ColumnAttribute.IsPrimaryKey Property
Gets or sets whether this class member represents a column that is part or all of the primary key of the table.
Namespace: System.Data.Linq.Mapping
Assembly: System.Data.Linq (in System.Data.Linq.dll)
Assuming an entity class, you must provide at least one member with this attribute, and it must be mapped to the primary key or a unique key in the corresponding table or view. Failure to do this prompts LINQ to SQL to consider instances of the class as read-only for submitting changes to the database.
If you designate more than one member of the class by using this property, the key is said to be a composite of the associated columns.
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LINQ to SQL does not support computed columns as primary keys. |
[Column(Storage="_ProductID", AutoSync=AutoSync.OnInsert, DbType="Int NOT NULL IDENTITY", IsPrimaryKey=true, IsDbGenerated=true)] public int ProductID { get { return this._ProductID; } set { if ((this._ProductID != value)) { this.OnProductIDChanging(value); this.SendPropertyChanging(); this._ProductID = value; this.SendPropertyChanged("ProductID"); this.OnProductIDChanged(); } } }
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.
