How to tell whether a column can accept nulls

How can I tell if a column bound to a datatable can accept null values prior to a write to the database
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Ajay SharmaCommented:
Dim colStatus As Boolean
colStatus = dataset1.datacolumn(0).AllowDBNull

Here the colStatus will be storing a boolean value stating the dbnull is allowed or not.

Here i am evaluating the status of first column (0th column).
Replace your column number in he statment instead of "0" .
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