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DataTableReader.FieldCount Property

Note: This property is new in the .NET Framework version 2.0.

Returns the number of columns in the current row.

Namespace: System.Data
Assembly: System.Data (in

public override int FieldCount { get; 
/** @property */
public int get_FieldCount ()

public override function get FieldCount () : int

Property Value

When not positioned in a valid result set, 0; otherwise the number of columns in the current row.

Exception typeCondition


An attempt was made to retrieve the field count in a closed DataTableReader.

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0

.NET Compact Framework

Supported in: 2.0