VB操作access数据库
第一次用VB来连接Access数据库,由于不了解VB语法,老是出现bug。现在看来,其实很简单,有好几种方法来连接,包括ADO控件、利用ADO对象等方法。由于ADO控件操作局限性太大,本文采用ADO对象来操作。过程如下: 准备工作: 建立数据库 E:\operation.accdb;
第一次用VB来连接Access数据库,由于不了解VB语法,老是出现bug。现在看来,其实很简单,有好几种方法来连接,包括ADO控件、利用ADO对象等方法。由于ADO控件操作局限性太大,本文采用ADO对象来操作。过程如下:
准备工作: 建立数据库 E:\operation.accdb; 建数据表:selection;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 6.1 Library(注:选择最高版本就行)
1、数据库查询
首先添加控件:添加一个文本框,一个命令按钮
Private Sub Command1_Click() Dim Conn As New ADODB.Connection '创建ADODB对象,用于连接数据库操作 Dim Rs As New ADODB.Recordset '创建ADODB对象,用于返回取得的数据库内容 Conn.Open "Provider=microsoft.ace.oledb.12.0;Data Source=E:\operation.accdb" '连接数据库函数,第一个参数为数据库驱动,第二个参数为数据库路径 sql = "Select Password From select where User='a'" 'selection请换成你的实际数据表名 Rs.Open sql, Conn, 1, 3 '查询数据库,第一个参数为数据库查询语句,第二个参数为数据库连接,第三个和第四个分别为对数据库的操作权限; If Rs.EOF Then MsgBox "没有找到此用户" Else Text1.Text = Rs("Password") End If Conn.close Rs.close End Sub
2、数据插入
首先添加控件:添加两个文本框,一个命令按钮
Private Sub Command1_Click() Dim s1 As String Dim s2 As String Dim Conn As New ADODB.Connection Conn.Open "Provider=microsoft.ace.oledb.12.0;Data Source=E:\operation.accdb" s1 = Text1.Text s2 = Text2.Text sql = "Insert Into selection Values('" & s1 & "','" & s2 & "')" Conn.Execute sql Conn.close End Sub
3、删除数据库中的某个记录
首先添加控件: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 Conn.Open "Provider=microsoft.ace.oledb.12.0;Data Source=E:\operation.accdb" s = Text1.Text sql = "Delete From selection Where User = '" & s & "'" Conn.Execute sql Conn.close End Sub
4、更新数据库某个记录
首先添加控件: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 Conn.Open "Provider=microsoft.ace.oledb.12.0;Data Source=E:\operation.accdb" s = Text1.Text sql = "Update selection Set [Password] = '" & s & "' Where [User] = 'a'" Conn.Execute sql Conn.Close End Sub
总结
首先是建立数据库连接:
Private Sub Command1_Click() Dim Conn As New ADODB.Connection '创建ADODB对象,用于连接数据库操作 Dim Rs As New ADODB.Recordset '创建ADODB对象,用于返回取得的数据库内容 Conn.Open "Provider=microsoft.ace.oledb.12.0;Data Source=E:\operation.accdb" '连接数据库函数,第一个参数为数据库驱动,第二个参数为数据库路径

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