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Troubleshooting using WinGrid with BindingNavigator

Scenario: I have a form with one grid, one tableAdapter, one bindingSource and one bindingNavigator. I simply drag and drop the controls in the form, and I assigned the DataSource of this grid to the bindingSource.

The last column of my grid is a string field, that do not allow null values.

I fill al the fields of one row, I typed a value in the last column but it has still the focus.

I click "Add new" button of the Navigator bar, and I receive an error: "Field xxxx do not allow null values".

is there a way to use bindingNavigator without changing the std. functionallity, or must I write a handle for every action Add, Save, etc... ?


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