GeoCoordinate.Speed 属性

定义

命名空间:

System.Device.Location

程序集:

System.Device.dll

获取或设置以米/秒为单位的速度。

public:
 property double Speed { double get(); void set(double value); };

public double Speed { get; set; }

member this.Speed : double with get, set

Public Property Speed As Double

属性值

Double

以米/秒为单位的速度。 速度必须大于或等于零，或为 NaN。

例外

ArgumentOutOfRangeException

对 Speed 的设定超出了有效范围。

示例

以下示例打印Course当前位置 的 GeoCoordinate和 Speed 属性。

static void GetLocationCourseAndSpeed()
{
    GeoCoordinateWatcher watcher = new GeoCoordinateWatcher();

    watcher.TryStart(true, TimeSpan.FromMilliseconds(1000));

    if (watcher.Position.Location.IsUnknown != true)
    {
        GeoCoordinate coord = watcher.Position.Location;

        Console.WriteLine("Course: {0}, Speed: {1}",
            coord.Course,
            coord.Speed);
    }
    else
    {
        Console.WriteLine("Unknown");
    }
}

Public Sub GetLocationCourseAndSpeed()
    Dim watcher As GeoCoordinateWatcher
    watcher = New System.Device.Location.GeoCoordinateWatcher()
    watcher.TryStart(False, TimeSpan.FromMilliseconds(1000))

    If Not watcher.Position.Location.IsUnknown Then
        Dim coord As GeoCoordinate = watcher.Position.Location
        Console.WriteLine("Course: {0}, Speed: {1}",
            coord.Course,
            coord.Speed) 'NaN if not available.
    Else
        Console.WriteLine("Location unknown.")
    End If

End Sub