UpdateCheck Enumeration (System.Data.Linq.Mapping)

MSDN Library
.NET Development
.NET Framework 3.5
.NET Framework Class Library
System.Data.Linq.Mapping Namespace

UpdateCheck Enumeration
This page is specific to:.NET Framework Version:3.54.0

.NET Framework Class Library

UpdateCheck Enumeration

Specifies when objects are to be tested for concurrency conflicts.

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

Syntax

C++

JScript

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'Usage

Dim instance As UpdateCheck

'Declaration

Public Enumeration UpdateCheck

Members

	Member name	Description
	Always	Always check.
	Never	Never check.
	WhenChanged	Check only when the object has been changed.

Remarks

The code example after the table specifies that HomePage objects should never be tested.

Topic	Location
Optimistic Concurrency: Overview	LINQ to SQL
Optimistic Concurrency: Overview	LINQ to SQL

Examples

C++

JScript

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<Column(Storage:="_HomePage", DbType:="NText", UpdateCheck:=UpdateCheck.Never)>  _
Public Property HomePage() As String
    Get
        Return Me._HomePage
    End Get
    Set(ByVal value As String)
        If ((Me._HomePage <> value)  _
            = false) Then
        Me.OnHomePageChanging(value)
            Me.SendPropertyChanging
            Me._HomePage = value
            Me.SendPropertyChanged("HomePage")
            Me.OnHomePageChanged
        End If
    End Set
End Property

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

Version Information

.NET Framework

Supported in: 3.5

Reference

System.Data.Linq.Mapping Namespace