BackgroundTask.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Windows.ApplicationModel.Background;

namespace Coolapk_UWP
{
    public sealed class BackgroundTask : IBackgroundTask
    {
        public BackgroundTask()
        {

        }

        public void Run(IBackgroundTaskInstance taskInstance)
        {
            Debug.Write("task run");
        }

        public static async Task<BackgroundTaskRegistration> RegisterBackgroundTask(Type taskEntryPoint,
            string taskName,
            IBackgroundTrigger trigger,
            IBackgroundCondition condition)
        {
            var status = await BackgroundExecutionManager.RequestAccessAsync();
            if (status == BackgroundAccessStatus.Unspecified || status == BackgroundAccessStatus.DeniedBySystemPolicy || status == BackgroundAccessStatus.DeniedByUser)
            {
                return null;
            }
            foreach (var cur in BackgroundTaskRegistration.AllTasks)
            {
                if (cur.Value.Name == taskName)
                {
                    cur.Value.Unregister(true);
                }
            }
            var builder = new BackgroundTaskBuilder
            {
                Name = taskName,
                TaskEntryPoint = taskEntryPoint.FullName,
            };
            builder.SetTrigger(trigger);
            if (condition != null)
            {
                builder.AddCondition(condition);
            }

            BackgroundTaskRegistration task = builder.Register();
            return task;
        }
    }
}