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ColumnAttribute.CanBeNull Property

Gets or sets whether a column can contain null values.

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

public bool CanBeNull { get; set; }

Property Value

Type: System.Boolean
Default = true.

If you set this value to false, the data in the corresponding column is assumed to be non-null.

NoteNote:

This property is duplicated from the DbType property for convenience. The CreateDatabase method uses only the DbType property. For this reason, you must specify whether a column can contain null values in the DbType property also.

    [Column(Storage="_LastName", DbType="NVarChar(20) NOT NULL", CanBeNull=false)]
	public string LastName
	{
		get
		{
			return this._LastName;
		}
		set
		{
			if ((this._LastName != value))
			{
				this.OnLastNameChanging(value);
				this.SendPropertyChanging();
				this._LastName = value;
				this.SendPropertyChanged("LastName");
				this.OnLastNameChanged();
			}
		}
	}

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.

.NET Framework

Supported in: 3.5

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