• Artigo

Application.InstallState Property

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Gets the current out-of-browser installation state of the application.

Namespace:  System.Windows
Assembly:  System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public ReadOnly Property InstallState As InstallState

public InstallState InstallState { get; }

Property Value

Type: System.Windows.InstallState
The out-of-browser installation state of the application.

Remarks

Use this property to determine whether a user has installed the application for use outside the browser. To determine whether the current application instance is running outside the browser, use the IsRunningOutOfBrowser property.

Examples

The following code example demonstrates how to use this property. This example is part of a larger example available in How to: Implement Offline Support for Out-of-Browser Applications.

Private Sub App_InstallStateChanged(ByVal sender As Object, _
    ByVal e As EventArgs) Handles app.InstallStateChanged

    UpdateUI()

End Sub

Private Sub UpdateUI()

    UpdateNetworkIndicator()

    installButton.Visibility = If(
        app.InstallState = InstallState.NotInstalled,
        Visibility.Visible, Visibility.Collapsed)

    updateButton.Visibility = If(app.IsRunningOutOfBrowser,
        Visibility.Visible, Visibility.Collapsed)

    isRunningOutOfBrowserTextBlock.Text = _
        app.IsRunningOutOfBrowser.ToString()

    installStateTextBlock.Text = app.InstallState.ToString()

End Sub

Private Sub UpdateNetworkIndicator()

    If app.IsRunningOutOfBrowser Then
        networkIndicator.Visibility = Visibility.Visible
    Else
        networkIndicator.Visibility = Visibility.Collapsed
    End If



    Dim online As Boolean = NetworkInterface.GetIsNetworkAvailable()


    If online Then
        networkIndicator.Text = "ONLINE" 

        updateButton.Visibility = Visibility.Visible
    Else
        networkIndicator.Text = "OFFLINE"
        updateButton.Visibility = Visibility.Collapsed
    End If

End Sub

private void UpdateUI()
{
    UpdateNetworkIndicator();

    installButton.Visibility =
        app.InstallState == InstallState.NotInstalled ?
        Visibility.Visible : Visibility.Collapsed;

    updateButton.Visibility =
        app.IsRunningOutOfBrowser ? 
        Visibility.Visible : Visibility.Collapsed;

    isRunningOutOfBrowserTextBlock.Text = 
        app.IsRunningOutOfBrowser.ToString();

    installStateTextBlock.Text = app.InstallState.ToString();
}

private void UpdateNetworkIndicator()
{
    networkIndicator.Visibility =
        app.IsRunningOutOfBrowser ?
        Visibility.Visible : Visibility.Collapsed;

    bool online = NetworkInterface.GetIsNetworkAvailable();

    networkIndicator.Text = online ?
        "ONLINE" : "OFFLINE";

    updateButton.Visibility = online ?
        Visibility.Visible : Visibility.Collapsed;
}

Version Information

Silverlight

Supported in: 5, 4, 3

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.