Article
02/08/2012

DacType Class

The DacType class represents the set of data-tier objects, policies, and properties developed and deployed to support a specific application.

Inheritance Hierarchy

System.Object
Microsoft.SqlServer.Management.Dac.DacType

Namespace: Microsoft.SqlServer.Management.Dac
Assembly: Microsoft.SqlServer.Management.Dac (in Microsoft.SqlServer.Management.Dac.dll)

Syntax

'Declaration
Public Class DacType _
    Implements IXmlSerializable
'Usage
Dim instance As DacType

public class DacType : IXmlSerializable

public ref class DacType : IXmlSerializable

type DacType =  
    class
        interface IXmlSerializable
    end

public class DacType implements IXmlSerializable

The DacType type exposes the following members.

Constructors

	Name	Description
	DacType()	Intializes a default DacType object.
	DacType(IServer, String, Version, String, Policy, MiscellaneousFilesCollection)	Initializes a new instance of the DacType class with the specified definition, name, version, description, server selection policy, and set of miscellaneous files.

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Properties

	Name	Description
	Definition	Gets an IServer object that represents a graph of the elements in the DAC type.
	Description	Gets a String that describes the DAC type.
	MiscellaneousFiles	Gets an enumerator that iterates through the miscellaneous files associated with the DAC type.
	Name	Gets the application name of the DAC type.
	TargetSelectionPolicy	Gets the server selection policy that defines the requirements an instance of the Database Engine should meet in order to host the DAC type.
	Version	Gets the version of the DAC type.

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Methods

	Name	Description
	Equals	(Inherited from Object.)
	Finalize	(Inherited from Object.)
	GetHashCode	(Inherited from Object.)
	GetType	(Inherited from Object.)
	Load(Stream)	Deserializes the input from a Stream object pointing to a saved DAC type into a DacType object.
	Load(Stream, Boolean)	Deserializes the input from a Stream object pointing to a saved DAC type into a DacType object, with the option for loading elements other than the DAC type metadata.
	MemberwiseClone	(Inherited from Object.)
	Save	Serializes the contents of a DacType object into an XML stream that is sent to the specified Stream object.
	ToString	(Inherited from Object.)
	Unpack	Unpacks a DAC type into the specified folder.
	ValidateDescription	Verifies that the description of the DAC type does not exceed the maximum length.
	ValidateName	Verifies that the application name of the DAC type is not null and does not exceed the maximum length.
	ValidateTargetSelectionPolicy	Verifies that the server selection policy for the DAC type is valid.

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Fields

	Name	Description
	PostDeploymentScriptName	The post-deployment script name.
	PreDeploymentScriptName	The pre-deployment script name.

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Explicit Interface Implementations

	Name	Description
	IXmlSerializable.GetSchema	Not implemented.
	IXmlSerializable.ReadXml	Deserializes the DAC type properties from an XML stream. Identified for informational purposes only. Not supported. Future compatibility is not guaranteed..
	IXmlSerializable.WriteXml	Serializes the DAC type properties to an XML stream. Identified for informational purposes only. Not supported. Future compatibility is not guaranteed..

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Remarks

The data-tier application (DAC) type defines the data-tier objects used by an application. It defines instance-level objects such as logins and database objects, such as tables and stored procedures. The type contains a server selection policy that specifies the requirements an instance of the SQL Server Database Engine should meet in order to host the DAC. The type also contains miscellaneous files, such as pre- and post-deployment scripts.

A DAC type is developed in two ways. It is typically authored by using a DAC project in Microsoft Visual Studio. It can also be extracted from an existing database. The DAC type is built into a DAC package, which is an XML manifest of all the elements in the type. The DAC package is used to deploy the DAC type to an instance of the Database Engine. Each deployment creates a DAC instance, which contains both the DAC type from the package, and a database created to hold the objects defined in the DAC type.

Thread Safety

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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