SqlTriggerAttribute Class

SqlTriggerAttribute Class

 

Used to mark a method definition in an assembly as a trigger in SQL Server. The properties on the attribute reflect the physical attributes used when the type is registered with SQL Server. This class cannot be inherited.

Namespace:   Microsoft.SqlServer.Server
Assembly:  System.Data (in System.Data.dll)

System.Object
  System.Attribute
    Microsoft.SqlServer.Server.SqlTriggerAttribute

[SerializableAttribute]
[AttributeUsageAttribute(AttributeTargets.Method, AllowMultiple = false, 
	Inherited = false)]
public sealed class SqlTriggerAttribute : Attribute

NameDescription
System_CAPS_pubmethodSqlTriggerAttribute()

An attribute on a method definition in an assembly, used to mark the method as a trigger in SQL Server.

NameDescription
System_CAPS_pubpropertyEvent

The type of trigger and what data manipulation language (DML) action activates the trigger.

System_CAPS_pubpropertyName

The name of the trigger.

System_CAPS_pubpropertyTarget

The table to which the trigger applies.

System_CAPS_pubpropertyTypeId

When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)

NameDescription
System_CAPS_pubmethodEquals(Object)

This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)

System_CAPS_pubmethodGetHashCode()

Returns the hash code for this instance.(Inherited from Attribute.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodIsDefaultAttribute()

When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)

System_CAPS_pubmethodMatch(Object)

When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

NameDescription
System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfoCount(UInt32)

Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

See "CLR Triggers" in SQL Server 2005 Books Online for more information on CLR triggers and examples.

The following example shows the SqlTriggerAttribute specifying the name of the trigger, the target table, and the event that will fire the trigger. See SqlTriggerContext for the full trigger example.

[SqlTrigger(Name = @"SalesAudit", Target = "[dbo].[SalesInfo]", Event = "FOR INSERT")]
public static void SalesAudit()
{
   // Get the trigger context.
   SqlTriggerContext triggContext = SqlContext.TriggerContext;

   switch (triggContext.TriggerAction)
   {
      case TriggerAction.Insert:

      // Do something in response to the INSERT.

      break;
   }
}

.NET Framework
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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