public delegate void OnPositionChangedEventHandle(object sender, PositionChangedEventArgs e);
public delegate void OnAddressResolveredEventHandle(object sender, AddressResolverEventArgs e);
事件参数类型
public class AddressResolverEventArgs : PositionChangedEventArgs
{
/// <summary>
/// 地址1
/// </summary>
public string Address1 { get; set; }
/// <summary>
/// 地址2
/// </summary>
public string Address2 { get; set; }
/// <summary>
/// 地址3
/// </summary>
public string Address3 { get; set; }
public AddressResolverEventArgs()
{
}
}
public class PositionChangedEventArgs : EventArgs
{
/// <summary>
/// 经度
/// </summary>
public double Longitude { get; set; }
/// <summary>
/// 纬度
/// </summary>
public double Latitude { get; set; }
public object Tag { get; set; }
public PositionChangedEventArgs()
{
}
}
添加命名空间
using System.Device.Location;
public class DevicePositioning
{
private CivicAddressResolver _address = null;
private GeoCoordinateWatcher _location = null;
private GeoCoordinate _lastPosition = GeoCoordinate.Unknown;
private volatile bool _locationOn = true;
private bool _resolverByPositionChanged = true;
public event OnAddressResolveredEventHandle OnAddressResolvered;
/// <summary>
/// 当前位置
/// </summary>
public GeoCoordinate Position
{
get { return _lastPosition; }
}
public DevicePositioning()
{
_location = new GeoCoordinateWatcher(GeoPositionAccuracy.High);
//
_location.MovementThreshold = 1.0;//1米
_location.PositionChanged += Location_PositionChanged;
//
_address = new CivicAddressResolver();
_address.ResolveAddressCompleted += Address_ResolveAddressCompleted;
}
/// <summary>
/// 异步定位取Position值
/// </summary>
public void Positioning()
{
bool started = false;
_resolverByPositionChanged = _locationOn = true;
try
{
started = _location.TryStart(true, TimeSpan.FromMilliseconds(1024));
//_location.TryStart(
//_location.Start(true);
//
if (started)
{
//if (_location.Position.Location.IsUnknown == false)
//{
// _address.ResolveAddressAsync(_location.Position.Location);
//}
}
}
catch (Exception ex)
{
Logs.CallerLog("Error->Positioning:" + ex.Message);
}
finally
{
if (!started && _locationOn)
{
System.Threading.Thread.Sleep(128);
Positioning();
}
}
}
public void UnPositioning()
{
try
{
_locationOn = false;
if (_location != null)
_location.Stop();
}
catch (Exception ex)
{
Logs.CallerLog("Error->UnPositioning:" + ex.Message);
}
}
public void AddressResolver(double lat, double lon)
{
InnerAddressResolver(new GeoCoordinate(lat, lon));
}
private void InnerAddressResolver(GeoCoordinate position)
{
try
{
_lastPosition = position;
_address.ResolveAddressAsync(_lastPosition);
}
catch (Exception ex)
{
Logs.CallerLog("Error->AddressResolver:" + ex.Message);
}
}
private void Location_PositionChanged(object sender, GeoPositionChangedEventArgs<GeoCoordinate> e)
{
try
{
_lastPosition = e.Position.Location;
if (!_lastPosition.IsUnknown && _resolverByPositionChanged)
{
_address.ResolveAddressAsync(_lastPosition);
}
}
catch (Exception ex)
{
Logs.CallerLog("Error->Location_PositionChanged:" + ex.Message);
}
finally
{
_resolverByPositionChanged = false;
}
}
private void Address_ResolveAddressCompleted(object sender, ResolveAddressCompletedEventArgs e)
{
try
{
string address = string.Empty;
if (e.Address.IsUnknown)
{
address = "Unknown [" + _lastPosition.Longitude + "," + _lastPosition.Latitude + "] Address.";
}
else
{
//address = e.Address.AddressLine1;
//address = e.Address.AddressLine2;
address =
e.Address.CountryRegion +
e.Address.StateProvince +
e.Address.City +
e.Address.Building +
e.Address.FloorLevel;
}
if (OnAddressResolvered != null)
{
OnAddressResolvered.BeginInvoke(this, new AddressResolverEventArgs()
{
Longitude = _lastPosition.Longitude,
Latitude = _lastPosition.Latitude,
Address1 = e.Address.AddressLine1,
Address2 = e.Address.AddressLine2,
Address3 = address
}, End_CallBack, null);
}
}
catch (Exception ex)
{
Logs.CallerLog("Error->Address_ResolveAddressCompleted:" + ex.Message);
}
finally
{
}
}
private void End_CallBack(IAsyncResult ar)
{
try
{
if (ar.IsCompleted)
{
if (OnAddressResolvered != null)
OnAddressResolvered.EndInvoke(ar);
}
}
catch (Exception ex)
{
Logs.CallerLog("Error->End_CallBack:" + ex.Message);
}
}
}
Demo 用到的程序集 System.Device.dll v4.0 本地电脑上会有的。