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Hi I am having some trouble with my code. I have an ASP radiobuttonlist and want to display contents when there is a item selected. But when I select a radiobutton, and switch back to the old one my content doesn't show up any more.

This is my Asp code full page the javascript in here is commented out so it is not a part of working code.

Before I had ASP radiobuttons I had buttons did worked as pleased but I had to switch to ASP buttons for a reason.

<%@ Page Title="" Language="C#" MasterPageFile="~/Menu.Master" AutoEventWireup="true" CodeBehind="Login.aspx.cs" Inherits="DomoticaProject.Login" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
 <script src="http://code.jquery.com/jquery-latest.min.js"></script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">

<!--
<script type="text/javascript">
 $(function () 
 var radios = document.getElementsById("RadioButtonList1");
 var Login = document.getElementById("lbllogin");
 var Signin = document.getElementById("lblSignup");
 var Reset = document.getElementById("lblReset");
 Login.style.display = 'block'; // show
 Signin.style.display = 'none'; // hide
 Reset.style.display = 'none'; // hide
for(var i = 0; i < radios.Items.Count; i++) 
 radios[i].onclick = function() 
 var val = this.value;
 if (val == 'signin') 
 Login.style.display = 'block';
 Signin.style.display = 'none';
 Reset.style.display = 'none';
 
 else if (val == 'signup') 
 Login.style.display = 'none';
 Signin.style.display = 'block';
 Reset.style.display = 'none';
 
 else if (val == 'reset') 
 Login.style.display = 'none';
 Signin.style.display = 'none';
 Reset.style.display = 'block';
 

 
 
 );
 </script>
 --> 

<style type="text/css">

.Loginform 
 text-align: center;
 position: relative;
 top: 30vh; 


.inlog 
 display: block;
 letter-spacing: 4px;
 padding-top: 30px;
 text-align: center;

.inlog .invoertext 
 display:block;
 color: white;
 cursor: text;
 font-size: 20px;
 line-height: 20px;
 text-transform: uppercase;
 -moz-transform: translateY(-34px);
 -ms-transform: translateY(-34px);
 -webkit-transform: translateY(-34px);
 transform: translateY(-34px);
 transition: all 0.3s;

.inlog .invoertype 
 background-color: transparent;
 border: 0;
 border-bottom: 2px solid white;
 color: white;
 font-size: 36px;
 letter-spacing: -1px;
 outline: 0;
 padding: 5px 20px;
 text-align: center;
 transition: all 0.3s;
 width: 200px;

.inlog .invoertype:focus 
 max-width: 100%;
 width: 400px;

.inlog .invoertype:focus + .invoertext 
 color: whitesmoke;
 font-size: 13px;
 -moz-transform: translateY(-74px);
 -ms-transform: translateY(-74px);
 -webkit-transform: translateY(-74px);
 transform: translateY(-74px);

.inlog .invoertype:valid + .invoertext 
 font-size: 13px;
 -moz-transform: translateY(-74px);
 -ms-transform: translateY(-74px);
 -webkit-transform: translateY(-74px);
 transform: translateY(-74px);






.Navigatieinlog 
 width: 450px;
 height: 30px;
 margin: -185px -225px;
 position: absolute;
 left: 50%;
 top: 45vh;
 display:block;


.alleinput[type=radio]display:none

.lblnavigatie 
 cursor: pointer;
 display: inline-block;
 letter-spacing: 4px;
 padding-top: 30px;
 text-align: center;


.lblnavigatie[for="signin"] margin-right: 20px; 
.lblnavigatie[for="reset"] float: right; 
.lblnavigatie[type=radio]:checked + .lblnavigatie opacity: 1; 



.btn-draw 
 background-color: #333333;
 border: 2px solid white;
 border-radius: 27px;
 color: white;
 cursor: pointer;
 font-size: 20px;
 margin-top: 20px;
 padding: 10px 20px;
 text-transform: uppercase;
 transition: all 200ms;

.btn-draw:hover, .btn-draw:focus 
 background-color: white;
 color: #333333;
 outline: 0;
 transition:0.3s;

.buttonplacement
 display: block;
 letter-spacing: 4px;
 text-align: center;



.Errormsg
 display: block;
 letter-spacing: 4px;
 padding-top: 30px;
 text-align: center;
 font-size:14px;


</style>


<link rel = "stylesheet" href = "style.css">

<!-- Inlog -->

<form runat="server">

 <div>
 <asp:RadioButtonList CssClass="Navigatieinlog" ID="RadioButtonList55" OnSelectedIndexChanged="SelectedButtonChange" runat="server" AutoPostBack="true">
 <asp:ListItem Text="Sign in" Value="signin"></asp:ListItem>
 <asp:ListItem Text="Sign up" Value="signup"></asp:ListItem>
 <asp:ListItem Text="Reset" Value="reset"></asp:ListItem>
 </asp:RadioButtonList>

