6.11.4.53 IsDBNull
This method indicates whether or not the column value is NULL.
Declaration
// C#
public override bool IsDBNull(int index);Parameters
-
indexThe zero-based column index.
Return Value
Returns true if the column is a NULL value; otherwise, returns false.
Implements
IDataRecord
Exceptions
InvalidOperationException - The reader is closed, Read() has not been called, or all rows have been read.
IndexOutOfRangeException - The column index is invalid.
Remarks
This method should be called to check for NULL values before calling the other accessor methods.
Example
The code example for the OracleDataReader class includes the IsDBNull method. See "Example".