Visual Basic .NET

Re: Building a Web Forum

stlarmon — Mon, 29 Jun 2009 19:28:12 GMT

Forum Repeater is being declared. This is signified by an ID and the appropriate runat server <asp:Repeater ID="ForumRepeater" runat="server">
This seems more like the HTML and The Code Behind not wiring up together.

The Imports statements let you use classes belonging to another Namespace. The Root NameSpace is the NameSpace for your project. You can view your Root NameSpace by Right-Clicking the Project Name in Solution Explorer and Selecting Property Pages. This NameSpace should be the prefix for your inherits statement.

Re: Building a Web Forum

Paulie222 — Wed, 24 Jun 2009 00:38:59 GMT

Actually the book had the inherits=_Default". So I changed that and still nothing happened. I don't really get what you mean in your first statement about the root namespace. According to the dummies book the namespace should have been imported when I called the statements:

Imports System.Web.Configuration
Imports System.Data.SqlClient
Imports System.Data

Does this have to do anything with the Repeater ID="ForumRepeater" not being declared?

Re: Building a Web Forum

abinashpatra — Thu, 18 Jun 2009 11:53:29 GMT

Hello,

I hope you are using asp.net 2.0. In 2.0 When you create Web Page below files are created.

File.aspx

File.aspx.cs

File.aspx.designer.cs

File.aspx.resx

Am refering to the 3rd file. The designer. This contains the declarations for all conrtols. Do you have a declaration like this?

protected global::System.Web.UI.WebControls.repeater ForumRepeater;

Am suspecting this. Also am little more sure on this issue, as you have told that you have copied the content from the book directly.

Just check that and revert.

Re: Building a Web Forum

stlarmon — Wed, 17 Jun 2009 18:37:26 GMT

Usually this will happen if you rename a page and don't change the inherits (Inherits="Forums_Default") to match the Class declaration in the Code behind. However, yours all seem to match, which leads me to believe that you are using a default namespace and not prefexing it in the inherits. There are two ways to fix if that is the issue.

1) Go to the Visual Studio Property Pages for your Web App (Right Click on the Project Name) and delete the text under Root Namespace

2) Prefix your inherits statement with the Root Namespace you're using (if Root Namespace was Test than Inherits="Test.Forums_Default" )

Re: Building a Web Forum

Paulie222 — Tue, 16 Jun 2009 19:16:38 GMT

Isn't the repeater declared in line 13 of the aspx page?

13       <asp:Repeater ID="ForumRepeater" runat="server">

I don't know what you mean by designer file, but I copied the code right out of the book.

And just so I understand, even if I was to declare the ForumRepeater manually would I just put it as:

 Dim ForumRepeater As String

Re: Building a Web Forum

abinashpatra — Tue, 16 Jun 2009 03:27:55 GMT

Hello,

Have you checked the designer file if the declaration is present? Go to the FileName.aspx.designer.cs file and check if the declaration is present or not. Else manually put.

Building a Web Forum

Paulie222 — Tue, 16 Jun 2009 00:48:51 GMT

I have a little bit of trouble figuring out why I am getting these error messages. Here is the error messages and then the code will follow behind it.The code is taken directly out of the book "ASP.NET 2.0 Everyday Applications for DUMMIES". Any help is greatly appreciated. Thank you.

--------------------------------------------------------------------------------line--column--------------

Error    13    Name 'ForumRepeater' is not declared.                                                                                                    37    9
Error    14    Name 'ForumRepeater' is not declared.                                                                                                    39    9
Error    15    Handles clause requires a WithEvents variable defined in the containing type or one of its base types.                                                                                                    45    21

Forums/Default.aspx

1    <%@ Page Title="" Language="VB" MasterPageFile="~/MasterPage.master" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="Forums_Default" %>
2    
3    <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
4        <style type="text/css">
5            .style16
6            {
7                width: 100%;
8            }
9        </style>
10   </asp:Content>
11   <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
12       <table border="0">
13       <asp:Repeater ID="ForumRepeater" runat="server">
14           <ItemTemplate>
15           <tr>
16               <td>
17                   <asp:Label ID="lblForumName" runat="server" Text='<% #Eval ("name") %>'>
18               </td>
19           </tr>
20               <asp:Repeater ID="TopicRepeater" runat="server">
21               <ItemTemplate>
22                   <tr><td>
23                       <asp:LinkButton ID="LinkTopicName" runat="server" Text='<% #Eval ("name")%>' 
24                       PostBackUrl='<% #Eval ("topicid", "Threads.aspx?topic={0}")%>'>
25                       --
26                       <asp:Label ID="lblTopicDesc" runat="server" Text="<% #Eval ("description") %>">
27                   </td></tr>
28               </ItemTemplate>
29               </asp:Repeater>
30           </ItemTemplate>
31       </asp:Repeater>
32       </table>
33   </asp:Content>
34

Forum/Default.aspx.vb

1    Imports System.Web.Configuration
2    Imports System.Data.SqlClient
3    Imports System.Data
4    
5    Partial Class Forums_Default
6        Inherits System.Web.UI.Page
7    
8        Private ds As DataSet
9    
10       Protected Sub Page_Load( _
11               ByVal sender As Object, _
12               ByVal e As System.EventArgs) _
13               Handles Me.Load
14           Dim con As String _
15               = WebConfigurationManager _
16               .ConnectionStrings("ForumConnectionString") _
17               .ConnectionString
18           ds = New DataSet()
19   
20           'fill the Forums table
21           Dim sel As String _
22               = "SELECT [forumid], [name] " _
23               + "FROM Forums " _
24               + "ORDER BY [name]"
25           Dim da As SqlDataAdapter _
26               = New SqlDataAdapter(sel, con)
27           da.Fill(ds, "Forums")
28   
29           'fil the Topics Table
30           sel = "SELECT [forumid], [topicid], " _
31               + "[name], [description] " _
32               + "ORDER BY [name]"
33           da = New SqlDataAdapter(sel, con)
34           da.Fill(ds, "Topics")
35   
36           ' bind the Forum Repeater
37           ForumRepeater.datasource = ds.Tables("Forums") _
38               .DefaultView
39           ForumRepeater.DataBind()
40       End Sub
41   
42       Protected Sub ForumRepeater_ItemDataBound( _
43               ByVal sender As Object, _
44               ByVal e As RepeaterItemEventArgs) _
45               Handles ForumRepeater.ItemDataBound
46           Dim r As Repeater
47           r = e.Item.FindControl("TopicRepeater")
48   
49           Dim drv As DataRowView
50           drv = e.Item.DataItem
51           Dim forumid As String = drv("forumid")
52   
53           Dim dv As DataView
54           dv = ds.Tables("Topics").DefaultView
55           dv.RowFilter = "forumid=" + forumid
56   
57           r.DataSource = dv
58           r.DataBind()
59       End Sub
60   End Class
61