I am using VS2005 C# ASP.NET.
I have a .aspx page with a script for user user membership management.
However, when I tried to implement Masterpage to my .aspx page, I received an error which says
Content controls have to be top-level controls in a content page or a nested master page that references a master page.
I have correctly referenced to my masterpage and I do not know where have I gone wrong.
Need help in pointing out where have I gone wrong in my .aspx page.
Thank you
Below is my code for my .aspx and masterpage:
.ASPX:
<%@ Page Language="C#" MasterPageFile="~/MainPage.master"%>
<%@ Import Namespace="System.Web.Security" %>
<%@ Import Namespace="System.Web.UI" %>
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" >
<script Runat="Server">
string[] rolesArray;
MembershipUserCollection users;
string[] usersInRole;
public void Page_Load()
{
Msg.Text = "";
if (!IsPostBack)
{
// Bind roles to ListBox.
rolesArray = Roles.GetAllRoles();
RolesListBox.DataSource = rolesArray;
RolesListBox.DataBind();
// Bind users to ListBox.
users = Membership.GetAllUsers();
UsersListBox.DataSource = users;
UsersListBox.DataBind();
}
if (RolesListBox.SelectedItem != null)
{
// Show users in role. Bind user list to GridView.
usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
UsersInRoleGrid.DataSource = usersInRole;
UsersInRoleGrid.DataBind();
}
}
public void AddUsers_OnClick(object sender, EventArgs args)
{
// Verify that a role is selected.
if (RolesListBox.SelectedItem == null)
{
Msg.Text = "Please select a role.";
return;
}
// Verify that at least one user is selected.
if (UsersListBox.SelectedItem == null)
{
Msg.Text = "Please select one or more users.";
return;
}
// Create list of users to be added to the selected role.
string[] newusers = new string[UsersListBox.GetSelectedIndices().Length];
for (int i = 0; i < newusers.Length; i++)
{
newusers[i] = UsersListBox.Items[UsersListBox.GetSelectedIndices()[i]].Value;
}
// Add the users to the selected role.
try
{
Roles.AddUsersToRole(newusers, RolesListBox.SelectedItem.Value);
// Re-bind users in role to GridView.
usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
UsersInRoleGrid.DataSource = usersInRole;
UsersInRoleGrid.DataBind();
Msg.Text = "User(s) added to role: " + RolesListBox.SelectedItem.Text;
return;
}
catch (Exception e)
{
Msg.Text = e.Message;
}
}
public void UsersInRoleGrid_RemoveFromRole(object sender, GridViewCommandEventArgs args)
{
// Get the selected user name to remove.
int index = Convert.ToInt32(args.CommandArgument);
string username = ((DataBoundLiteralControl)UsersInRoleGrid.Rows[index].Cells[0].Controls[0]).Text;
// Remove the user from the selected role.
try
{
Roles.RemoveUserFromRole(username, RolesListBox.SelectedItem.Value);
}
catch (Exception e)
{
Msg.Text = "An exception of type " + e.GetType().ToString() +
" was encountered removing the user from the role.";
}
// Re-bind users in role to GridView.
usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
UsersInRoleGrid.DataSource = usersInRole;
UsersInRoleGrid.DataBind();
Msg.Text = "User(s) removed from role: " + RolesListBox.SelectedItem.Text;
return;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Role Membership</title>
</head>
<body>
<form runat="server" id="PageForm">
<font face="helvetica" size="6" color="#455c75"><strong>Role Membership</strong></font><font face="helvetica" size="5" color="#455c75"><strong> Management</strong></font><br /><asp:Label ID="Msg" ForeColor="maroon" runat="server" /><br />
<br />
<table cellpadding="3" border="0">
<tr>
<td valign="top" style="width: 117px; height: 145px;">
<font face="helvetica" size="3" color="#455c75"><strong>Roles:</strong></font></td>
<td valign="top" style="height: 145px; width: 265px;">
<asp:ListBox ID="RolesListBox" runat="server" Rows="8" AutoPostBack="true" /></td>
<td valign="top" style="height: 145px">
<font face="helvetica" size="3" color="#455c75"><strong>Users:</strong></font></td>
<td valign="top" style="height: 145px">
<asp:ListBox ID="UsersListBox" DataTextField="Username" Rows="8" SelectionMode="Multiple"
runat="server" />
<br />
<asp:Button Text="Add User(s) to Role" ID="AddUsersButton" runat="server" OnClick="AddUsers_OnClick" /></td>
<td valign="top" style="height: 145px">
</td>
</tr>
<tr>
<td valign="top" style="width: 117px">
<font face="helvetica" size="3" color="#455c75"><strong>Users in Role:</strong></font></td>
<td valign="top" style="width: 265px">
<asp:GridView runat="server" CellPadding="4" ID="UsersInRoleGrid" AutoGenerateColumns="False"
GridLines="Horizontal" OnRowCommand="UsersInRoleGrid_RemoveFromRole" ForeColor="#333333">
<HeaderStyle BackColor="#5D7B9D" ForeColor="White" Font-Bold="True" />
<Columns>
<asp:TemplateField HeaderText="User Name" >
<ItemTemplate>
<%# Container.DataItem.ToString() %>
</ItemTemplate>
</asp:TemplateField>
<asp:ButtonField Text="Remove From Role" />
</Columns>
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<EditRowStyle BackColor="#999999" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>
</td>
</tr>
</table>
</form>
</body>
</html>
</asp:Content>
Masterpage:
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MainPage.master.cs" Inherits="MainPage" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>RM</title>
<link href="Styles.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="wrapper">
<form id="form1" runat="server">
<div id="header" style="height: 2.7em">
<span class="title">Role Management</span>
<span class="breadcrumb">
<asp:SiteMapPath ID="SiteMapPath1" runat="server">
</asp:SiteMapPath>
</span>
</div>
<div id="content">
<asp:contentplaceholder id="MainContent"
runat="server">
<!-- Page-specific content will go here... -->
</asp:contentplaceholder>
<br />
</div>
<div id="navigation" style="top: 4.19em; left: 0.51em;">
<asp:Panel ID="Panel1" runat="server" Height="50px" Width="260px">
<font size="2">You are logged in as </font>
<asp:LoginName ID="LoginName1" runat="server" Font-Bold="False" Font-Underline="False" ForeColor="RoyalBlue" Font-Italic="False" />
<br />
<asp:LinkButton ID="Logout" runat="server" Font-Bold="True" Font-Underline="True"
OnClick="Logout_Click" Font-Size="Smaller" ToolTip="Logout">Logout</asp:LinkButton></asp:Panel>
<ul>
<li>
<asp:HyperLink runat="server" ID="lnkHome"
NavigateUrl="/SoD/Common/Default.aspx">Home</asp:HyperLink>
<asp:Repeater runat="server" ID="menu" DataSourceID="SiteMapDataSource1" EnableViewState="False">
<ItemTemplate>
<li>
<asp:HyperLink ID="HyperLink1" runat="server"
NavigateUrl='<%# Eval("Url") %>'>
<%# Eval("Title") %></asp:HyperLink>
<asp:Repeater ID="Repeater1" runat="server"
DataSource='<%# ((SiteMapNode) Container.DataItem).ChildNodes %>'>
<HeaderTemplate>
<ul>
</HeaderTemplate>
<ItemTemplate>
<li>
<asp:HyperLink ID="HyperLink2" runat="server"
NavigateUrl='<%# Eval("Url") %>'>
<%# Eval("Title") %></asp:HyperLink>
</li>
</ItemTemplate>
<FooterTemplate>
</ul>
</FooterTemplate>
</asp:Repeater>
</li>
</ItemTemplate>
</asp:Repeater>
</li>
</ul>
</div>
<asp:SiteMapDataSource ID="SiteMapDataSource1"
runat="server" ShowStartingNode="false" />
</form>
</div>
</body>
</html>
The
<asp:Content>misses runat=”server”One more thing remove the following tags from the .aspx file
<head>,<form>,<body>, and<html>because these tags are inherited from the Master Page