DataGrid and ObjectDataSource passes value to Update but not to Delete

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Hi,

I have set up a DataGrid and bound it to an ObjectDataSource. I have set the DataObjectTypeName property of the ObjectDataSource, so it expects to bind to the business object it is manipulating.

The Update works fine. When I click Delete, however, the corresponding method in the business logic layer is called, but all the fields are empty. I am clearly missing something obvious, but I don't seem to be doing anything different to all the examples I have read.

Does anyone have any idea what I might be doing wrong?

Kind wishes ~ Patrick

Posted 24-Mar-14 9:32am

Patrick Skelton

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Patrick Skelton · Answer 1 · 2014-03-24T10:09:00

Solved this one. It seems I needed to set the DataKeyNames property.

So, I can now do 3 of the 4 CRUD operations. I thought I was home and dry, but now I can't figure out how to add a new record from a DataGrid. Am I correct in thinking that you somehow need to enable an empty row at the end of the DataGrid, so you have somewhere to enter the values for the new record?

I tried doing it by having some separate text boxes on the screen, in which to enter the fields for the new record, but I can't figure out how to get these into the InsertMethod of the ObjectDataSource. I thought I could do this programmatically by creating parameters and adding them to the InsertParameters collection, but I was surprised to find that the Parameter class doesn't seem to have a property to set its value. How do I get a value into it?

Arghhh... I'm going mad with this. Every tutorial I read seems to have some key piece of information missing. Please help!

Kind wishes ~ Patrick