Chapter 17-WebPart error

Berdia · May 24th, 2010, 08:15 AM

Hi,

I am working on webparts development using your book. I am on Chapter 17 where you explain how to programatically add dropdown control to the page (C#). I have done everything as it says in the book but I am still getting the error message:

"The type or namespace name 'WebParts' could not be found (are you missing a using directive or an assembly reference?)"

Here is my default.aspx.cs file code:

Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.ComponentModel;

namespace TrainingWebApp
{
    public partial class _Default : System.Web.UI.Page
    {

    

    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
      WebParts.WebPartDisplayMode wpDisplayMode =
     WebPartManager1.SupportedDisplayModes[DropDownList1.SelectedValue.ToString()];
      WebPartManager1.DisplayMode = wpDisplayMode;
    }

    protected void Page_Init(object sender, EventArgs e)
    {
      foreach (WebPartDisplayMode wpMode in 
         WebPartManager1.SupportedDisplayModes)
      {            
            string modeName = wpMode.Name;
            ListItem dd_ListItem = new ListItem(modeName, modeName);
            DropDownList1.Items.Add(dd_ListItem);
      }
    }
}

}

And this is my Default.aspx file:

Code:

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
    CodeBehind="Default.aspx.cs" Inherits="TrainingWebApp._Default" %>
    <%@ Register Src="~/DailyLinks.ascx" TagName="DailyLinks" TagPrefix="uc1" %>

    
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
    <style type="text/css">
        .style1
        {
            width: 100%;
            border-style: solid;
            border-width: 1px;
        }
    </style>
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <h2>
        Welcome
    </h2>
    
    <p>
        Web Parts Page</p>
    <asp:WebPartManager ID="WebPartManager1" runat="server">
    </asp:WebPartManager>
        <div>
     
    <form id="form1" runat="server">
        <asp:WebPartManager ID="Webpartmanager2" Runat="server">
        </asp:WebPartManager>
        <table cellpadding="5" border="1">
            <tr>
                <td colspan="2">
                    <h1>My Web Page</h1>
                    <asp:WebPartZone ID="WebPartZone1" Runat="server" 
                     LayoutOrientation="Horizontal">
                        <ZoneTemplate>
                            <asp:Label ID="Label1" Runat="server" Text="Label" 
                             Title="Welcome to my web page!">
                             Welcome to the page!
                            </asp:Label>
                        </ZoneTemplate>
                    </asp:WebPartZone>
                </td>
                <td valign="top">
                    Select mode:
                    <asp:DropDownList ID="DropDownList1" runat="server" 
                     AutoPostBack="True" 
                     OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">        
                    </asp:DropDownList>
                </td>
            </tr>
            <tr valign="top">
                <td>
                    <asp:WebPartZone ID="WebPartZone2" Runat="server">
                        <ZoneTemplate>
                            <asp:Image ID="Image1" Runat="server" 
                             ImageUrl="~/Images/coin2.jpg" Width="150px" 
                             Title="Tuija at the Museum">
                            </asp:Image>
                            <uc1:DailyLinks ID="DailyLinks1" runat="server" 
                             Title="Daily Links">
                            </uc1:DailyLinks>
                        </ZoneTemplate>
                    </asp:WebPartZone>
                </td>
                <td>
                    <asp:WebPartZone ID="WebPartZone3" Runat="server">
                        <ZoneTemplate>
                            <asp:Calendar ID="Calendar1" Runat="server"
                             Title="Calendar">
                            </asp:Calendar>
                        </ZoneTemplate>
                    </asp:WebPartZone>
                </td>
                <td><!-- Blank for now -->
                </td>
            </tr>
        </table>        
    </form>

        </div>

</asp:Content>

Please let me know what am I doing wrong?

Thank you.