请朋友帮忙：VB2008 *** 作Access数据库。完成连接、添加、修改、删除、读某个列值至变量等完整的代码示例谢

VB access,添加/删除/修改记录代码 给你一个示例,这个是用户登录系统

'准备工作: 数据库 D:\Mydb.mdb 数据库中,建数据表:UserInfo,数据表中,建字段:User,Password,并添加一条记录

'点工程->引用 选中 Microsoft Activex Data Objects 2.1 Library

'控件:添加一个文本框,一个命令按钮

Private Sub Command1_Click()

Dim s As String

Dim Conn As New ADODB.Connection

Dim Rs As New ADODB.Recordset

Conn.Open "Provider=Microsoft.Jet.OLEDB.4.0Data Source=D:\mydb.mdb"

'请将数据库名及路径换成你的实际数据库名及路径

Dim UserName As String

Dim Password As String

s = Text1.Text

If s = "1" Or s = "2" Then

UserName = InputBox("请输入用户名")

Password = InputBox("请输入用户密码")

sql = "Select * From [UserInfo] where User='" &UserName &"'"

'UserInfo请换成你的实际数据表名

Rs.Open sql, Conn, 1, 3

If Rs.EOF Then

MsgBox "没有找到此用户"

Else

If Rs("Password") = Password Then

If s = "1" Then

MsgBox "123"

ElseIf s = "2" Then

MsgBox "456"

End If

Else

MsgBox "密码错误"

End If

End If

End If

End Sub

上面的例子实现了查询

如果是要添加,删除,更新等 *** 作,只要编写相应的SQL语句,再用

Conn.Execute SQL 就可以了,如:

添加的:

SQL="Insert Into [UserInfo](User,Password) Values('aaaa','1234')"

Conn.Execute SQL '执行后,就添加了一条记录

删除:

SQL="Delete From [UserInfo] Where User='aaaa'"

Conn.Execute SQL '删除用户名为aaaa的用户记录

更新:

SQL="Update [UserInfo] Set Password='abcdefg' Where User='aaaa'"

Conn.Execute SQL '执行后,修改用户aaaa的密码为abcdefg

以上只是示例,在实际使用过程中,可以将一些内容用控件输入等方式进行,这样就有很大的灵活性了

动态创建数据库

引用 microsoft DAP 3.6 Object Library

Dim myDB As DAO.Database

Set myDB = CreateDatabase(App.Path + "\111.mdb", dbLangGeneral) '如果不存在数据库

Set myDB = OpenDatabase(App.Path + "\111.mdb") '如果存在数据库

Dim str_SQL As String

str_SQL = "Create Table NewTable1(Field1 Text(10),Field2 Short)"

myDB.Execute str_SQL

str_SQL = "Create Table NewTable2(Field1 Text(10),Field2 Short)"

myDB.Execute str_SQL

myDB.Close

向已经建好的数据库中添加记录

建立数据库a，表名字b,字段c，文本格式,在窗体上画一command ,画一个文本框，这个代码就是将文本内容写入数据库

要先引用microsoft activeX data object 2.5 library

代码如下：

Private Sub Command1_Click()

Dim cnDk As New ADODB.Connection

Dim strDk As String

Dim rDk As New ADODB.Recordset

Dim sql As String

strDk = "DBQ=" &App.Path &"\a.mdbDriver={Microsoft Access Driver (*.mdb)}"

cnDk.Open strDk

sql = "insert into b (c) values ('" &text1.text&"')"

cnDk.Execute sql

cnDk.Close

Set cnDk = Nothing

End Sub

在数据库中添加多条记录

只要可以进行输入文本的都可以

改一下这些吧，你单击一次就提示输入一次，输完了自动保存

改后

Data1.Recordset.AddNew

Data1.Recordset.Fields("username") = trim(inputbox("请输入名字"))

Data1.Recordset("password") =val(trim(inputbox("请输入电话")))

Data1.UpdateRecord

——————————————————————————————

Data1.Recordset.AddNew

Data1.Recordset.Fields("username") = "张三|"

Data1.Recordset("password") = "fsdfsd"

Data1.UpdateRecord

Data1.Recordset.AddNew

Data1.Recordset.Fields("username") = "李四|"

Data1.Recordset("password") = "fsdf432d"

Data1.UpdateRecord

Data1.Recordset.AddNew

Data1.Recordset.Fields("username") = "王五|"

Data1.Recordset("password") = "f42342d"

