C# Windows 10 UWP土工围栏土工围栏必须是圆形吗？

我有一个Windows10UWP应用程序，我正在尝试集成地理围栏。我读过文件说土工栅栏一定是一个圆。这仍然是真的吗？为什么不支持矩形？这看起来很傻，因为我心目中的大多数地理围栏都是长方形的。例如，我的房子，我的院子，建筑物，公园等等。。。它们通常是矩形，而不是圆形

以下是我尝试的代码：

    private Geofence GenerateGeofence()
    {
        string fenceKey = new string(Id.Text.ToCharArray());

        BasicGeoposition positionNW;
        positionNW.Latitude = double.Parse(LatitudeNW.Text);
        positionNW.Longitude = double.Parse(LongitudeNW.Text);
        positionNW.Altitude = 0.0;

        BasicGeoposition positionSE;
        positionSE.Latitude = double.Parse(LatitudeSE.Text);
        positionSE.Longitude = double.Parse(LongitudeSE.Text);
        positionSE.Altitude = 0.0;

        // the geofence can be a circular region. However, we are going to use a rectangle
        GeoboundingBox geoRect = new GeoboundingBox(positionNW, positionSE);

        //Lock into false for single use because we don't want that feature for now.
        bool singleUse = false;

        // want to listen for enter geofence, exit geofence and remove geofence events
        // you can select a subset of these event states
        MonitoredGeofenceStates mask = MonitoredGeofenceStates.Entered | MonitoredGeofenceStates.Exited | MonitoredGeofenceStates.Removed;

        TimeSpan dwellTime;
        TimeSpan duration;
        DateTimeOffset startTime;
        var maxTimeSpan = TimeSpan.MaxValue;

        try
        {
            //We are going to just hard set the dwell time to 5 seconds for now.
            dwellTime = new TimeSpan(ParseTimeSpan("0", defaultDwellTimeSeconds));
            // setting up how long you need to be in geofence for enter event to fire
            //if (string.Empty != DwellTime.Text)
            //{
            //    dwellTime = new TimeSpan(ParseTimeSpan(DwellTime.Text, defaultDwellTimeSeconds));
            //}
            //else
            //{
            //    dwellTime = new TimeSpan(ParseTimeSpan("0", defaultDwellTimeSeconds));
            //}

            // setting up how long the geofence should be active
            if (string.Empty != Duration.Text)
            {
                duration = new TimeSpan(ParseTimeSpan(Duration.Text, 0));
            }
            else
            {
                duration = maxTimeSpan;
            }

            // setting up the start time of the geofence
            if (string.Empty != StartTime.Text)
            {
                startTime = DateTimeOffset.Parse(StartTime.Text);
            }
            else
            {
                // if you don't set start time in C# the start time defaults to 1/1/1601
                calendar.SetToNow();
                startTime = calendar.GetDateTime();
            }
        }
        catch (ArgumentNullException)
        {
        }
        catch (FormatException)
        {
            _rootPage.NotifyUser("Entered value is not a valid string representation of a date and time", NotifyType.ErrorMessage);
        }
        catch (ArgumentException)
        {
            _rootPage.NotifyUser("The offset is greater than 14 hours or less than -14 hours.", NotifyType.ErrorMessage);
        }

        return new Geofence(fenceKey, geoRect, mask, singleUse, dwellTime, startTime, duration);
    }

这是从Windows通用示例中获取的大部分内容，然后我对其进行了修改。如您所见，API确实有一个GeoboundingBox，它需要一个东北角和一个东南角。似乎有人想到了一个长方形。因此，正如您在代码中看到的，我构建了NW-lat/long和SE-lat/long，并且我能够成功地创建GeoboundingBox对象

但是，在我返回带有此行的新地理围栏后，我得到一个例外：

return new Geofence(fenceKey, geoRect, mask, singleUse, dwellTime, startTime, duration);

Geofence对象构造函数只是说它需要传入一个形状，但它显然不喜欢边界框。如果我将代码改回一个圆圈，如下所示：

    private Geofence GenerateGeofence()
    {
        string fenceKey = new string(Id.Text.ToCharArray());

        BasicGeoposition positionNW;
        positionNW.Latitude = double.Parse(LatitudeNW.Text);
        positionNW.Longitude = double.Parse(LongitudeNW.Text);
        positionNW.Altitude = 0.0;

        BasicGeoposition positionSE;
        positionSE.Latitude = double.Parse(LatitudeSE.Text);
        positionSE.Longitude = double.Parse(LongitudeSE.Text);
        positionSE.Altitude = 0.0;

        // the geofence can be a circular region. However, we are going to use a rectangle
        Geocircle geoCircle = new Geocircle(positionNW, 5.0);

        //Lock into false for single use because we don't want that feature for now.
        bool singleUse = false;

        // want to listen for enter geofence, exit geofence and remove geofence events
        // you can select a subset of these event states
        MonitoredGeofenceStates mask = MonitoredGeofenceStates.Entered | MonitoredGeofenceStates.Exited | MonitoredGeofenceStates.Removed;

        TimeSpan dwellTime;
        TimeSpan duration;
        DateTimeOffset startTime;
        var maxTimeSpan = TimeSpan.MaxValue;

        try
        {
            //We are going to just hard set the dwell time to 5 seconds for now.
            dwellTime = new TimeSpan(ParseTimeSpan("0", defaultDwellTimeSeconds));
            // setting up how long you need to be in geofence for enter event to fire
            //if (string.Empty != DwellTime.Text)
            //{
            //    dwellTime = new TimeSpan(ParseTimeSpan(DwellTime.Text, defaultDwellTimeSeconds));
            //}
            //else
            //{
            //    dwellTime = new TimeSpan(ParseTimeSpan("0", defaultDwellTimeSeconds));
            //}

            // setting up how long the geofence should be active
            if (string.Empty != Duration.Text)
            {
                duration = new TimeSpan(ParseTimeSpan(Duration.Text, 0));
            }
            else
            {
                duration = maxTimeSpan;
            }

            // setting up the start time of the geofence
            if (string.Empty != StartTime.Text)
            {
                startTime = DateTimeOffset.Parse(StartTime.Text);
            }
            else
            {
                // if you don't set start time in C# the start time defaults to 1/1/1601
                calendar.SetToNow();
                startTime = calendar.GetDateTime();
            }
        }
        catch (ArgumentNullException)
        {
        }
        catch (FormatException)
        {
            _rootPage.NotifyUser("Entered value is not a valid string representation of a date and time", NotifyType.ErrorMessage);
        }
        catch (ArgumentException)
        {
            _rootPage.NotifyUser("The offset is greater than 14 hours or less than -14 hours.", NotifyType.ErrorMessage);
        }

        return new Geofence(fenceKey, geoCircle, mask, singleUse, dwellTime, startTime, duration);
    }

它很好用

那么，有人知道一种方法可以让它与矩形一起工作吗

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谢谢

不幸的是，目前唯一受支持的形状是geofence

请检查课程属性的备注

此属性的类型IGeoshape是一个接口，可以支持GeoFence的多种形状。当前唯一受支持的形状是Geocircle，因此在初始化geofences时应该使用这个类

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所以虽然有很多，但土工围栏一定是一个圆圈。

真可惜。非常感谢。我得想点别的办法。