dbreader class : IsDBNull(int) method

Description

Returns a value that indicates whether the value is null.

instance.IsDBNull(int columnIndex)

Class	Name	Description
int	columnIndex	Column index.

Class	Description
bool	Whether the value is null.

1:	connection cnn = new connection("Data Source=c:\somedirectory\somedatabase.sqlite3;Version=3;");
2:	cnn.Open();
3:	command cmm = new command("select * from sometable where id < 100;", cnn);
4:	dbreader dbr = cmm.Reader(); // Command execution. Returns multi-line results.
5:	while(dbr.Read())
6:	bool isnull = dbr.IsDBNull(0);
7:	endwhile
8:	dbr.Release();
9:	cmm.Release();
10:	cnn.Close();
11:	cnn.Release();

Returns true if the specified column is null. Otherwise, returns false.

The argument should specify in a 0-based index.

If the column corresponding to the argument does not exist, an exception, UnknownException, will be thrown.

None.