Question

我正在开发wp8应用程序。我想创建AutoCompleteBox进行快速搜索。这是我的xaml：

 <Grid x:Name="LayoutRoot" Background="Transparent">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="*"/>
    </Grid.RowDefinitions>

    <Grid x:Name="ContentPanel" Grid.Row="0" Grid.RowSpan="2">
        <maps:Map x:Name="MapWithMyLocation" Tap="mapWithMyLocation_Tap">
       </maps:Map>
    </Grid>

    <Grid Grid.Row="0">
        <controls:AutoCompleteBox  x:Name="TxtSearch" TextChanged="TxtSearch_OnTextChanged" />
    </Grid>
</Grid>

这是我在AutoCompleteBox上的事件TxtSearch_OnTextChanged

 private void TxtSearch_OnTextChanged(object sender, RoutedEventArgs e)
    {
        if (TxtSearch.Text.Length > 0)
        {
            Maps_GeoCoding(TxtSearch.Text);
        }
    }

    private async void Maps_GeoCoding(string sender)
    {
        var myGeolocator = new Geolocator();
        var myGeoposition = await myGeolocator.GetGeopositionAsync();
        var myGeocoordinate = myGeoposition.Coordinate;
        MyGeoCoordinate =
            CoordinateConverter.ConvertGeocoordinate(myGeocoordinate);
        if (MyGeoCoordinate == null) return;
        var geoQuery = new GeocodeQuery { SearchTerm = sender, GeoCoordinate = MyGeoCoordinate };
        var locations = await geoQuery.GetMapLocationsAsync();
        var items = new List<String>();
        var str = "";
        foreach (var item in locations)
        {
            str += item.Information.Address.City + " ";
            str += item.Information.Address.Street + " ";
            str += item.Information.Address.HouseNumber + " ";
            items.Add(str);
            str = "";
        }
        TxtSearch.ItemsSource = items;
    }

但AutoCompleteBox显示一些错误的信息或不显示。有什么想法吗？

Answer 1

刚刚改写了我的功能。现在我只使用FirstOrDefault获取一个项目。这是一个例子：

private async void Maps_GeoCoding(string sender)
    {
        var myAddress = new List<String>();
        var myGeolocator = new Geolocator();
        var myGeoposition = await myGeolocator.GetGeopositionAsync();
        var myGeocoordinate = myGeoposition.Coordinate;
        MyGeoCoordinate =
            CoordinateConverter.ConvertGeocoordinate(myGeocoordinate);
        if (MyGeoCoordinate == null) return;
        var geoQuery = new GeocodeQuery { SearchTerm = sender, GeoCoordinate = MyGeoCoordinate };
        var locations = await geoQuery.GetMapLocationsAsync();
        var location = locations.FirstOrDefault();
        if (location != null)
        {
            myAddress.Add(location.Information.Address.City + " " + location.Information.Address.Street + " " + location.Information.Address.HouseNumber);
            MapWithMyLocation.Center = location.GeoCoordinate;
        }
        TxtSearch.ItemsSource = myAddress;
    }

XAML与问题相同。

如何在wp8中按地址获取位置并在AutoCompleteBox中显示？

1 个答案: