webform1.aspx.vb

程序源代码分成两个部分： &#61557 一部分是用记事本或EditPlus编写的

Public Class WebForm1
    Inherits System.Web.UI.Page

#Region " Web 窗体设计器生成的代码 "

    '该调用是 Web 窗体设计器所必需的。
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

    End Sub
    Protected WithEvents DropDownList1 As System.Web.UI.WebControls.DropDownList
    Protected WithEvents ListBox1 As System.Web.UI.WebControls.ListBox
    Protected WithEvents Label1 As System.Web.UI.WebControls.Label

    '注意: 以下占位符声明是 Web 窗体设计器所必需的。
    '不要删除或移动它。
    Private designerPlaceholderDeclaration As System.Object

    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: 此方法调用是 Web 窗体设计器所必需的
        '不要使用代码编辑器修改它。
        InitializeComponent()
    End Sub

#End Region

    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ListBox1.Items.Add(New ListItem("HTTP", "HTTP"))
        ListBox1.Items.Add(New ListItem("FTP", "FTP"))
        ListBox1.Items.Add(New ListItem("SMTP", "SMTP"))
        ListBox1.Items.Add(New ListItem("POP3", "POP3"))

    End Sub

    Private Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged
        Dim li As ListItem
        ListBox1.SelectedIndex = DropDownList1.SelectedIndex
        For Each li In ListBox1.Items
            If li.Selected = True Then
                Label1.Text = "您选择了" & li.Text & "项"
            End If
        Next

    End Sub
End Class