vb.net DropDownList控件实例代码 在DropDownList控件中显示访问数据

发布时间:2020-06-09编辑:脚本学堂
本文分享一例vb.net代码,学习在DropDownList控件中显示访问数据的方法,有需要的朋友参考下。

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>