When you get this Error?...
> We get this error in the following situation.
> When
database object returns
NULL, "
DBNULL", and we try to
typecast the result.
> In the above example, you can see, the
reader["name"] is returning
NULL.
> When we try to
typecast to string, we get this error.
How to resolve this issue?...
> We should check whether the
database object is NULL before typecasting.
> In the above code, we check whether
reader["DBCOLUMN"] is
NULL or not.
> After
DBNULL check, we can
typecast as per our requirement.
>
By this way we can resolve this issue.
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