DbDataReader.IsDBNull(Int32) DbDataReader.IsDBNull(Int32) DbDataReader.IsDBNull(Int32) DbDataReader.IsDBNull(Int32) Method

Definition

When overridden in a derived class, gets a value that indicates whether the column contains nonexistent or missing values.

public:
 abstract bool IsDBNull(int ordinal);
public abstract bool IsDBNull (int ordinal);
abstract member IsDBNull : int -> bool
Public MustOverride Function IsDBNull (ordinal As Integer) As Boolean

Parameters

ordinal
Int32 Int32 Int32 Int32

The zero-based column ordinal.

Returns

true if the specified column is equivalent to DBNull; otherwise, false.

Implements

Exceptions

Remarks

Call this method to check for null column values before calling the typed Get_*_ methods (for example, GetByte, GetChar, and so on) to avoid throwing an exception.

Applies to

See also