DropDownList 事件

前台添加了DropDownList 以后, ListItem设置完成以后,

想添加事件SelectedIndexChanged,如果没有在前台设置属性 AutoPostBack="true",事件是不能触发的.

下面是我 修改成功的例子:

前台代码:

    <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true" >                                   
                                    <asp:ListItem Value="未导" Text="未导" Selected="True"></asp:ListItem>
                                    <asp:ListItem Value="已导" Text="已导"></asp:ListItem>
      </asp:DropDownList>

后台事件代码:

Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged
            Twhere = " left(AJBS,6) ='" & DepID & "' and  AJBS like '%" & txtajbh.Text.Trim & "%' and AJMC like '%"           &      txtxm.Text.Trim & "%' and sfdr ='" & DropDownList1.SelectedValue.ToString() & "' "
            DataBind()
        End Sub