vb.net 如何连接Access数据库

Access数据库连接
采用OleDbConnection对象

代码 1

Private Function getAccessConnection() As OleDbConnection

Dim dbConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|/Resources/mag.mdb;Persist Security Info=true"
Dim dbConnection As OleDbConnection = New OleDbConnection(dbConnectionString)

Try
dbConnection.Open()
Catch Ex As Exception
'MsgBox(Err.Description)
End Try

Return dbConnection

End Function

代码 2

private Sub fillDataGridView()

Dim sqlStr As String = "select * from Table"
Dim DataAdapter As New OleDbDataAdapter
Dim dataSet As New DataSet
Dim DataGridView As New DataGridView
Dim dbConnection As OleDbConnection = getAccessConnection()

If dbConnection.State.ToString = "Closed" Then
MsgBox(Chr(13) & " access 数据库连接失败 " & Chr(13), , "警告")
Exit Sub
End If

DataAdapter.SelectCommand = New OleDbCommand(sqlStr,dbConnection)

Try
DataAdapter.Fill(dataSet,"Table")
DataGridView.DataSource = dataSet.Tables("Table").DefaultView
Catch Ex As Exception
MsgBox(Err.Description)
Finally
dataSet.Dispose
DataAdapter.Dispose
dbConnection.Close
dbConnection.Dispose
End Try

End Sub

PS：
Access数据库文件，可以通过 My Project -> 资源 -> 添加资源 -> 添加现有文件 这样的方式来添加
调试状态下，每次运行项目，Resources下面的数据库将会覆盖Debug下的数据库
有关Excel的连接方式，参考http://blog.csdn.net/SDLin/archive/2008/02/29/2133183.aspx(如何读取Excel文件并赋值给DataGridView对象)
有关数据库操作的方式，参考http://blog.csdn.net/SDLin/archive/2008/02/29/2133016.aspx(数据库如何与DataTable同步)