And I really do not understand why. I set the BO's AllowNullValuesOnNewRow property to true because From the documentation (even though it sounds a little backwards ):

When True, the NewRow() function will automatically initialze the row to prevent any DBNull values from occurring

In the BO mapper, I also customized the field to return alternate on null - is_primary is a boolean field, so I set the alternate to false.

So I am more than a little mystified that I am getting this error - can someone please help me find a solution?

DataLayerSavingException
  Cannot insert the value NULL into column 'is_primary', table 'TGIF.dbo.Contact'; column does not allow nulls. INSERT fails.
The statement has been terminated.
SqlException
  Cannot insert the value NULL into column 'is_primary', table 'TGIF.dbo.Contact'; column does not allow nulls. INSERT fails.
The statement has been terminated.

Source     : MicroFour StrataFrame Business

Stack Trace:
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
   at System.Data.SqlClient.SqlDataReader.get_MetaData()
   at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
   at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
   at System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior)
   at MicroFour.StrataFrame.Data.DbDataSourceItem.InternalExecuteReader(DbCommand Command, Boolean IsTransactional, String TransactionKey)
   at MicroFour.StrataFrame.Data.SqlDataSourceItem.UpdateRow(QueryInformation QueryInfo, DataRow RowToUpdate, ConcurrencyExceptionHandler ConcurrencyHandler, AddRowErrorHandler RowErrorHandler, Boolean RecreateCommand)
   at MicroFour.StrataFrame.Data.DbDataSourceItem.UpdateRow(QueryInformation QueryInfo, DataRow RowToUpdate, ConcurrencyExceptionHandler ConcurrencyHandler, AddRowErrorHandler RowErrorHandler)
   at MicroFour.StrataFrame.Data.DataLayer.UpdateDataTableThread(Object ThreadParams)
   at MicroFour.StrataFrame.Data.DataLayer.UpdateDataTable(DataTable TableToUpdate, Boolean Transactional, String TransactionKey)
   at MicroFour.StrataFrame.Data.DataLayer.Save(DataTable TableToSave, Boolean Transactional, String TransactionKey)
   at MicroFour.StrataFrame.Business.BusinessLayer.Save(Boolean Transactional, String TransactionKey)
   at MicroFour.StrataFrame.Business.BusinessLayer.Save()
   at TGIF.Forms.Contact.cmdOK_Click(Object sender, EventArgs e) in F:\TGIF\Forms\Contact.cs:line 109
   at System.Windows.Forms.Control.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnClick(EventArgs e)
   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativewindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativewindow.WndProc(Message& m)
   at System.Windows.Forms.Nativewindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

It appears that if you want the BO to initialize your columns with default data based on the data type, you need to set the AllowNullValuesOnNewRow property to false. If it is true, it allows NULLs in the current data table. If false, then it does the initialization. (checked source to figure out what was up).

And as I reread the docs, they appear to be backwards. I.e. based on docs true would initialize, but in source, its obviously false that causes the initialization...

I tried leaving it set to false - same problem. So, I did this in the BO's BeforeSave method and that took care of the problem:

// when all else fails, try a bigger hammer

// kept getting a "column does not accept null values" error

// on save

if (chkis_primary.Checked == false)

    boContact.is_primary = false;

 

A better place would be using the SetDefaultValues event. I typically handle it in the BO and then you don't have to worry about it.