 <%-- <asp:Button runat="server" OnClick="Unnamed_Click1" Text="check" />--%>
 </div>


 <asp:UpdatePanel runat="server">
 <ContentTemplate>

 <asp:Label runat="server" id="lbllogin" visible="true">
 <label id="Login" class="Loginform">

 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtemailinlog" runat="server"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Email"></asp:Label>
 </label>

 <asp:RequiredFieldValidator
 class="Errormsg"
 runat="server"
 ControlTovalidate="txtemailinlog"
 ErrorMessage="Email is required"
 ForeColor="Red"
 ValidationGroup="Login"
 Display="Dynamic">
 </asp:RequiredFieldValidator>

 <asp:RegularExpressionValidator
 class="Errormsg"
 runat="server"
 ControlToValidate="txtemailinlog"
 ErrorMessage="Voer geldig email adress in" 
 ValidationExpression="^w+([.-]?w+)*@w+([.-]?w+)*(.w2,6)+$" 
 ForeColor="Red"
 ValidationGroup="Login"
 Display="Dynamic">
 </asp:RegularExpressionValidator>

 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtpasswordlogin" runat="server" TextMode="Password"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Password"></asp:Label>
 </label>

 <asp:RequiredFieldValidator
 class="Errormsg"
 runat ="server"
 ControlTovalidate ="txtpasswordlogin"
 ErrorMessage ="Password is required"
 ForeColor="Red"
 ValidationGroup="Login"
 Display="Dynamic">
 </asp:RequiredFieldValidator>

 <label class="buttonplacement">
 <asp:Button ValidationGroup="Login" class="btn-draw" runat="server" Text="Log in" />
 </label>
 </label>
 </asp:Label>
<!-- Signup -->
 <asp:Label runat="server" id="lblSignup" visible="false">
 <label id="Naam" class="Loginform">
 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtNaam" runat="server"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Voornaam"></asp:Label>
 </label>


 </label>

 <asp:RequiredFieldValidator
 class="Errormsg"
 runat="server"
 ControlTovalidate="txtNaam"
 ErrorMessage="Naam is required"
 ForeColor="Red"
 ValidationGroup="Sigin"
 Display="Dynamic">
 </asp:RequiredFieldValidator>

 <asp:RegularExpressionValidator
 class="Errormsg"
 runat="server"
 ControlToValidate="txtNaam"
 ErrorMessage="Voer geldige voornaam in" 
 ValidationExpression="^[a-zA-Z]2,$" 
 ForeColor="Red"
 ValidationGroup="Sigin"
 Display="Dynamic">
 </asp:RegularExpressionValidator>
 </label>


 <label id="Signin" class="Loginform">
 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtemailsignin" runat="server"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Email"></asp:Label>
 </label>

 <asp:RequiredFieldValidator
 class="Errormsg"
 runat="server"
 ControlTovalidate="txtemailsignin"
 ErrorMessage="Email is required"
 ForeColor="Red"
 ValidationGroup="Sigin"
 Display="Dynamic">
 </asp:RequiredFieldValidator>

 <asp:RegularExpressionValidator
 class="Errormsg"
 runat="server"
 ControlToValidate="txtemailsignin"
 ErrorMessage="Voer geldig email adress in" 
 ValidationExpression="^w+([.-]?w+)*@w+([.-]?w+)*(.w2,6)+$" 
 ForeColor="Red"
 ValidationGroup="Sigin"
 Display="Dynamic">
 </asp:RegularExpressionValidator>

 <asp:CustomValidator
 id="Signinemailgebuik"
 class="Errormsg"
 runat="server"
 ErrorMessage="Email is al in gebruik"
 ForeColor="Red"
 ValidationGroup="Sigin"
 Display="Dynamic"
 ></asp:CustomValidator>


 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtPasswordsignin" runat="server" TextMode="Password"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Password"></asp:Label>
 </label>

 <asp:RequiredFieldValidator
 class="Errormsg"
 runat="server"
 ControlTovalidate="txtPasswordsignin"
 ErrorMessage="Password is required"
 ForeColor="Red"
 ValidationGroup="Sigin"
 Display="Dynamic">
 </asp:RequiredFieldValidator>

 <asp:RegularExpressionValidator
 class="Errormsg"
 runat="server"
 ControlToValidate="txtPasswordsignin"
 ErrorMessage="Password does not meet requirements"
 ValidationExpression="^.*(?=.6,)((?=.*[!@#$%^&*()-_=+;:,<.>])1)(?=.*d)((?=.*[a-z])1)((?=.*[A-Z])1).*$" 
 ForeColor="Red"
 ValidationGroup="Sigin"
 Display="Dynamic">
 </asp:RegularExpressionValidator>

