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DataTableReader.FieldCount Property

Returns the number of columns in the current row.

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

public override int FieldCount { get; }

Property Value

Type: System.Int32
When not positioned in a valid result set, 0; otherwise the number of columns in the current row.

Implements

IDataRecord.FieldCount

ExceptionCondition
InvalidOperationException

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

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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