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ASP.NET Context Sensitive Help from the database

Posted on 2009-04-04
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Last Modified: 2012-05-06
I am having problems getting the application documented in this url to work when the help content is stored in a database:

http://aspnet.4guysfromrolla.com/articles/082306-1.aspx

I have attached my code snippet.

Thank you



<%@ Page Language="VB" AutoEventWireup="false" CodeFile="AnotherDemo.aspx.vb" Inherits="AnotherDemo" %>
----- AnotherDemo.aspx
<!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 runat="server">
    <title>Another Context-Sensitive Help Demo</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
               
    </div>
    <div>
        <br />
                         
        <asp:image ID="budget" runat="server" imageurl="images/common/question.gif" />        
        </div>
    </form>
</body>
</html>
 
----- AnotherDemo.aspx.vb
Partial Class AnotherDemo
    Inherits ContextSensitiveHelp
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        AddContextSensitiveHelp(budget, "LongHelp", "generalhelp.aspx?cname=budget", True, 20, 5, 400, 300)
    End Sub
End Class
 
========= generalhelp.aspx
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="GeneralHelp.aspx.vb" Inherits="HelpFiles_GeneralHelp" %>
 
<!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 runat="server">
    <link href="HelpFile.css" rel="stylesheet" type="text/css" />
    <title>General Help</title>
</head>
<body>
    <h1>General Help</h1>    
    <p><asp:Image runat="server" ImageAlign="Right" ImageUrl="~/Images/bookCover.jpg" ID="MyBookCoverImage" BorderColor="Black" BorderWidth="1px" BorderStyle="Solid" Width="100" Height="128" /></p>
    <asp:DataList ID="dtlgalleries"
   BorderStyle="Solid" 
   BorderWidth="1px"  
   runat="server" 
   PagerStyle-Visible="False">
                <ItemTemplate>                                   
                    <%# Eval("Help_Content") %>">                                
                </ItemTemplate>
                <ItemStyle VerticalAlign="Top" />
            </asp:DataList>  
            <asp:SqlDataSource ID="SMGRWEB_DataSource" runat="server"
    ConnectionString="<%$ ConnectionStrings:SITEdbConnectString %>" providername = "<%$ connectionstrings:SITEdbConnectString.ProviderName  %>"
    SelectCommand="dbo.P_SMGRWEB_WEBSITE_Show_Help_Content" SelectCommandType="StoredProcedure">
    <SelectParameters>
        <asp:Parameter Name="ControlName" Type="string" />
    </SelectParameters>
</asp:SqlDataSource> 
 
</body>
</html>
 
========= generalhelp.aspx.vb
Partial Class HelpFiles_GeneralHelp
    Inherits System.Web.UI.Page
 
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
 
 
        SMGRWEB_DataSource.SelectParameters("ControlName").DefaultValue = "budget" 'request.querystring("cname")
    End Sub
 
End Class
 
---- DB
 
CREATE PROCEDURE [dbo].[P_SMGRWEB_WEBSITE_Show_Help_Content]
(
 @ControlName VARCHAR(50)=NULL
)
AS
 
SET NOCOUNT ON
 
SELECT Help_Content FROM dbo.context_help
WHERE ControlName = @ControlName
 
SET NOCOUNT OFF
GO

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Question by:DeMyu
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4 Comments
 
LVL 96

Expert Comment

by:Bob Learned
ID: 24072352
What problems are you having (exceptions, incorrect results, ...)?
0
 

Author Comment

by:DeMyu
ID: 24072959
The generalhelp.aspx is not displaying the content from the database when passed the value of a querystring.
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LVL 96

Accepted Solution

by:
Bob Learned earned 500 total points
ID: 24077066
If you are using a QueryString value as a parameter value for an SqlDataSource, then you should define a different parameter type.

Example:


asp:SqlDataSource ID="ID" runat="server" ConnectionString="connectionString"
    ProviderName="providerName"
    SelectCommand="SELECT [ProductID], [ProductName], [UnitPrice] FROM [Products] WHERE ([CategoryID] = ?)">
    <SelectParameters>
        <asp:QueryStringParameter Type="Int32" 
            Name="CategoryID" 
            QueryStringField="CategoryID" />
    </SelectParameters>
</asp:SqlDataSource> 

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Author Comment

by:DeMyu
ID: 24079320
TheLearnedOne,

Thank you! That resolved my problem plus the datasourceid was not declared in the datalist declaration. <asp:DataList ID="dtlgalleries"
    DataSourceID="SMGRWEB_DataSource"

Thank you again.
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