ColumnAttribute Class
Associates a class with a column in a database table.
System.Object
System.Attribute
System.Data.Linq.Mapping.DataAttribute
System.Data.Linq.Mapping.ColumnAttribute
System.Attribute
System.Data.Linq.Mapping.DataAttribute
System.Data.Linq.Mapping.ColumnAttribute
Assembly: System.Data.Linq (in System.Data.Linq.dll)
The ColumnAttribute type exposes the following members.
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AutoSync | Gets or sets the AutoSync enumeration. |
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CanBeNull | Gets or sets whether a column can contain null values. |
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DbType | Gets or sets the type of the database column. |
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Expression | Gets or sets whether a column is a computed column in a database. |
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IsDbGenerated | Gets or sets whether a column contains values that the database auto-generates. |
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IsDiscriminator | Gets or sets whether a column contains a discriminator value for a LINQ to SQL inheritance hierarchy. |
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IsPrimaryKey | Gets or sets whether this class member represents a column that is part or all of the primary key of the table. |
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IsVersion | Gets or sets whether the column type of the member is a database timestamp or version number. |
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Name | Gets or sets the name of a column. (Inherited from DataAttribute.) |
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Storage | Gets or sets a private storage field to hold the value from a column. (Inherited from DataAttribute.) |
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TypeId | When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.) |
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UpdateCheck | Gets or sets how LINQ to SQL approaches the detection of optimistic concurrency conflicts. |
| Name | Description | |
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Equals | Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.) |
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Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
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GetHashCode | Returns the hash code for this instance. (Inherited from Attribute.) |
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GetType | Gets the Type of the current instance. (Inherited from Object.) |
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IsDefaultAttribute | When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.) |
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Match | When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.) |
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MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
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ToString | Returns a string that represents the current object. (Inherited from Object.) |
| Name | Description | |
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_Attribute.GetIDsOfNames | Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.) |
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_Attribute.GetTypeInfo | Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.) |
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_Attribute.GetTypeInfoCount | Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.) |
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_Attribute.Invoke | Provides access to properties and methods exposed by an object. (Inherited from Attribute.) |
Use this attribute to designate a member of an entity class to represent a column in a database table. You can apply this attribute to any field or property that is public, private, or internal.
Only those entity class members identified as columns are persisted when LINQ to SQL saves changes to the database.
Use commas to separate multiple properties on the attribute.
[Table(Name="Employees")] public class Employees { private string _LastName; // … [Column(Storage="_LastName", DbType="NVarChar(20) NOT NULL", CanBeNull=false)] public string LastName { get { return this._LastName; } set { if ((this._LastName != value)) { this.OnPropertyChanging("LastName"); this._LastName = value; this.OnPropertyChanged("LastName"); } } } }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, 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.
