QDatabase Constructor (filePath, outputPath)

Microsoft Deployment Tools

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Deployment Tools Foundation QDatabase Constructor (filePath, outputPath)

Opens an existing database with another database as output.

Declaration Syntax

Visual Basic

Visual C++

public QDatabase(
	string filePath,
	string outputPath
)

Public Sub New ( _
	filePath As String, _
	outputPath As String _
)

public:
QDatabase(
	String^ filePath, 
	String^ outputPath
)

Parameters

filePath (String): Path to the database to be read.

outputPath (String): Open mode for the database

Return Value

Database object representing the created or opened database

Remarks

When a database is opened as the output of another database, the summary information stream of the output database is actually a read-only mirror of the original database and thus cannot be changed. Additionally, it is not persisted with the database. To create or modify the summary information for the output database it must be closed and re-opened.

The returned Database object should be Close()()()d after use. The finalizer will close the handle if it is still open, however due to the nondeterministic nature of finalization it is best that the handle be closed manually as soon as it is no longer needed, as leaving lots of unused handles open can degrade performance.

Exceptions

Exception	Condition
InstallerException	the database could not be created/opened

Assembly: Microsoft.Deployment.WindowsInstaller.Linq (Module: Microsoft.Deployment.WindowsInstaller.Linq) Version: 3.0.0.0 (3.5.1623.0)

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