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UpdateCheckInfo Class

Represents detailed update information obtained through a call to CheckForDetailedUpdate.

Namespace: System.Deployment.Application
Assembly: System.Deployment (in system.deployment.dll)

public class UpdateCheckInfo
public class UpdateCheckInfo
public class UpdateCheckInfo
Not applicable.

With UpdateCheckInfo, 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.

NoteNote:

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.

The following code example uses UpdateAvailable to determine if there is a new application update, and IsUpdateRequired to determine whether to ask the user to install the update.

private void InstallUpdateSyncWithInfo()
{
    UpdateCheckInfo info = null;

    if (ApplicationDeployment.IsNetworkDeployed)
    {
        ApplicationDeployment ad = ApplicationDeployment.CurrentDeployment;

        try
        {
            info = ad.CheckForDetailedUpdate();

        }
        catch (DeploymentDownloadException dde)
        {
            MessageBox.Show("The new version of the application cannot be downloaded at this time. \n\nPlease check your network connection, or try again later. Error: " + dde.Message);
            return;
        }
        catch (InvalidDeploymentException ide)
        {
            MessageBox.Show("Cannot check for a new version of the application. The ClickOnce deployment is corrupt. Please redeploy the application and try again. Error: " + ide.Message);
            return;
        }
        catch (InvalidOperationException ioe)
        {
            MessageBox.Show("This application cannot be updated. It is likely not a ClickOnce application. Error: " + ioe.Message);
            return;
        }

        if (info.UpdateAvailable)
        {
            Boolean doUpdate = true;

            if (!info.IsUpdateRequired)
            {
                DialogResult dr = MessageBox.Show("An update is available. Would you like to update the application now?", "Update Available", MessageBoxButtons.OKCancel);
                if (!(DialogResult.OK == dr))
                {
                    doUpdate = false;
                }
            }
            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);
            }

            if (doUpdate)
            {
                try
                {
                    ad.Update();
                    MessageBox.Show("The application has been upgraded, and will now restart.");
                    Application.Restart();
                }
                catch (DeploymentDownloadException dde)
                {
                    MessageBox.Show("Cannot install the latest version of the application. \n\nPlease check your network connection, or try again later. Error: " + dde);
                    return;
                }
            }
        }
    }
}

System.Object
  System.Deployment.Application.UpdateCheckInfo

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

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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