PowerGridForecast 类

参考

定义

命名空间:: Windows.Devices.Power

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

编辑

包含有关设备连接到的电网的信息。这些数据旨在用于预测工作负荷发生的时间转移，或在紧张时期减少能耗。

public ref class PowerGridForecast sealed

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Devices.Power.PowerGridApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class PowerGridForecast final

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Devices.Power.PowerGridApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class PowerGridForecast

Public NotInheritable Class PowerGridForecast

继承: Object Platform::Object IInspectable PowerGridForecast

属性: ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Windows 要求

设备系列	Windows Desktop Extension SDK (在 10.0.26100.0 中引入)
API contract	Windows.Devices.Power.PowerGridApiContract (在 v1.0 中引入)

示例

using Windows.Devices.Power;

void PrintBestTimes(PowerGridForecast forecast)
{
    double bestSeverity = double.MaxValue;
    double bestLowImpactSeverity = double.MaxValue;
    DateTime bestTime = DateTime.MaxValue;
    DateTime bestLowImpactTime = DateTime.MaxValue;
    TimeSpan blockDuration = forecast.BlockDuration;
    DateTime startTime = forecast.StartTime;
    IList<PowerGridData> forecastSignals = forecast.Forecast;

    if (forecastSignals.Count == 0)
    {
        Console.WriteLine("Error encountered with getting forecast; try again later.");
        return;
    }

    foreach (PowerGridData data in forecastSignals)
    {
        if (data.Severity < bestSeverity)
        {
            bestSeverity = data.Severity;
            bestTime = startTime;
        }

        if (data.IsLowUserExperienceImpact && data.Severity < bestLowImpactSeverity)
        {
            bestLowImpactSeverity = data.Severity;
            bestLowImpactTime = startTime;
        }

        startTime = startTime + blockDuration;
    }

    if (bestLowImpactTime != DateTime.MaxValue)
    {
        DateTime endBestLowImpactTime = bestLowImpactTime + blockDuration;
        Console.WriteLine($"Lowest severity during low impact is {bestLowImpactSeverity}, which starts at {bestLowImpactTime.ToString()}, and ends at {endBestLowImpactTime}.");
    }
    else
    {
        Console.WriteLine("There's no low-user-impact time in which to do work.");
    }

    if (bestTime != DateTime.MaxValue)
    {
        DateTime endBestSeverity = bestTime + blockDuration;
        Console.WriteLine($"Lowest severity is {bestSeverity}, which starts at {bestTime.ToString()}, and ends at {endBestSeverity.ToString()}.");
    }
}

PowerGridForecast forecast = PowerGridForecast.GetForecast();
PrintBestTimes(forecast);

#include "pch.h"
#include <iostream>
#include <winrt/Windows.Foundation.Collections.h>
#include <winrt/Windows.Devices.Power.h>

using namespace winrt::Windows::Devices::Power;
using namespace winrt::Windows::Foundation::Collections;
using namespace winrt::Windows::Foundation;

void PrintFullForecast(PowerGridForecast const& forecast)
{
    IVectorView<PowerGridData> forecastSignals = forecast.Forecast();
    DateTime forecastStartTime = forecast.StartTime();
    TimeSpan forecastBlockDuration = forecast.BlockDuration();
    DateTime blockStartTime = forecastStartTime;

    // On failure the forecast will be empty.
    if (forecastSignals.Size() == 0)
    {
        std::wcout << L"Error encountered while reading the forecast; try again later." << std::endl;
        return;
    }

    // Iterate through the forecast printing all the data.
    for (auto const& block : forecastSignals)
    {
        auto severity = block.Severity();
        auto isLowImpact = block.IsLowUserExperienceImpact();

        std::wcout << L"Start time - ";
        PrintDateTime(blockStartTime, true);
        std::wcout << L" | End time - ";
        PrintDateTime(blockStartTime + forecastBlockDuration, true);
        std::wcout << L" | Intensity - " << severity << L" | IsLowImpactTime - " << (isLowImpact ? L"TRUE" : L"FALSE") << std::endl;

        blockStartTime = blockStartTime + forecastBlockDuration;
    }
}

void PrintBestTimes(PowerGridForecast const& forecast)
{
    IVectorView<PowerGridData> forecastSignals = forecast.Forecast();
    DateTime forecastStartTime = forecast.StartTime();
    TimeSpan forecastBlockDuration = forecast.BlockDuration();
    DateTime blockStartTime = forecastStartTime;

    // On failure the forecast will be empty
    if (forecastSignals.Size() == 0)
    {
        std::wcout << L"Error encountered while reading the forecast; try again later." << std::endl;
        return;
    }

    DateTime bestSeverityTimeUTC = DateTime::max();
    DateTime bestSeverityTimeInLowUserImpactTimeUTC = DateTime::max();

