ASP.NET 3.5 Unleashed Errata: Listing 31.6 and Listing 31.24

 

There are two mistakes in Chapter 31, Using Server-Side ASP.NET AJAX, both related to a last minute change to the ListView control. Microsoft changed the ListView control to require an itemPlaceholder instead of an itemContainer element in its LayoutTemplate. I managed to update the other code samples related to the ListView control in the book, but I neglected to update Chapter 31 (I forgot that I used the ListView control in this chapter).

The correct code for Listing 31.6 is:

 1: <%@ Page Language="C#" %>
 2: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 3: <html xmlns="http://www.w3.org/1999/xhtml">
 4: <head runat="server">
 5:     <title>Nested UpdatePanels</title>
 6:     <style type="text/css">
 7:         fieldset
 8:         {
 9:             padding: 10px;
 10:         }
 11:         .comment
 12:         {
 13:             padding: 10px;
 14:             border: dotted 2px black;
 15:             margin: 10px;
 16:         }
 17:     </style>
 18: </head>
 19: <body>
 20:     <form id="form1" runat="server">
 21:     <div>
 22:     <asp:ScriptManager
 23:         id="sm1"
 24:         Runat="server" />
 25:     Page Time: <%= DateTime.Now.ToString("T") %>
 26:     <br />
 27:     <asp:DropDownList
 28:         id="ddlMovie"
 29:         DataSourceID="srcMovies"
 30:         DataValueField="Id"
 31:         DataTextField="Title"
 32:         AutoPostBack="true"
 33:         Runat="server" />
 34:     <asp:SqlDataSource
 35:         id="srcMovies"
 36:         ConnectionString='<%$ ConnectionStrings:con %>'
 37:         SelectCommand="SELECT Id, Title FROM Movie"
 38:         Runat="server" />
 39:     <br /><br />
 40:     <asp:UpdatePanel ID="upOuter" UpdateMode="Conditional" runat="server">
 41:     <Triggers>
 42:         <asp:AsyncPostBackTrigger ControlID="ddlMovie" />
 43:     </Triggers>
 44:     <ContentTemplate>
 45:     Outer UpdatePanel Time: <%= DateTime.Now.ToString("T") %>
 46:     <br />
 47:     <asp:FormView
 48:         id="frmMovie"
 49:         DataSourceID="srcMovie"
 50:         Runat="server">
 51:         <ItemTemplate>
 52:         <fieldset>
 53:         <legend>Movie</legend>
 54:         Title: <%# Eval("Title") %>
 55:         <br />
 56:         Director: <%# Eval("Director") %>
 57: 
 58:         <asp:UpdatePanel ID="upInner" runat="server">
 59:         <ContentTemplate>
 60:         <asp:ListView
 61:             id="lstMovieComments"
 62:             DataSourceID="srcMovieComments"
 63:             InsertItemPosition="FirstItem"
 64:             Runat="server">
 65:             <LayoutTemplate>
 66:                 <fieldset>
 67:                 <legend>Comments</legend>
 68:                 Inner UpdatePanel Time: <%# DateTime.Now.ToString("T") %>
 69:                 <asp:PlaceHolder id="itemPlaceHolder" runat="server" />
 70:             </fieldset>
 71:             </LayoutTemplate>
 72:             <ItemTemplate>
 73:                 <div class="comment">
 74:                 <%# Eval("Comment") %>
 75:                 </div>
 76:             </ItemTemplate>
 77:             <InsertItemTemplate>
 78:             <asp:Label
 79:                 id="lblComment"
 80:                 Text="Comment:"
 81:                 AssociatedControlID="txtComment"
 82:                 Runat="server" />
 83:             <br />
 84:             <asp:TextBox
 85:                 id="txtComment"
 86:                 Text='<%# Bind("Comment") %>'
 87:                 TextMode="MultiLine"
 88:                 Columns="40"
 89:                 Rows="3"
 90:                 Runat="server" />
 91:             <br />
 92:             <asp:Button
 93:                 id="btnInsert"
 94:                 Text="Add Comment"
 95:                 CommandName="Insert"
 96:                 Runat="server" />
 97:             </InsertItemTemplate>
 98:         </asp:ListView>
 99:         </ContentTemplate>
 100:         </asp:UpdatePanel>
 101:         <asp:SqlDataSource
 102:             id="srcMovieComments"
 103:             ConnectionString='<%$ ConnectionStrings:con %>'
 104:             SelectCommand="SELECT Id, Comment 
 105:                 FROM MovieComment
 106:                 WHERE Movi[email protected]"
 107:             InsertCommand="INSERT MovieComment (Comment,MovieId)
 108:                 VALUES (@Comment,@MovieId)"
 109:             Runat="server">
 110:             <SelectParameters>
 111:                 <asp:ControlParameter Name="MovieId" ControlID="ddlMovie" />
 112:             </SelectParameters>
 113:             <InsertParameters>
 114:                 <asp:ControlParameter Name="MovieId" ControlID="ddlMovie" />
 115:             </InsertParameters>
 116:         </asp:SqlDataSource>
 117:         </fieldset>
 118:         </ItemTemplate>
 119:     </asp:FormView>
 120:     </ContentTemplate>
 121:     </asp:UpdatePanel>
 122:     <asp:SqlDataSource
 123:         id="srcMovie"
 124:         ConnectionString='<%$ ConnectionStrings:con %>'
 125:         SelectCommand="SELECT Id, Title, Director 
 126:             FROM Movie
 127:             WHERE [email protected]"
 128:         Runat="server">
 129:         <SelectParameters>
 130:             <asp:ControlParameter Name="Id" ControlID="ddlMovie" />
 131:         </SelectParameters>
 132:     </asp:SqlDataSource>
 133:     </div>
 134:     </form>
 135: </body>
 136: </html>

