Did you know?

You can add new data types to form and List without changing code of the module.

Hi Stefan,

I followed your blog, to the letter, and when I try to add the Attachment Data Type, I get the following Error when adding columns to an existing form and List Configuration:

Error: is currently unavailable.
DotNetNuke.Services.Exceptions.ModuleLoadException: Value cannot be null. Parameter name: key ---> System.ArgumentNullException: Value cannot be null. Parameter name: key at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument) at System.Collections.Generic.SortedDictionary`2.Add(TKey key, TValue value) at DotNetNuke.Modules.UserDefinedTable.DataType.get_UserDefinedDataTypes() at ASP.desktopmodules_userdefinedtable_configuration_ascx.__DataBinding__control28(Object sender, EventArgs e) at System.Web.UI.Control.OnDataBinding(EventArgs e) at System.Web.UI.WebControls.ListControl.OnDataBinding(EventArgs e) at System.Web.UI.WebControls.ListControl.PerformSelect() at System.Web.UI.WebControls.BaseDataBoundControl.DataBind() at System.Web.UI.Control.DataBindChildren() at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.Control.DataBind() at System.Web.UI.Control.DataBindChildren() at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.Control.DataBind() at System.Web.UI.WebControls.DataGrid.CreateItem(Int32 itemIndex, Int32 dataSourceIndex, ListItemType itemType, Boolean dataBind, Object dataItem, DataGridColumn[] columns, TableRowCollection rows, PagedDataSource pagedDataSource) at System.Web.UI.WebControls.DataGrid.CreateControlHierarchy(Boolean useDataSource) at System.Web.UI.WebControls.BaseDataList.OnDataBinding(EventArgs e) at System.Web.UI.WebControls.BaseDataList.DataBind() at DotNetNuke.Modules.UserDefinedTable.Configuration.BindFields(Boolean blnInsertField) at DotNetNuke.Modules.UserDefinedTable.Configuration.cmdAddField_Click(Object sender, EventArgs e) --- End of inner exception stack trace ---

Any adivce on this? I am using DNN 5.1.1 with F&L 5.02...

OK, this is wierd. If I retry after I get the error above, I get past the error. However, the new attachment type is not listed.

Thanks, again!

Tom

Hi Stefan,

Thanks for the quick response, that fix did the trick! I was able to upload a file successfully. But, and there is always a but, when attempting to view the uploaded file, I get a 404 error:

Thanks for your efforts!!

Tom

 Server Error in '/' Application.

The resource cannot be found.

Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable.  Please review the following URL and make sure that it is spelled correctly.

Requested URL: /DesktopModules/UserDefinedTable/Attachment.ashx