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TransactedInstaller Class

Defines an installer that either succeeds completely or fails and leaves the computer in its initial state.

Namespace:  System.Configuration.Install
Assembly:  System.Configuration.Install (in System.Configuration.Install.dll)

Public Class TransactedInstaller _
	Inherits Installer
Dim instance As TransactedInstaller

To run installers in a transaction, add them to the Installers property of this TransactedInstaller instance.

The following example demonstrates the TransactedInstaller, Install and Uninstall methods of the TransactedInstaller class.

This example provides an implementation similar to that of Installer Tool (Installutil.exe). It installs assemblies with the options preceding that particular assembly. If an option is not specified for an assembly, the previous assembly's options are used if there is a previous assembly in the list. If either the "/u" or "/uninstall" option is specified, the assemblies are uninstalled. If the "/?" or "/help" option is provided, the help information is displayed to the console.

Dim options As New ArrayList()
Dim myOption As String 
Dim toUnInstall As Boolean = False 
Dim toPrintHelp As Boolean = False 
Dim myTransactedInstaller As New TransactedInstaller()
Dim myAssemblyInstaller As AssemblyInstaller
Dim myInstallContext As InstallContext

   Dim i As Integer 
   For i = 1 To args.Length - 1
      ' Process the arguments. 
      If args(i).StartsWith("/") Or args(i).StartsWith("-") Then
         myOption = args(i).Substring(1)
         ' Determine whether the option is to 'uninstall' an assembly. 
         If String.Compare(myOption, "u", True) = 0 Or _
            String.Compare(myOption,"uninstall", True) = 0 Then
            toUnInstall = True
            GoTo ContinueFor1
         End If 
         ' Determine whether the option is for printing help information. 
         If String.Compare(myOption, "?", True) = 0 Or _
            String.Compare(myOption, "help", True) = 0 Then
            toPrintHelp = True
            GoTo ContinueFor1
         End If 
         ' Add the option encountered to the list of all options 
         ' encountered for the current assembly.
         ' Determine whether the assembly file exists. 
         If Not File.Exists(args(i)) Then 
            ' If assembly file doesn't exist then print error.
            Console.WriteLine(ControlChars.Newline + _
                     "Error : {0} - Assembly file doesn't exist.", args(i))
         End If 

         ' Create a instance of 'AssemblyInstaller' that installs the given assembly.
         myAssemblyInstaller = New AssemblyInstaller(args(i), _
                        CType(options.ToArray(GetType(String)), String()))
         ' Add the instance of 'AssemblyInstaller' to the 'TransactedInstaller'.
      End If
   Next i
   ' If user requested help or didn't provide any assemblies to install 
   ' then print help message. 
   If toPrintHelp Or myTransactedInstaller.Installers.Count = 0 Then
   End If 

   ' Create a instance of 'InstallContext' with the options specified.
   myInstallContext = New InstallContext("Install.log", _
               CType(options.ToArray(GetType(String)), String()))
   myTransactedInstaller.Context = myInstallContext

   ' Install or Uninstall an assembly depending on the option provided. 
   If Not toUnInstall Then
      myTransactedInstaller.Install(New Hashtable())
   End If 
Catch e As Exception
   Console.WriteLine(ControlChars.Newline + "Exception raised : {0}", e.Message)
End Try


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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0