Data1.UpdateRecord

MsgBox "adad"

========================================================================================

vb+access 数据库的记录的添加与删除

Dim cn As New ADODB.Connection

Dim rs As New ADODB.Recordset

Private Sub Command2_Click()

Set rs = cn.Execute("select * from wenzhang where 内容='" &Text1.Text &"'")

If Text1.Text = "" Then

MsgBox ("文章不能为空！")

ElseIf rs.EOF = False Then

MsgBox ("文章不能重复！")

Else

cn.Execute ("insert into wenzhang values('" &Combo1.Text &"','" &Text3.Text &"','" &Text4.Text &"','" &

Text1.Text &"')")

MsgBox ("ok")

End If

End Sub

'添加按钮

Private Sub Command3_Click()

Dim myval As String

Set rs = cn.Execute("select * from wenzhang where 内容='" &Text1.Text &"'")

If rs.EOF Then

myval = MsgBox("是否保存文章？", vbInformation + vbYesNoCancel, "提示")

If myval = vbYes Then

cn.Execute ("insert into wenzhang values('" &Combo1.Text &"','" &Text3.Text &"','" &Text4.Text &"','" &

Text1.Text &"')")

MsgBox ("保存成功")

Else

Combo1.Text = ""

End If

Else

Text1.Text = ""

Combo1.Text = ""

End If

End Sub

'删除按钮

Private Sub Command4_Click()

If Text1.Text = "" Then

MsgBox ("不能删除空记录！")

Else

Dim myval As String

myval = MsgBox("是否删除文章？", vbInformation + vbYesNo, "提示")

If myval = vbYes Then

Set rs = cn.Execute("delete from wenzhang where 内容 ='" &Text1.Text &"'")

MsgBox ("删除成功！")

End If

End If

End Sub

'连接数据库

Private Sub Form_Load()

cn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0Data Source=\vb.net\temp.mdbPersist Security Info=False"

cn.CursorLocation = adUseClient

cn.Open

End Sub

楼主多看看sql语言。

我这儿有个范例：

Private Conn As New ADODB.Connection

Private Recordset As New ADODB.Recordset

Private Sub Command1_Click() '增加记录

Dim sql As String

Set Recordset = Nothing

sql = "select * from liuyan" 'SQL查询语句

Recordset.Open sql, Conn, 1, 3

Recordset.AddNew

Recordset("姓名") = Text1.Text '数据读写 *** 作

Recordset("性别") = Text2.Text '数据读写 *** 作

Recordset("年龄") = Text3.Text '数据读写 *** 作

Recordset("权限") = Text4.Text '数据读写 *** 作

Recordset("时间") = Text5.Text '数据读写 *** 作

Recordset("内容") = Text6.Text '数据读写 *** 作

Recordset.Update

Call Command3_Click '刷新

Recordset.Close

End Sub

Private Sub Command3_Click() '显示liuyan表中内容

Dim sql As String, tex As String

Set Recordset = Nothing

sql = "select * from liuyan" 'SQL查询语句

Recordset.Open sql, Conn, 1, 3

Do While Not Recordset.EOF

For i = 1 To Recordset.Fields.Count - 1

If i = Recordset.Fields.Count - 1 Then

tex = tex &Recordset.Fields(i).Name &":" &Recordset.Fields(i).Value &vbNewLine

Else

tex = tex &Recordset.Fields(i).Name &":" &Recordset.Fields(i).Value &Space(15 - Len(Recordset.Fields(i).Value))

End If'输出jsb表中各字段

Next i

Recordset.MoveNext

Loop

'Print Recordset.Fields(2).Type

Text7.Text = tex

End Sub

Private Sub Form_Load()

Conn.Open "Provider=Microsoft.Jet.OLEDB.4.0Data Source=G:\实验平台\数据库\留言板.mdb"

End Sub

1、打开代码窗口，添加引用：Imports System.Data.SqlClient。

2、输入以下代码：

“Public conn1  As SqlConnection = New SqlConnection _

("server=192.168.1.79Initial Catalog= studentUser ID= panqePWD=shentai768@")”，vb就已经成功连接sql数据库了。

3、代码详解：声明关键字Public（因为是全局变量，所以用Public 来声明）。

4、连接参数。

5、如果SQL 数据库就在本机，则用以下代码连接：

("server=.Integrated Security=FalseInitial Catalog= studentUser ID= panqePWD=shentai768@")。

6：如果代码太长，影响可读性，可以用空格加"_"后，回车换行。

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