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HomeHomeDevelopment and...Development and...Building ExtensionsBuilding ExtensionsModulesModulesWhen Update ControlKey, CanWhen Update ControlKey, Can't Load Module
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4/25/2011 2:30 PM
 
Chad Richardson


Incite-Systems.com
Joined: 3/19/2010
Posts: 170
I add a new module definition and can add it to a page successfully. But if I go in and simply add a value for the Key...I get the following error. Any ideas why?

ModuleId: -1
ModuleDefId: -1
FriendlyName: 
ModuleControlSource: 
AssemblyVersion: 5.6.2
PortalID: 0
PortalName: TheDynoRoom.com
UserID: 29
UserName: chad1
ActiveTabID: 485
ActiveTabName: test
RawURL: /test/tabid/485/portalid/0/Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://dnn_dev/test/tabid/485/portalid/0/Default.aspx
UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.50 Safari/534.24
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: a0130ae2-2c6c-404d-b219-8baf2b8b11b5
InnerException: Object reference not set to an instance of an object.
FileName: 
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Entities.Modules.ModuleController.AddModule
StackTrace: 
Message: DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Entities.Modules.ModuleController.AddModule(ModuleInfo objModule) at DotNetNuke.UI.ControlPanels.ControlPanelBase.AddNewModule(String title, Int32 desktopModuleId, String paneName, Int32 position, ViewPermissionType permissionType, String align) at DotNetNuke.UI.ControlPanels.IconBar.AddModule_Click(Object sender, EventArgs e) in C:\Users\Chad\Documents\Incite Systems\Development\Web Sites\DNN_DEV\Admin\ControlPanel\IconBar.ascx.vb:line 500 --- End of inner exception stack trace ---
 
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4/25/2011 7:52 PM
 
William Severance


www.wesnetdesigns.com
Joined: 2/18/2005
Posts: 3253
Please explain in more detail what you mean by "But if I go in and simply add a value for the Key".

For each module definition there must be one and only one module control which has an empty ControlKey. That module control is considered to be the default control for the definition and wil be the one displayed when browsing to a page containing the module and the parameter "ctl=" is not present in the URL's query string. All of the other module controls of a module definition must have unique (to that definition) ControlKeys.

Usually, if one of the module controls does not have an empty key, the module will not be displayed on the page that it has been added to and no error will be thrown.

Bill, WESNet Designs
Team Lead - DotNetNuke Gallery Module Project (Not Actively Being Developed)
Extensions Forge Projects . . .
Current: UserExport, ContentDeJour, ePrayer, DNN NewsTicker, By Invitation
Coming Soon: FRBO-For Rent By Owner
 
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4/25/2011 9:31 PM
 
Chad Richardson


Incite-Systems.com
Joined: 3/19/2010
Posts: 170
Bill, I really appreciate your reply. This problem was a by-product of the other post that you just responded to (http://www.dotnetnuke.com/Resources/Forums/tabid/795/forumid/203/threadid/416289/scope/posts/Default.aspx) in which I am trying to navigate from one page to the next. So I was testing simply changing the module definition of a control and adding a control key. So the error was related to then navigating to a page with that module on it, but there were no controls that had an empty control key as there is only one control and I gave it a control key value.

I did also experience the issue you mention about "Usually, if one of the module controls does not have an empty key, the module will not be displayed on the page that it has been added to and no error will be thrown."

This clarifies for me the restrictions on use of the control key in a module definition.

Thanks,
Chad
 
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