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DbDataReader.IsDBNull Method

Gets a value that indicates whether the column contains nonexistent or missing values.

Namespace: System.Data.Common
Assembly: System.Data (in system.data.dll)

public abstract bool IsDBNull (
	int ordinal
)
public abstract boolean IsDBNull (
	int ordinal
)
public abstract function IsDBNull (
	ordinal : int
) : boolean
Not applicable.

Parameters

ordinal

The zero-based column ordinal.

Return Value

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

Call this method to check for null column values before calling the typed get methods (for example, GetByte, GetChar, and so on) to avoid raising an error.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

.NET Compact Framework

Supported in: 2.0

XNA Framework

Supported in: 1.0

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