UserActivitySessionHistoryItem 类

定义

命名空间:

Windows.ApplicationModel.UserActivities

提供用户参与特定活动的开始和结束时间。

public ref class UserActivitySessionHistoryItem sealed

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 393216)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
class UserActivitySessionHistoryItem final

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 393216)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
public sealed class UserActivitySessionHistoryItem

Public NotInheritable Class UserActivitySessionHistoryItem

继承

Object Platform::Object IInspectable UserActivitySessionHistoryItem

属性

ContractVersionAttribute MarshalingBehaviorAttribute

Windows 要求

设备系列	Windows 10, version 1803 (在 10.0.17134.0 中引入)
API contract	Windows.Foundation.UniversalApiContract (在 v6.0 中引入)

示例

private async void GetMostRecentActivity()
{
    UserActivityChannel channel = UserActivityChannel.GetDefault();

    // Gets the 10 most recently engaged UserActivity objects, sorted by engagement EndTime (null EndTimes sort first)
    IList<UserActivitySessionHistoryItem> recentActivity = await channel. GetRecentUserActivitiesAsync(maxUniqueActivities: 10);

    foreach (var activity in recentActivity)
    {
        var engagements = await channel.GetSessionHistoryItemsForUserActivityAsync(activity.UserActivity.ActivityId, new DateTimeOffset(DateTime.Now, TimeSpan.FromDays(1)));

        long totalEngagementTime = 0;
        foreach(var e in engagements)
        {
            if (e.EndTime != null) // EndTime may be null for active UserActivities
            {
                totalEngagementTime += e.EndTime.Value.Ticks - e.StartTime.Ticks);
            }
            // App specific code to display the activity engagement time
        }
    }
}

注解

许多应用程序提供最近使用的 (MRU) 列表。 此类提供有关 UserActivity 的开始和结束时间信息，以便你可以为用户活动提供类似的体验。

属性

EndTime	获取用户停止参与与此 UserActivitySessionHistoryItem 关联的 UserActivity 的时间。
StartTime	获取用户开始参与与此 UserActivitySessionHistoryItem 关联的 UserActivity 的时间。
UserActivity	获取与此 UserActivitySessionHistoryItem 关联的 UserActivity。