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DataObjectFieldAttribute Constructor (Boolean, Boolean, Boolean, Int32)

Initializes a new instance of the DataObjectFieldAttribute class and indicates whether the field is the primary key for the data row, whether it is a database identity field, and whether it can be null and sets the length of the field.

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

public DataObjectFieldAttribute(
	bool primaryKey,
	bool isIdentity,
	bool isNullable,
	int length
)

Parameters

primaryKey
Type: System.Boolean
true to indicate that the field is in the primary key of the data row; otherwise, false.
isIdentity
Type: System.Boolean
true to indicate that the field is an identity field that uniquely identifies the data row; otherwise, false.
isNullable
Type: System.Boolean
true to indicate that the field can be null in the data store; otherwise, false.
length
Type: System.Int32
The length of the field in bytes.

.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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