Vibrant discussion about CSLA .NET and using the framework to build great business applications.
Hi,
I need some help with EditableRootListBase class binding issue. I have EmployeeAccountList binded to DataGridView used on a Windows Forms. Then When I change some data and try save then I get an exception: {"Edit level mismatch in AcceptChanges"}
I guess the problem is with the binding, because when I try the same using DevExpress GridControl, then nothing appear and the save is successfully.
I have written a test for try it, you can download from here: http://ge.tt/7w8GW2K/v/0?c
The solution is in VS2010. written in C# and it use CSLA 3.8.4.
The CSLA.dll is include in the folder.
Regards,
You must understand the concept of Bind and Unbind business object and UI.
IE: You cannot call Save on an object that is databound and sequence of Bind/Unbind is also important to get right.
I strongly suggest that you look at the BindingSourceExtensions in CslaContrib: http://cslacontrib.codeplex.com/SourceControl/changeset/view/98444#1623433
IE: Unbind befor call to Save and then rebind before you can show a message dialog (as the DataGridView cannot get its items to show in the UI).
My blog post here about the sequence: http://jonnybekkum.wordpress.com/2009/10/20/forms-databinding-the-magic-sequence-of-binduiunbindui/
I also recommend these documents for Windows Forms:DataBindingFAQDataGridViewFAQ
See attached zip file for updated solution.
Jonny Bekkum, Norway CslaContrib Coordinator
Thanks Jonny, now it looks great.