vb.netmdb碎片的简单介绍

VB.NET如何生成ACCESS数据库？并生成表。 VB.NET

我vb.netmdb碎片的需求就是先填写好表和表中字段的名称vb.netmdb碎片，然后点击一个按钮vb.netmdb碎片，就在指定的路径生成一个ACCESS数据库。而不是事先手动创建。 请知道的各位附上完整代码vb.netmdb碎片，本人刚接触VB.NETvb.netmdb碎片，有些东西还不是很了解。谢谢。

相关问答

Q1: 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

Q2: 用vb.net 怎样建立一个mdb数据库及一张表

首先在项目的VB.NET界面，使用菜单【项目】--【添加引用】--【COM】

选择  Microsoft ADO Ext. 2.x for DDL and Security

然后单击【确定】，完成引用。

完整代码如下：

Imports ADOX

Public Class Form1

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

        '创建空的access数据库文件--数据库文件.mdb，密码为123

        Dim Mycat As Catalog = New Catalog()

        Mycat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Jet OLEDB:Engine Type=5;Data Source= 数据库文件.mdb;Jet OLEDB:Database Password=123")

        '以下代码创建一个名为“实验数据表”

        Dim MyTable As ADOX.Table = New ADOX.Table         '定义新表

        MyTable.Name = "实验数据表"    '表命名

        '给表“实验数据表” 创建一个字符串字段，字段名“姓名”

        MyTable.Columns.Append("姓名", , ADOX.DataTypeEnum.adWChar)

        '给表“实验数据表” 创建一个整数字段，字段名“学号”

        MyTable.Columns.Append("学号", ADOX.DataTypeEnum.adInteger)    '追加一个数字型字段

        '给字段“学号”创建一个主键“PimaryKey_Field”        

        MyTable.Keys.Append("学号", ADOX.KeyTypeEnum.adKeyPrimary, "学号")

        Mycat.Tables.Append(MyTable) '把所有的新字段追加到表

        MyTable = Nothing

        Mycat = Nothing

    End Sub

End Class

Q3: 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

Q4: vb.net 写入mdb数据库

1、首先vb.netmdb碎片，vb.netmdb碎片你得做一个oledbconnection对象vb.netmdb碎片，这个对象有个连接字符串vb.netmdb碎片的属性，vb.netmdb碎片你需要设置

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

Q5: 在vb.net中如何查询MDB数据库的数据

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=" Application.StartupPath "\mdb数据库名字.mdb") '定义连接

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

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

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