Question

I have some DataGridViews each displaying one DataTable from a DataSet with multiple DataTables.

When adding a new row to a DataGridView and saving it to the DataSet, bool columns have a System.DBNull-Value which causes an exception later (when reading the DataSet in an other application).

Only if the checkboxes in my bool column are checked and then unchecked, it has a valid value of false when saving the DataSet.

How can I ensure, that checkbox columns always have a default value of false when adding them to my DataGridView or saving them?

Answer 1

In the DataSet designer you can select a DataTable column and set AllowDBNull to false and DefaultValue to False. This way the value will be false rather than DBNull.