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HomeHomeDevelopment and...Development and...Building ExtensionsBuilding ExtensionsModulesModulesCorrect Way to Reference Another Table in my DNN Database?Correct Way to Reference Another Table in my DNN Database?
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3/26/2012 6:05 PM
 
Sid Childers

Joined: 1/27/2009
Posts: 135

Hi,

I'm building a module that needs to read records from a separate table in my DNN database.  I've written the following line in my code behind page to call the DNN connection string saved in web.config:

using (System.Data.SqlClient.SqlConnection connection = new System.Data.SqlClient.SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DNN"].ConnectionString))

The corresponding entry in web.config is as follows:

<add name="DNN" connectionString="DataSource = sqlsrv; InitialCatalog = DNN563; IntegratedSecurity = True" providerName="System.Data.SqlClient"/>

When I run the module in my DNN portal, I receive an error.  Event Manager entry is as follows:

Message: DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DNNSharp.Revindex.ViewInvoices.Page_Load(Object sender, EventArgs e) in C:\inetpub\wwwroot\DNN563\DesktopModules\DNNSharp.Revindex\ViewInvoices.ascx.cs:line 46 at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace ---

Am I using the correct connection string format and referencing it correctly from my code behind?  Is the above error being caused by the connection string statement?  How do I remedy this?

Thanks,

Sid
 
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3/27/2012 3:39 AM
 
Sebastian Leupold


Sebastian Leupold's Avatar

Sebastian Leupold's Avatar

Sebastian Leupold's Avatar

Sebastian Leupold's Avatar

www.dnnwerk.de
Joined: 3/8/2004
Posts: 46212
check out the module template in DNN starter kit, which includes a template for data layer as well.
Cheers from Germany,
Sebastian Leupold

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
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