")  

DataGridView1.DataSource = ds.Tables(0)

这是执行查询语句后，将查询的结果存入datagridview中

VB.NET连接ACCESS数据库，读取查询并显示

给你写个例子，不明白，再问！！

'引入OLEDB命令空间

Imports System.Data.OleDb

Public Class Form1

Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click

'定义一个OLEDB连接并实例化它

Dim con As New OleDbConnection

'定义一个OLEDB命令并实例化他

Dim cmd As New OleDbCommand

'定义一个OLEDBReader方法来读取数据库

Dim dr As OleDbDataReader

'初始化con的连接属性，使用OLEDB模式，数据源为：你指定下路径，我的是在D盘

con.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\dataSample.mdb"

'打开OLEDB数据连接

con.Open()

'初始化OLEDB命令的连接属性为con,这个需要你理解下

cmd.Connection = con

'初始化OLEDB命令的语句 就是查询 什么字段从什么表 条件是ID等于你在t1中输入的内容

cmd.CommandText = "select keyss from table1 where ID=" t1.Text ""

'执行OLEDB命令以ExecuteReader()方式，并返回一个OLEDBReader，赋值给dr

dr = cmd.ExecuteReader()

'判断下dr中是否有数据。如果有就把第一个值赋值给t2的值

If dr.Read() Then

t2.Text = dr(0)

End If

'完成后关闭dr.con等释放资源

dr.Close()

con.Close()

End Sub

End Class

vb.net读取Access数据库的方法

建立数据集，绑定到窗口。不会的话，把要用的表从数据集拖到窗口，再删除就行了

提取方法

数据及名称.表格名称.rows（2）.item(3).tostring 就是了

用vb.net操作access数据库

mports 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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