asp.net更新访问数据的例子，代码如下：
<%@ Page Language=VB Debug=true %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.OLEDB" %>
<script runat=server>
Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)
If Not IsPostBack Then
Dim DBConn as OleDbConnection
Dim DBCommand As OleDbDataAdapter
Dim DSPageData as New DataSet
DBConn = New OleDbConnection( _
"PROVIDER=Microsoft.Jet.OLEDB.4.0;" _
& "DATA SOURCE=" _
& Server.MapPath("EmployeeDatabase.mdb;"))
DBCommand = New OleDbDataAdapter _
("Select LastName & ', ' & FirstName " _
& "as EmpName, ID " _
& "From Employee " _
& "Order By LastName, FirstName", DBConn)
DBCommand.Fill(DSPageData, _
"Employee")
ddlEmps.DataSource = _
DSPageData.Tables("Employee").DefaultView
ddlEmps.DataBind()
End If
End Sub
Sub SubmitBtn_Click(Sender As Object, E As EventArgs)
Dim DBConn as OleDbConnection
Dim DBUpdate As New OleDbCommand
DBConn = New OleDbConnection( _
"PROVIDER=Microsoft.Jet.OLEDB.4.0;" _
& "DATA SOURCE=" _
& Server.MapPath("EmployeeDatabase.mdb;"))
DBUpdate.CommandText = "Update Employee Set " _
& "FirstName = '" & txtFirstName.Text & "' Where " _
& "ID = " & ddlEmps.SelectedItem.Value
DBUpdate.Connection = DBConn
DBUpdate.Connection.Open
DBUpdate.ExecuteNonQuery()
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>更新访问数据-www.jb200.com</TITLE>
</HEAD>
<Body LEFTMARGIN="40">
<form runat="server">
选择一个员工信息进行更新：
<BR><BR>
<asp:dropdownlist
id="ddlEmps"
datatextfield="EmpName"
datavaluefield="ID"
runat="server"
/>
<BR><BR>
New First Name:
<BR>
<asp:textbox
id="txtFirstName"
runat="Server"
/>
<BR><BR>
<asp:button
id="butOK"
text=" OK "
onclick="SubmitBtn_Click"
runat="server"
/>
</form>
</BODY>
</HTML>