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 GetManifestCompleted As EventHandler(Of GetManifestCompletedEventArgs)

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.

Dim WithEvents iphm As InPlaceHostingManager = Nothing

Public Sub InstallApplication(ByVal deployManifestUriStr As String)
    Try
        Dim deploymentUri As New Uri(deployManifestUriStr)
        iphm = New InPlaceHostingManager(deploymentUri, False)
        MessageBox.Show("Created the object.")
    Catch uriEx As UriFormatException
        MessageBox.Show("Cannot install the application: " & _
                        "The deployment manifest URL supplied is not a valid URL." & _
                        "Error: " & uriEx.Message)
        Return
    Catch platformEx As PlatformNotSupportedException
        MessageBox.Show("Cannot install the application: " & _
                        "This program requires Windows XP or higher. " & _
                        "Error: " & platformEx.Message)
        Return
    Catch argumentEx As ArgumentException
        MessageBox.Show("Cannot install the application: " & _
                        "The deployment manifest URL supplied is not a valid URL." & _
                        "Error: " & argumentEx.Message)
        Return
    End Try

    iphm.GetManifestAsync()
End Sub
    Private Sub iphm_GetManifestCompleted(ByVal sender As Object, ByVal e As GetManifestCompletedEventArgs) Handles iphm.GetManifestCompleted
        ' Check for an error.
        If (e.Error IsNot Nothing) Then
            ' Cancel download and install.
            MessageBox.Show("Could not download manifest. Error: " & e.Error.Message)
            Return
        End If

        ' Dim isFullTrust As Boolean = CheckForFullTrust(e.ApplicationManifest)

        ' Verify this application can be installed.
        Try
            ' the true parameter allows InPlaceHostingManager
            ' to grant the permissions requested in the application manifest. 
            iphm.AssertApplicationRequirements(True)
        Catch ex As Exception
            MessageBox.Show("An error occurred while verifying the application. " & _
                            "Error text: " & ex.Message)
            Return
        End Try

        ' Use the information from GetManifestCompleted() to confirm 
        ' that the user wants to proceed.
        Dim appInfo As String = "Application Name: " & e.ProductName
        appInfo &= ControlChars.Lf & "Version: " & e.Version.ToString()
        appInfo &= ControlChars.Lf & "Support/Help Requests: "

        If Not (e.SupportUri Is Nothing) Then
            appInfo &= e.SupportUri.ToString()
        Else
            appInfo &= "N/A"
        End If

        appInfo &= ControlChars.Lf & ControlChars.Lf & _
            "Confirmed that this application can run with its requested permissions."

        ' If isFullTrust Then
        '    appInfo &= ControlChars.Lf & ControlChars.Lf & _
        '        "This application requires full trust in order to run."
        ' End If

        appInfo &= ControlChars.Lf & ControlChars.Lf & "Proceed with installation?"

        Dim dr As DialogResult = MessageBox.Show(appInfo, _
            "Confirm Application Install", MessageBoxButtons.OKCancel, MessageBoxIcon.Question)
        If dr <> System.Windows.Forms.DialogResult.OK Then
            Return
        End If

        ' Download the deployment manifest. 
        ' Usually, this shouldn't throw an exception unless 
        ' AssertApplicationRequirements() failed, or you did not call that method
        ' before calling this one.
        Try
            iphm.DownloadApplicationAsync()
        Catch downloadEx As Exception
            MessageBox.Show("Cannot initiate download of application. Error: " & downloadEx.Message)
            Return
        End Try
    End Sub

#If 0 Then
    Private Function CheckForFullTrust(ByVal appManifest As XmlReader) As Boolean
        Dim isFullTrust As Boolean = False

        If (appManifest Is Nothing) Then
            Throw New ArgumentNullException("appManifest cannot be null.")
        End If

        Dim xaUnrestricted As XAttribute
        xaUnrestricted = XDocument.Load(appManifest) _
            .Element("{urn:schemas-microsoft-com:asm.v1}assembly") _
            .Element("{urn:schemas-microsoft-com:asm.v2}trustInfo") _
            .Element("{urn:schemas-microsoft-com:asm.v2}security") _
            .Element("{urn:schemas-microsoft-com:asm.v2}applicationRequestMinimum") _
            .Element("{urn:schemas-microsoft-com:asm.v2}PermissionSet") _
            .Attribute("Unrestricted")  ' Attributes never have a namespace


        If xaUnrestricted Then
            If xaUnrestricted.Value = "true" Then
                Return True
            End If
        End If

        Return False
    End Function
#End If

.NET Framework
Available since 2.0
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