CivicAddressResolver.ResolveAddressAsync(GeoCoordinate) 方法

定義

命名空間:

System.Device.Location

組件:

System.Device.dll

以非同步的方式解析根據緯度和經度之位置的地址。 在解析地址的時候，該呼叫不會封鎖呼叫執行緒的執行。

public:
 virtual void ResolveAddressAsync(System::Device::Location::GeoCoordinate ^ coordinate);

public void ResolveAddressAsync (System.Device.Location.GeoCoordinate coordinate);

abstract member ResolveAddressAsync : System.Device.Location.GeoCoordinate -> unit
override this.ResolveAddressAsync : System.Device.Location.GeoCoordinate -> unit

Public Sub ResolveAddressAsync (coordinate As GeoCoordinate)

參數

coordinate

GeoCoordinate

GeoCoordinate 包含解析到市鎮地址的位置。

實作

ResolveAddressAsync(GeoCoordinate)

例外狀況

ArgumentNullException

coordinate 為 null。

ArgumentException

coordinate 未包含有效的緯度和經度。

範例

下列程式示範如何呼叫 ResolveAddressAsync 以異步方式解析公民位址。

using System;
using System.Device.Location;
namespace ResolveAddressSync
{
    class AsyncProgram
    {
        public static void Main(string[] args)
        {
            ResolveAddressAsync();
        }
        static void ResolveAddressAsync()
        {
            GeoCoordinateWatcher watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.High);
            bool started = false;
            watcher.MovementThreshold = 1.0; // set to one meter
            started = watcher.TryStart(false, TimeSpan.FromMilliseconds(1000));

            if (started)
            {
                CivicAddressResolver resolver = new CivicAddressResolver();

                resolver.ResolveAddressCompleted += new EventHandler<ResolveAddressCompletedEventArgs>(resolver_ResolveAddressCompleted);

                if (watcher.Position.Location.IsUnknown == false)
                {
                    resolver.ResolveAddressAsync(watcher.Position.Location);
                }
            }
        }

        static void resolver_ResolveAddressCompleted(object sender, ResolveAddressCompletedEventArgs e)
        {
            if (!e.Address.IsUnknown)
            {
                Console.WriteLine("Country: {0}, Zip: {1}",
                           e.Address.CountryRegion,
                           e.Address.PostalCode);
            }
            else
            {
                Console.WriteLine("Unknown address.");
            }
        }

    }
}

Imports System.Device.Location

Module ResolveCivicAddressAsync

    Public Sub ResolveCivicAddressAsync()
        Dim watcher As GeoCoordinateWatcher
        watcher = New System.Device.Location.GeoCoordinateWatcher(GeoPositionAccuracy.High)
        Dim started As Boolean = False
        watcher.MovementThreshold = 1.0     'set to one meter
        started = watcher.TryStart(False, TimeSpan.FromMilliseconds(1000))
        If started Then
            Dim resolver As CivicAddressResolver = New CivicAddressResolver()
            AddHandler resolver.ResolveAddressCompleted, AddressOf resolver_ResolveAddressCompleted
            If Not watcher.Position.Location.IsUnknown Then
                resolver.ResolveAddressAsync(watcher.Position.Location)
            End If
        End If

        watcher.Start()

    End Sub

    Sub resolver_ResolveAddressCompleted(ByVal sender As Object, ByVal e As ResolveAddressCompletedEventArgs)
        If Not e.Address.IsUnknown Then
            Console.WriteLine("Country: {0}, Zip: {1}",
                           e.Address.CountryRegion,
                           e.Address.PostalCode)
        Else
            Console.WriteLine("Unknown address.")
        End If
    End Sub


    Public Sub Main()

        ResolveCivicAddressAsync()
        Console.WriteLine("Enter any key to quit.")
        Console.ReadLine()
    End Sub

End Module

備註

這個方法會儲存在工作中，它會傳回方法同步對應專案可以擲回的所有非使用例外狀況。 如果例外狀況儲存在傳回的工作中，則會在等候工作時擲回該例外狀況。 使用例外狀況，例如 ArgumentException仍會同步擲回。 如需預存例外狀況，請參閱 擲回的 ResolveAddress(GeoCoordinate)例外狀況。