ApplicationDeployment.TimeOfLastUpdateCheck Property

Reference

Definition

Namespace:: System.Deployment.Application

Assembly:: System.Deployment.dll

Important

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Gets the date and the time ClickOnce last checked for an application update.

public:
 property DateTime TimeOfLastUpdateCheck { DateTime get(); };

public DateTime TimeOfLastUpdateCheck { get; }

member this.TimeOfLastUpdateCheck : DateTime

Public ReadOnly Property TimeOfLastUpdateCheck As DateTime

Property Value

DateTime

The DateTime of the last update check.

Examples

The following code example checks whether a ClickOnce application has been checked for available updates in the past three days.

public:
    bool CheckForUpdateDue()
    {
        bool isUpdateDue = false;

        if (ApplicationDeployment::IsNetworkDeployed)
        {
            ApplicationDeployment^ dueAppDeployment =
                ApplicationDeployment::CurrentDeployment;
            TimeSpan^ updateInterval =
                DateTime::Now - dueAppDeployment->TimeOfLastUpdateCheck;
            if (updateInterval->Days >= 3)
            {
                isUpdateDue = true;
            }
        }

        return (isUpdateDue);
    }

private Boolean CheckForUpdateDue()
{
    Boolean isUpdateDue = false;

    if (ApplicationDeployment.IsNetworkDeployed)
    {
        ApplicationDeployment ad = ApplicationDeployment.CurrentDeployment;
        TimeSpan updateInterval = DateTime.Now - ad.TimeOfLastUpdateCheck;
        if (updateInterval.Days > 3)
        {
            isUpdateDue = true;
        }
    }

    return (isUpdateDue);
}

Private Function CheckForUpdateDue() As Boolean
    Dim isUpdateDue As Boolean = False

    If (ApplicationDeployment.IsNetworkDeployed) Then
        Dim AD As ApplicationDeployment = ApplicationDeployment.CurrentDeployment
        Dim updateInterval As TimeSpan = DateTime.Now - AD.TimeOfLastUpdateCheck
        If (updateInterval.Days > 3) Then
            isUpdateDue = True
        End If
    End If

    CheckForUpdateDue = isUpdateDue
End Function

Remarks

A ClickOnce application can be configured for subscription updates. In this scenario, ClickOnce polls an application's deployment location automatically at intervals defined in the deployment manifest, and determines whether there is an update available. TimeOfLastUpdateCheck returns the time of the last update check regardless of whether it was initiated by a subscription or by an explicit check using the CheckForUpdate, CheckForUpdateAsync, CheckForDetailedUpdate, Update, or UpdateAsync method.

If no update check has been performed since the application was installed, TimeOfLastUpdateCheck returns the installation time.

Applies to

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