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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: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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