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InPlaceHostingManager.GetManifestCompleted Event

Occurs when the deployment manifest has been downloaded to the local computer.

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

public event EventHandler<GetManifestCompletedEventArgs> GetManifestCompleted

Use the Error property of GetManifestCompletedEventArgs to check whether GetManifestAsync completed successfully or returned an error. If Error is null, GetManifestAsync completed successfully, and you can call AssertApplicationRequirements.

The following code examples demonstrate how to call the GetManifestAsync method. The handler for the GetManifestCompleted event callback checks to see if the manifest download completed successfully, and if so, prompts the user with additional information about the application. If the user agrees to continue the installation, the handler calls DownloadApplicationAsync.

The following code examples assume that you have already defined and created an instance of InPlaceHostingManager named iphm.

InPlaceHostingManager iphm = null;

private void InstallApplication(string deployManifestUriStr)
{
    try
    {
        Uri deploymentUri = new Uri(deployManifestUriStr);
        iphm = new InPlaceHostingManager(deploymentUri, false);
        MessageBox.Show("Created the object.");
    }
    catch (UriFormatException uriEx)
    {
        MessageBox.Show("Cannot install the application: The deployment manifest URL supplied is not a valid URL." +
            "Error: " + uriEx.Message);
        return;
    }
    catch (PlatformNotSupportedException platformEx)
    {
        MessageBox.Show("Cannot install the application: This program requires Windows XP or higher. " +
            "Error: " + platformEx.Message);
        return;
    }
    catch (ArgumentException argumentEx)
    {
        MessageBox.Show("Cannot install the application: The deployment manifest URL supplied is not a valid URL." +
            "Error: " + argumentEx.Message);
        return;
    }

    iphm.GetManifestCompleted += new EventHandler<GetManifestCompletedEventArgs>(iphm_GetManifestCompleted);
    iphm.GetManifestAsync();
}
void iphm_GetManifestCompleted(object sender, GetManifestCompletedEventArgs e)
{
    // Check for an error. 
    if (e.Error != null)
    {
        // Cancel download and install.
        MessageBox.Show("Could not download manifest. Error: " + e.Error.Message);
        return;
    }

    // Dig inside of the manifest and see if this application requests full trust. 
    // You can determine this by searching for a PermissionSet tag 
    // that has the Unrestricted attribute set to true. 
    bool isFullTrust = CheckForFullTrust(e.ApplicationManifest);

    // Verify this application can be installed. 
    try
    {
        iphm.AssertApplicationRequirements();
    }
    catch (InvalidDeploymentException assertEx)
    {
        // Security exception. Report the error to the user.
        MessageBox.Show("Cannot install the application due to a security error. " +
            "Error text: " + assertEx.Message);
        return;
    }
    catch (Exception ex)
    {
        MessageBox.Show("An error occurred while verifying the application. " +
            "Error text: " + ex.Message);
        return;
    }

    // Use the information from GetManifestCompleted() to confirm  
    // that the user wants to proceed.
    string appInfo = "Application Name: " + e.ProductName;
    appInfo += "\nVersion: " + e.Version;
    appInfo += "\nSupport/Help Requests: " + (e.SupportUri != null ?
        e.SupportUri.ToString() : "N/A");
    appInfo += "\n\nConfirmed that this application can run with its requested permissions.";
    if (isFullTrust)
    {
        appInfo += "\n\nThis application requires full trust in order to run.";
    }
    appInfo += "\n\nProceed with installation?";

    DialogResult dr = MessageBox.Show(appInfo, "Confirm Application Install",
        MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
    if (dr != System.Windows.Forms.DialogResult.OK)
    {
        return;
    }

    // Download the deployment manifest.  
    // We've added error handling here simply to be robust. Usually, 
    // this shouldn't throw an exception unless  
    // AssertApplicationRequirements() failed, or you did not call that method 
    // before calling this one.
    iphm.DownloadProgressChanged += new EventHandler<DownloadProgressChangedEventArgs>(iphm_DownloadProgressChanged);
    iphm.DownloadApplicationCompleted += new EventHandler<DownloadApplicationCompletedEventArgs>(iphm_DownloadApplicationCompleted);

    try
    {
        iphm.DownloadApplicationAsync();
    }
    catch (Exception downloadEx)
    {
        MessageBox.Show("Cannot initiate download of application. Error: " +
            downloadEx.Message);
        return;
    }
}

private bool CheckForFullTrust(XmlReader appManifest)
{
    bool isFullTrust = false;

    if (appManifest == null)
    {
        throw (new ArgumentNullException("appManifest cannot be null."));
    }

    while (appManifest.Read())
    {
        // Find the minimum required permission set. 
        if (appManifest.NodeType == XmlNodeType.Element)
        {
            if (appManifest.Name.Equals("applicationRequestMinimum"))
            {
                // Get the next two nodes, which are PermissionSet and 
                // defaultAssemblyRequest. 
                // TODO: Will there ALWAYS be just one PermissionSet here? If so, 
                // I can stick with the simple logic of just examining the  
                // PermissionSet node. Otherwise, I'll need to get  
                // defaultAssemblyRequest, and check the appropriate  
                // PermissionSet.    
                while (appManifest.Read())
                {
                    if (appManifest.Name.Equals("PermissionSet"))
                    {
                        // This is a required attribute - no need to sanity-check 
                        // its existence. 
                        if (appManifest.GetAttribute("Unrestricted").Equals("true"))
                        {
                            isFullTrust = true;
                        }

                        break;
                    }
                }

                break;
            }
        }
    }

    return isFullTrust;
}

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

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