.net中怎麼用dropdownlist统制div的顯示

2013-07-01

.net中怎麼用dropdownlist控制div的顯示前臺：trtddiv idCf runatserver classhide重複發生

.net中怎麼用dropdownlist控制div的顯示

   
         前臺：     <tr>
                    <td>
                    <div id="Cf" runat="server" class="hide">
                    重複發生在每<asp:DropDownList ID="ddlSc_Cfrc" runat="server" OnSelectedIndexChanged="ddlSc_Cfrc_SelectedIndexChanged">
                    <asp:ListItem>天</asp:ListItem>
                    <asp:ListItem>周</asp:ListItem>
                    <asp:ListItem>月</asp:ListItem>
                        </asp:DropDownList>
                    </div>
                    </td>
                  </tr>

                  <tr >
                    <td>
                    <div id="Cfz" runat="server" style="display:none">
                    <table>
                    <tr>
                    <td>
                        <asp:CheckBoxList ID="Cbl" runat="server" RepeatColumns="7">
                        <asp:ListItem>周日</asp:ListItem>
                        <asp:ListItem>周一</asp:ListItem>
                        <asp:ListItem>周二</asp:ListItem>
                        <asp:ListItem>周三</asp:ListItem>
                        <asp:ListItem>周四</asp:ListItem>
                        <asp:ListItem>周五</asp:ListItem> 
 
                        <asp:ListItem>周六</asp:ListItem>
                        </asp:CheckBoxList>
                        </td>
                        </tr>
                   </table></div>
                  
                  <div id="Cfy" runat="server" style="display:none">
                   <table>
                    <tr>
                     <td>
                      第<asp:TextBox ID="txttime" runat="server"></asp:TextBox>天
                     </td>
                    </tr>
                    </table>
                   </div>

後臺： protected void ddlSc_Cfrc_SelectedIndexChanged(object sender, EventArgs e)
        {
            string str = ddlSc_Cfrc.SelectedIndex.ToString();
            if (str == "1")
            {
                Cfz.Style.Value = "display:''";

            }
            else
            {
                Cfz.Style.Value = "display:none";
            }
        }

問題：怎麼讓ddlSc_Cfrc選擇“周”後使"Cfz"顯示，選擇“天”後使"Cfy"顯示，希望各位多多幫助，謝謝！（SelectedIndexChanged中的方法沒用） dropdownlist ?div??? .NET

[解决办法]
代码应该没问题是否启用了AutoPostBack="True"
[解决办法]
AutoPostBack属性没有设置为true,如果实现这样的功能建议不要后台处理

  <form id="form1" runat="server">
        <script type="text/javascript">
            function changeSelect(obj) {
                alert(obj.value);
                if (obj.value == "周") {
                    document.getElementById("Cfz").style.display = "block";
                    document.getElementById("Cfy").style.display = "none";
                } else if (obj.value == "天") {
                    document.getElementById("Cfz").style.display = "none";
                    document.getElementById("Cfy").style.display = "block";
                }
            }
    </script>
    <asp:DropDownList ID="ddlSc_Cfrc" runat="server" onchange="changeSelect(this)">
        <asp:ListItem>天</asp:ListItem>
        <asp:ListItem>周</asp:ListItem>
        <asp:ListItem>月</asp:ListItem>
    </asp:DropDownList>
        <div id="Cfy"  style="display:none">yyyyyy</div>
        <div id="Cfz" style="display:none">zzzzzzzzz</div>
    </form>

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.net中怎麼用dropdownlist统制div的顯示