关于dropdownlist的selectindexchange后页面刷新问题

Question

我做一个页面有一个dropdownlist想要在selectindexchange时
调用自己做的一个控件
该控件中有7个panel 想对应dropdownlist选择不同的value时panel的visable改变，显示想要的panel
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        eval.Pass = DropDownList1.SelectedValue;
        if (DropDownList1.SelectedValue == "SH")
        {
            ((Panel)eval.FindControl("Panel_SH")).Visible = true;
            ((Panel)eval.FindControl("Panel_DB")).Visible = false;
            ((Panel)eval.FindControl("Panel_WS")).Visible = false;
            ((Panel)eval.FindControl("Panel_TC")).Visible = false;
            ((Panel)eval.FindControl("Panel_YX")).Visible = false;
            ((Panel)eval.FindControl("Panel_DD")).Visible = false;
            ((Panel)eval.FindControl("Panel_HP")).Visible = false;
        }
        else if (DropDownList1.SelectedValue == "DB")
        {
            ((Panel)eval.FindControl("Panel_SH")).Visible = false;
            ((Panel)eval.FindControl("Panel_DB")).Visible = true;
            ((Panel)eval.FindControl("Panel_WS")).Visible = false;
            ((Panel)eval.FindControl("Panel_TC")).Visible = false;
            ((Panel)eval.FindControl("Panel_YX")).Visible = false;
            ((Panel)eval.FindControl("Panel_DD")).Visible = false;
            ((Panel)eval.FindControl("Panel_HP")).Visible = false;
        }
        else if (DropDownList1.SelectedValue == "WS")
        {
            ((Panel)eval.FindControl("Panel_SH")).Visible = false;
            ((Panel)eval.FindControl("Panel_DB")).Visible = false;
            ((Panel)eval.FindControl("Panel_WS")).Visible = true;
            ((Panel)eval.FindControl("Panel_TC")).Visible = false;
            ((Panel)eval.FindControl("Panel_YX")).Visible = false;
            ((Panel)eval.FindControl("Panel_DD")).Visible = false;
            ((Panel)eval.FindControl("Panel_HP")).Visible = false;
        }
        else if (DropDownList1.SelectedValue == "TC")
        {
            ((Panel)eval.FindControl("Panel_SH")).Visible = false;
            ((Panel)eval.FindControl("Panel_DB")).Visible = false;
            ((Panel)eval.FindControl("Panel_WS")).Visible = false;
            ((Panel)eval.FindControl("Panel_TC")).Visible = true;
            ((Panel)eval.FindControl("Panel_YX")).Visible = false;
            ((Panel)eval.FindControl("Panel_DD")).Visible = false;
            ((Panel)eval.FindControl("Panel_HP")).Visible = false;
        }
        else if (DropDownList1.SelectedValue == "YX")
        {
            ((Panel)eval.FindControl("Panel_SH")).Visible = false;
            ((Panel)eval.FindControl("Panel_DB")).Visible = false;
            ((Panel)eval.FindControl("Panel_WS")).Visible = false;
            ((Panel)eval.FindControl("Panel_TC")).Visible = false;
            ((Panel)eval.FindControl("Panel_YX")).Visible = true;
            ((Panel)eval.FindControl("Panel_DD")).Visible = false;
            ((Panel)eval.FindControl("Panel_HP")).Visible = false;
        }
        else if (DropDownList1.SelectedValue == "DD")
        {
            ((Panel)eval.FindControl("Panel_SH")).Visible = false;
            ((Panel)eval.FindControl("Panel_DB")).Visible = false;
            ((Panel)eval.FindControl("Panel_WS")).Visible = false;
            ((Panel)eval.FindControl("Panel_TC")).Visible = false;
            ((Panel)eval.FindControl("Panel_YX")).Visible = false;
            ((Panel)eval.FindControl("Panel_DD")).Visible = true;
            ((Panel)eval.FindControl("Panel_HP")).Visible = false;
        }
        else if (DropDownList1.SelectedValue == "HP")
        {
            ((Panel)eval.FindControl("Panel_SH")).Visible = false;
            ((Panel)eval.FindControl("Panel_DB")).Visible = false;
            ((Panel)eval.FindControl("Panel_WS")).Visible = false;
            ((Panel)eval.FindControl("Panel_TC")).Visible = false;
            ((Panel)eval.FindControl("Panel_YX")).Visible = false;
            ((Panel)eval.FindControl("Panel_DD")).Visible = false;
            ((Panel)eval.FindControl("Panel_HP")).Visible = true;
        }    }
代码如上 调试时不起作用，就教高手

Answer 1

如果想局部刷新放入updatepanel里面即可
或者直接在客户端用js来控制。

Answer 2

ICALLBACKHANDLER等接口好象也成地

Answer 3

这个应该用js来完成的
<asp:DropDownList ID="sel_div" onchange="showDiv(this);" runat="server" >
</asp:DropDownList>
<div id="divid">
<div id ="SH" style="display:none;">sh</div>
<div id ="DB" style="display:none;">>DB</div>
<div id ="WS" style="display:none;">>WS</div>
<div id ="TC" style="display:none;">>TC</div>
<div id ="YX" style="display:none;">>YX</div>
<div id ="DD" style="display:none;">>DD</div>
<div id ="HP" style="display:none;">>HP</div> 
</div>.js
function showDiv(obj)
{
var div = obj.value;
var divlist = document.getElementById("divid").getElementsByTagName("div");
for(var i = 0; i < divlist.length; ++i)
{
if(divlist[i].id.indexof(div) == -1)
{
divlist[i].style.display = "none";
}
else
{
divlist[i].style.display = "block";
}
}
}