Notice that I also updated the way that the current time is displayed for this code sample. I changed:

Inner UpdatePanel Time: <%= DateTime.Now.ToString(“T”) %>

To:

Inner UpdatePanel Time: <%# DateTime.Now.ToString(“T”) %>

The correct code for Listing 31.24 is:

 1: <%@ Page Language="C#" %>
 2: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 3: <html xmlns="http://www.w3.org/1999/xhtml">
 4: <head runat="server">
 5:     <title>Timer Messages</title>
 6:     <style type="text/css">
 7:     .message
 8:     {
 9:         margin-left: 20px;
 10:         font-style:italic;
 11:     }
 12:     </style>
 13: </head>
 14: <body>
 15:     <form id="form1" runat="server">
 16:     <asp:ScriptManager ID="sm1" runat="server" />
 17:     <asp:Timer ID="Timer1" Interval="5000" runat="server" />
 18:     <asp:UpdatePanel ID="up1" runat="server">
 19:     <Triggers>
 20:         <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
 21:     </Triggers>
 22:     <ContentTemplate>
 23:     Last Refresh <%= DateTime.Now.ToString("T") %>
 24:     <hr />
 25:     <asp:ListView
 26:         id="lstMessages"
 27:         DataSourceID="srcMessages"
 28:         Runat="server">
 29:         <LayoutTemplate>
 30:             <asp:Placeholder id="itemPlaceholder" runat="server" />
 31:         </LayoutTemplate>
 32:         <ItemTemplate>
 33:             <div>
 34:                 Posted by <%# Eval("PostedBy") %>
 35:                 <div class="message">
 36:                 <%# Eval("Post") %>
 37:                 </div>
 38:             </div>
 39:         </ItemTemplate>
 40:     </asp:ListView>
 41:     </ContentTemplate>
 42:     </asp:UpdatePanel>
 43:     <asp:ObjectDataSource
 44:         id="srcMessages"
 45:         TypeName="Message"
 46:         SelectMethod="Select"
 47:         Runat="server" />
 48:     </form>
 49: </body>
 50: </html>

Thank you Nikolay for pointing out these errors.

Discussion

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