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SqlDataReader.FieldCount Property

Gets the number of columns in the current row.

Namespace: System.Data.SqlClient
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 row. The default is -1.

Exception typeCondition


There is no current connection to an instance of SQL Server.

Executing a query that, by its nature, does not return rows (such as a DELETE query), sets FieldCount to 0. However. this should not be confused with a query that returns 0 rows (such as SELECT * FROM table WHERE 1 = 2) in which case FieldCount returns the number of columns in the table, including hidden fields. Use VisibleFieldCount to exclude hidden fields.

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, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0