UpdatePanel and panel visibility asp.net c# -

i have 2 panels. each panel contains updatepanel. first panel password textbox.

i set second panel's visibility on page_load false. if user enters correct password, second panel should visible , first panel shouldnd.

the code:

<asp:panel id="passwordpanel" runat="server">       <asp:updatepanel id="updatepanel2" updatemode="conditional" runat="server">       <contenttemplate>            geben sie das passwort ein:<br />           <br />           <asp:textbox id="txtpassword" autopostback="false" runat="server" textmode="password"></asp:textbox>           <br />           <br />           <asp:button id="btnconfirmpassword" runat="server" autopostback="true" text="senden" cssclass="button" onclick="btnconfirmpassword_click"/>       </contenttemplate>       </asp:updatepanel>   </asp:panel>      <asp:panel id="paneluploaddownload" runat="server">     <h2>upload paketformeln csv</h2>      <input type="file" id="myfile" name="myfile" />      <asp:button runat="server" id="btnupload" onclick="btnuploadclick" cssclass="button" text="upload" />     <asp:updatepanel id="updatepanel1" updatemode="conditional" runat="server">         <contenttemplate>              <br />             <asp:label id="lblstatus" runat="server" text="statuslabel"></asp:label>             <br />              <asp:panel id="panelchanges" runat="server" cssclass="pnlcss">                 <asp:label id="lblchangesheader" runat="server" font-bold="true" forecolor="black" text="Änderungen"></asp:label>                 <br />                 <asp:label id="lblchanges" runat="server" forecolor="#009900" text="changes"></asp:label>                 <br />                 <br />                 <asp:button id="btnconfirm" runat="server" onclick="btnconfirm_click" cssclass="button" text="Änderungen bestätigen" />             </asp:panel>         </contenttemplate>     </asp:updatepanel>     <br />     <br />     <br />     <br />       <h2>download paketformeln csv</h2>     <p><asp:button id="btndownloadcsv" runat="server" onclick="btndownloadcsv_click" text="download csv" cssclass="button"/></p>   </asp:panel> 

and c# code:

 protected void btnconfirmpassword_click(object sender, eventargs e)         {             if (txtpassword.text == "xx")             {                 uploaddownloadpanel.visible = true;                 passwordpanel.visible = false;             }         } 

load event

protected void page_load(object sender, eventargs e)     {         maincontroller = new maincontroller();         setstatus("", color.black);         lblchanges.visible = false;         lblchangesheader.visible = false;         btnconfirm.visible = false;         panelchanges.visible = false;         paneluploaddownload.visible = false;       } 

for reason doesnt work. clues? triggers?

the securestring class doesn't allow see value; that's whole point of it. if want able work value entered passwordbox, use password member of passwordbox instead of securepassword member:

 protected void btnconfirmpassword_click(object sender, eventargs e)         {             if (txtpassword.password == "xx")             {                 uploaddownloadpanel.visible = true;                 passwordpanel.visible = false;             }         }