高考问答许君一生by谦少阅读:asp.net DropDownList 问题
来源：百度文库 编辑：高考问答 时间：2024/05/10 23:16:56
<asp:Label ID="Label1" Text="wang" ToolTip="df" runat="server"/>
<asp:Button ID="Button1" Text="button" ToolTip="chick here" OnClick="button1_chick" runat="server" />
<asp:DropDownList id="listbox1" runat="server" AutoPostBack="false" />
</form>
<script language="vb" runat="server">
Sub Page_Load(Src As Object, E As EventArgs)
If Not IsPostBack Then
Dim values as ArrayList= new ArrayList()
values.Add ("汉字1")
values.Add ("free")
values.Add ("汉字2")
values.Add ("123")
listbox1.DataSource = values
listbox1.DataBind()
End If
End Sub
Sub button1_chick(sender As Object, E As EventArgs)
label1.text= listbox1.SelectedItem.value
End Sub
</script>
实现的功能是选择listbox1 点击button1 使label1.text= listbox的内容
问题：选择 汉字1 ,free ,123,可以 但选择汉字2时 label1=汉字1（第一项）
<asp:Button ID="Button1" Text="button" ToolTip="chick here" OnClick="button1_chick" runat="server" />
<asp:DropDownList id="listbox1" runat="server" AutoPostBack="false" />
</form>
<script language="vb" runat="server">
Sub Page_Load(Src As Object, E As EventArgs)
If Not IsPostBack Then
Dim values as ArrayList= new ArrayList()
values.Add ("汉字1")
values.Add ("free")
values.Add ("汉字2")
values.Add ("123")
listbox1.DataSource = values
listbox1.DataBind()
End If
End Sub
Sub button1_chick(sender As Object, E As EventArgs)
label1.text= listbox1.SelectedItem.value
End Sub
</script>
实现的功能是选择listbox1 点击button1 使label1.text= listbox的内容
问题：选择 汉字1 ,free ,123,可以 但选择汉字2时 label1=汉字1（第一项）
程序没有错