vb.net实例代码之在DropDownList控件中显示访问数据。
代码:
复制代码 代码示例:
<%@ 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
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Displaying Access Data in a DropDownList Control</TITLE>
</HEAD>
<Body LEFTMARGIN="40">
<form runat="server">
<BR><BR>
<asp:dropdownlist
id="ddlEmps"
datatextfield="EmpName"
datavaluefield="ID"
runat="server"
/>
</form>
</BODY>
</HTML>