 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtpasswordsignrepeat" runat="server" TextMode="Password"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Repeat password">
 </asp:Label>

 </label>

 <asp:RequiredFieldValidator
 class="Errormsg"
 runat="server"
 ControlTovalidate="txtpasswordsignrepeat"
 ErrorMessage="Password is required"
 ValidationGroup="Sigin"
 Display="Dynamic"
 ForeColor="Red">
 </asp:RequiredFieldValidator>

 <asp:CompareValidator
 class="Errormsg"
 runat="server" 
 ControlToValidate="txtpasswordsignrepeat" 
 ControlToCompare="txtPasswordsignin" 
 Type="String" Operator="Equal" 
 ErrorMessage="Password not the same" 
 ForeColor="Red"
 ValidationGroup="Sigin"
 Display="Dynamic"> 
 </asp:CompareValidator>

 </label>

 <label class="buttonplacement">
 <asp:Button ValidationGroup="Sigin" class="btn-draw" runat="server" Text="Sign in" OnClick="Unnamed16_Click" />
 </label>
 </label>
 </asp:Label>
 <!-- Reset -->
<asp:Label runat="server" id="lblReset" visible="false">
 <label id="Reset" class="Loginform">
 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtemailreset" runat="server"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Email"></asp:Label>
 </label>

 <asp:RequiredFieldValidator
 class="Errormsg"
 runat="server"
 ControlTovalidate="txtemailreset"
 ErrorMessage="Email is required"
 ForeColor="Red"
 ValidationGroup="Reset"
 Display="Dynamic">
 </asp:RequiredFieldValidator>

 <asp:RegularExpressionValidator
 class="Errormsg"
 runat="server"
 ControlToValidate="txtemailreset"
 ErrorMessage="Voer geldig email adress in" 
 ValidationExpression="^w+([.-]?w+)*@w+([.-]?w+)*(.w2,6)+$" 
 ForeColor="Red"
 ValidationGroup="Reset"
 Display="Dynamic">
 </asp:RegularExpressionValidator>

 <label class="buttonplacement">
 <asp:Button ValidationGroup="Reset" class="btn-draw" runat="server" Text="Reset" />
 </label>
 </label>
 </asp:Label>

 <asp:ScriptManager ID="ScriptManager1" runat="server">
 </asp:ScriptManager>
 <!--
 <asp:RadioButton OnCheckedChanged="SelectedButtonChange" AutoPostBack="true" CssClass="Navigatieinlog" ID="RadioButton1" GroupName="Radiobtn" Text="Sign in" runat="server" />
 <asp:RadioButton OnCheckedChanged="SelectedButtonChange" AutoPostBack="true" CssClass="Navigatieinlog" ID="RadioButton2" GroupName="Radiobtn" Text="Sign up" runat="server" />
 <asp:RadioButton OnCheckedChanged="SelectedButtonChange" AutoPostBack="true" CssClass="Navigatieinlog" ID="RadioButton3" GroupName="Radiobtn" Text="Reset" runat="server" />

 <asp:RadioButtonList CssClass="Navigatieinlog" ID="RadioButtonList1" OnSelectedIndexChanged="SelectedButtonChange" runat="server" AutoPostBack="true">
 <asp:ListItem Text="Sign in" Value="signin"></asp:ListItem>
 <asp:ListItem Text="Sign up" Value="signup"></asp:ListItem>
 <asp:ListItem Text="Reset" Value="reset"></asp:ListItem>
 </asp:RadioButtonList>
-->



 </ContentTemplate>
</asp:UpdatePanel>
</form>

<!-- Navigatie -->

</asp:Content>

This is my behind code in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
using System.Web.Security;

namespace DomoticaProject

 public partial class Login : System.Web.UI.Page
 



 protected void Page_Load(object sender, EventArgs e)
 

 

 protected void Unnamed16_Click(object sender, EventArgs e)
 
 if (Page.IsValid)
 
 string CS = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
 SqlConnection con = new SqlConnection();
 con.ConnectionString = CS;

 try
 
 SqlCommand cmd = new SqlCommand("RegisterUser", con);
 cmd.CommandType = CommandType.StoredProcedure;

 string EncryptedPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPasswordsignin.Text, "SHA1");

 SqlParameter Naam = new SqlParameter("@Naam", txtNaam.Text);

 SqlParameter Email = new SqlParameter("@Email", txtemailsignin.Text);
 SqlParameter Wachtwoord = new SqlParameter("@Wachtwoord", EncryptedPassword);

 cmd.Parameters.Add(Naam);
 cmd.Parameters.Add(Email);
 cmd.Parameters.Add(Wachtwoord);


 con.Open();
 int ReturnCode = (int)cmd.ExecuteScalar();
 if(ReturnCode == -1)
 
