FieldCount Property

OleDbDataReader.FieldCount Property

Gets the number of columns in the current row.

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

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

public override function get FieldCount () : int

Not applicable.

Property Value

When not positioned in a valid recordset, 0; otherwise the number of columns in the current record. The default is -1.

Exception typeCondition


There is no current connection to a data source.

Includes hidden fields. Use VisibleFieldCount to exclude hidden fields.

After executing a query that does not return rows, FieldCount returns 0.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, 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, 1.1, 1.0

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