Represents detailed update information obtained through a call to CheckForDetailedUpdate.
Assembly: System.Deployment (in System.Deployment.dll)
With , you can decide whether to upgrade your ClickOnce application based on information about the newest version. UpdateAvailable will return a Boolean value indicating whether there is a new update at all. The AvailableVersion property provides the version number of the new version, while MinimumRequiredVersion provides the earliest version that the user should have installed. IsUpdateRequired expresses whether the latest available update is required of the user. Finally, UpdateSizeBytes expresses the total size of the update.
Visual Studio adds the <deploymentProvider> element to the manifest only if the application is set to check for updates, so you either have to check The application should check for updates or specify an update URL in Update location in the Application Updates Dialog Box.
Private Sub InstallUpdateSyncWithInfo() Dim info As UpdateCheckInfo = Nothing If (ApplicationDeployment.IsNetworkDeployed) Then Dim AD As ApplicationDeployment = ApplicationDeployment.CurrentDeployment Try info = AD.CheckForDetailedUpdate() Catch dde As DeploymentDownloadException MessageBox.Show("The new version of the application cannot be downloaded at this time. " + ControlChars.Lf & ControlChars.Lf & "Please check your network connection, or try again later. Error: " + dde.Message) Return Catch ioe As InvalidOperationException MessageBox.Show("This application cannot be updated. It is likely not a ClickOnce application. Error: " & ioe.Message) Return End Try If (info.UpdateAvailable) Then Dim doUpdate As Boolean = True If (Not info.IsUpdateRequired) Then Dim dr As DialogResult = MessageBox.Show("An update is available. Would you like to update the application now?", "Update Available", MessageBoxButtons.OKCancel) If (Not System.Windows.Forms.DialogResult.OK = dr) Then doUpdate = False End If Else ' Display a message that the app MUST reboot. Display the minimum required version. MessageBox.Show("This application has detected a mandatory update from your current " & _ "version to version " & info.MinimumRequiredVersion.ToString() & _ ". The application will now install the update and restart.", _ "Update Available", MessageBoxButtons.OK, _ MessageBoxIcon.Information) End If If (doUpdate) Then Try AD.Update() MessageBox.Show("The application has been upgraded, and will now restart.") Application.Restart() Catch dde As DeploymentDownloadException MessageBox.Show("Cannot install the latest version of the application. " & ControlChars.Lf & ControlChars.Lf & "Please check your network connection, or try again later.") Return End Try End If End If End If End Sub
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.