 Signinemailgebuik.IsValid = false; 
 
 
 catch
 

 
 finally
 
 con.Close();
 
 
 

 protected void SelectedButtonChange(object sender, EventArgs e)
 
 if (RadioButtonList55.SelectedIndex > -1)
 
 lbllogin.Visible = false;
 lblSignup.Visible = false;
 lblReset.Visible = false;
 string selected = RadioButtonList55.SelectedItem.Text;
 switch (selected)
 
 case "Sign in":
 lbllogin.Visible = true;
 break;
 case "Sign up":
 lblSignup.Visible = true;
 break;
 case "Reset":
 lblReset.Visible = true;
 break;

 

 
 
 

I think what you need to do is always set each Panel to it's default state before you do the foreach loop. Because ViewState will remember the Visible property of each Panel.

lbllogin.Visible = true;
lblSignup.Visible = true;
lblReset.Visible = true;

if (RadioButtonList1.SelectedValue == "signin")



else if (RadioButtonList1.SelectedValue == "signup")

Please try with this example

protected void SelectedButtonChange(object sender, EventArgs e)

 if (RadioButtonList1.SelectedIndex > -1)
 
 lbllogin.Visible = false;
 lblSignup.Visible = false;
 lblReset.Visible = false;
 string selected = RadioButtonList5.SelectedItem.Value;
 switch (selected)
 
 case "signin":
 lbllogin.Visible = true;
 break;
 case "signup":
 lblSignup.Visible = true;
 break;
 case "reset":
 lblReset.Visible = true;
 break;

 

 

and change your List with this in aspx code

 <asp:RadioButtonList CssClass="Navigatieinlog" ID="RadioButtonList1" OnSelectedIndexChanged="SelectedButtonChange" runat="server" AutoPostBack="true">
 <asp:ListItem Text="Sign in" Value="signin"></asp:ListItem>
 <asp:ListItem Text="Sign up" Value="signup"></asp:ListItem>
 <asp:ListItem Text="Reset" Value="reset"></asp:ListItem>
 </asp:RadioButtonList>

Update
I have change my code to this.. it is working from mine side, just check. and adjust validation etc message from yours.

<form id="form1" runat="server">
 <div>
 <asp:RadioButtonList CssClass="Navigatieinlog" ID="RadioButtonList1" OnSelectedIndexChanged="SelectedButtonChange" runat="server" AutoPostBack="true">
 <asp:ListItem Text="Sign in" Value="signin"></asp:ListItem>
 <asp:ListItem Text="Sign up" Value="signup"></asp:ListItem>
 <asp:ListItem Text="Reset" Value="reset"></asp:ListItem>
 </asp:RadioButtonList>

 <%-- <asp:Button runat="server" OnClick="Unnamed_Click1" Text="check" />--%>
 </div>

 <asp:Label runat="server" id="lbllogin" visible="true">
 <label id="Login" class="Loginform">

 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtemailinlog" runat="server"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Email"></asp:Label>
 </label>

 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtpasswordlogin" runat="server" TextMode="Password"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Password"></asp:Label>
 </label>

 <label class="buttonplacement">
 <asp:Button ValidationGroup="Login" class="btn-draw" runat="server" Text="Log in" />
 </label>
 </label>
 </asp:Label>
 <!-- Signup -->
 <asp:Label runat="server" id="lblSignup" visible="false">
 <label id="Naam" class="Loginform">
 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtNaam" runat="server"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Voornaam"></asp:Label>
 </label>


 </label>


 <label id="Signin" class="Loginform">
 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtemailsignin" runat="server"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Email"></asp:Label>
 </label>

 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtPasswordsignin" runat="server" TextMode="Password"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Password"></asp:Label>
 </label>

 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtpasswordsignrepeat" runat="server" TextMode="Password"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Repeat password">
 </asp:Label>

 </label>

 <label class="buttonplacement">
 <asp:Button ValidationGroup="Sigin" class="btn-draw" runat="server" Text="Sign in" OnClick="Unnamed16_Click" />
 </label>
 </label>
 </asp:Label>
 <!-- Reset -->
 <asp:Label runat="server" id="lblReset" visible="false">
 <label id="Reset" class="Loginform">
 <label class="inlog">
 <asp:TextBox class="invoertype" ID="txtemailreset" runat="server"></asp:TextBox>
 <asp:Label class="invoertext" runat="server" Text="Email"></asp:Label>
 </label>

 <label class="buttonplacement">
 <asp:Button ValidationGroup="Reset" class="btn-draw" runat="server" Text="Reset" />
 </label>
 </label>
 </asp:Label>

</form>