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UpdateCheck Enumeration

.NET Framework 4.5

Specifies when objects are to be tested for concurrency conflicts.

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

public enum UpdateCheck

Members

	Member name	Description
	Always	Always check. This is the default unless IsVersion is true for a member.
	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)	LINQ to SQL

Examples

[Column(Storage="_HomePage", DbType="NText", UpdateCheck=UpdateCheck.Never)]
public string HomePage
{
    get
    {
        return this._HomePage;
    }
    set
    {
        if ((this._HomePage != value))
	{
 	    this.OnHomePageChanging(value);
	    this.SendPropertyChanging();
            this._HomePage = value;
	    this.SendPropertyChanged("HomePage");
            this.OnHomePageChanged();
	}
    }
}

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4

Platforms

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.

Reference

System.Data.Linq.Mapping Namespace

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