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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
Comment Utility
What problems are you having (exceptions, incorrect results, ...)?
0
 

Author Comment

by:DeMyu
Comment Utility
The generalhelp.aspx is not displaying the content from the database when passed the value of a querystring.
0
 
LVL 96

Accepted Solution

by:
Bob Learned earned 500 total points
Comment Utility
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
Comment Utility
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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