    // 1.0 is maximum severity the API can return.
    double bestSeverity = 1.0;
    double bestSeverityInLowUserImpactTime = 1.0;

    // Iterate through the forecast looking for the best times.
    for (auto const& block : forecastSignals)
    {
        auto severity = block.Severity();
        auto isLowImpact = block.IsLowUserExperienceImpact();

        // Check if there is lower severity
        if (severity < bestSeverity)
        {
            bestSeverity = severity;
            bestSeverityTimeUTC = blockStartTime;
        }

        // Check whether there's a lower severity that's also at a time with low user impact.
        if (isLowImpact && severity < bestSeverityInLowUserImpactTime)
        {
            bestSeverityInLowUserImpactTime = severity;
            bestSeverityTimeInLowUserImpactTimeUTC = blockStartTime;
        }

        blockStartTime = blockStartTime + forecastBlockDuration;
    }

    // Print out the best times only if they've been set.
    if (bestSeverityTimeUTC != DateTime::max())
    {
        std::wcout << L"Best time to do work is ";
        PrintDateTime(bestSeverityTimeUTC, true);
        std::wcout << L" with a severity of " << bestSeverity;
        std::wcout << L" and ends at ";
        PrintDateTime(bestSeverityTimeUTC + forecastBlockDuration, true);
        std::wcout << std::endl;
    }

    if (bestSeverityTimeInLowUserImpactTimeUTC != DateTime::max())
    {
        std::wcout << L"Best time with low user impact is ";
        PrintDateTime(bestSeverityTimeInLowUserImpactTimeUTC, true);
        std::wcout << L" with a severity of " << bestSeverityInLowUserImpactTime;
        std::wcout << L" and ends at ";
        PrintDateTime(bestSeverityTimeInLowUserImpactTimeUTC + forecastBlockDuration, true);
        std::wcout << std::endl;
    }
    else
    {
        std::wcout << "There's no low-user-impact time in which to do work." << std::endl;
    }
}

int main() 
{
    std::wcout << L"Power Grid Forecast WinRT API sample app." << std::endl;

    // Register for the forecast notification.
    auto revoker = PowerGridForecast::ForecastUpdated(winrt::auto_revoke, [&](auto, winrt::Windows::Foundation::IInspectable const&) {
        std::wcout << L"Forecast updated..." << std::endl;

        // Forecast has been updated; find the next best times.
        PowerGridForecast forecast = PowerGridForecast::GetForecast();
        PrintBestTimes(forecast);
    });

    // Print out the full forecast.
    PowerGridForecast forecast = PowerGridForecast::GetForecast();
    PrintFullForecast(forecast);

    // Wait until the user presses a key to exit.
    std::cout << "Listening to the signal: a new forecast has been created."
                    "Leave this program open to see when a new forecast is created, otherwise press any key to exit this program..." << std::endl;
    std::cin.get();

    return 0;
}

注解

Windows 根据设备连接到的电网公开电网碳排放的预测。例如，此数据已被Windows 更新用于在更新发生时进行计时，以减少碳排放量。此 API 会向你公开这些相同的预测，以便减少某些工作负载的碳排放量。例如，当应用/游戏更新发生时，你可以进行时移;或限制音频播放的比特率，或某些其他渲染保真度级别;或者启用 效率模式（如果有）。

电网预测 API 提供两个信号， (提示时移) 。一个信号包含规范化严重性值 (介于 0.0 到 1.0) 之间的网格条件，以优化 (碳强度) 。另一个信号 IsLowUserExperienceImpact 是一个布尔值，表示 Windows 认为用户离开设备时。可以选择只使用一个信号而不是两个信号;信号具有单独的值以及一起的值。

移时是指使用相同的能量来完成工作，但根据信号在不同的时间完成工作。

严重性 是介于 0.0 和 1.0 之间的规范化值，其中 0 被视为最佳值，1 表示最差。这对应于基于设备所在位置的电网碳严重性。

用户体验影响较低。一个布尔值，表示 Windows 认为用户将离开或不使用许多资源。这可以视为反活动小时数。当值为 true时，它被认为是将工作负载及时转移到的合适时机。 false如果是，则就用户体验而言，它被认为是将工作负载及时转移到的糟糕时机。

属性

BlockDuration	Forecast 向量中每个元素的持续时间。
Forecast	获取包含预测数据的向量。预测是连续的，从 StartTime 开始。可以使用计算 `StartTime + (index * BlockDuration)`每个元素的开始时间。
StartTime	获取 Forecast 中第一个元素的开始时间。

方法

GetForecast()

用于检索预测的静态方法。失败时，这将返回空的预测。

事件

ForecastUpdated

在新的预测有效负载准备就绪时通知订阅者的事件。当应用收到此通知时，应调用 GetForecast。

适用于

PowerGridForecast 类

定义

Windows 要求

示例

注解

属性

方法

事件

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