private void distanceQuery_Click(object sender, RoutedEventArgs e)
{
QueryByDistanceParameters param = new QueryByDistanceParameters
{
Geometry = new GeoPoint(10, 10),
Distance = 100,
FilterParameters = new List<FilterParameter>()
{
new FilterParameter(){
Name = "World@World",
},
},
QueryOption = QueryOption.GEOMETRY
};
QueryByDistanceService dqs = new QueryByDistanceService(url);
dqs.ProcessAsync(param);
dqs.ProcessCompleted += new EventHandler<QueryEventArgs>(service_ProcessCompleted);
dqs.Failed += service_Failed;
}
//几何对象绘制结束触发事件
private void drawCompleted(object sender, DrawEventArgs e)
{
double tolerance;
//隐藏 FeatureDataGrid 控件
MyDataGrid.Visibility = Visibility.Collapsed;
//如果距离值为空时，默认为1地图单位
if (!double.TryParse(MyTextBox.Text, out tolerance))
{
tolerance = 1;
}
//如果查找最近地物，只返回一个期望地物
if ((bool)FindNearest.IsChecked)
{
count = 1;
}
else
{
count = 100000;
}
//设置距离查询参数，FilterParameters和Geometry为必设属性
QueryByDistanceParameters param = new QueryByDistanceParameters
{
Geometry = e.Geometry,
ExpectCount = count,
Distance = tolerance,
IsNearest = (bool)FindNearest.IsChecked,
FilterParameters = new List<FilterParameter>()
{
new FilterParameter(){Name = "Countries@World",},
},
//设置是返回查询结果资源（false）还是返回查询结果记录集（true）
ReturnContent = notHighlight
};
//与服务器交互
QueryByDistanceService service = new QueryByDistanceService(url);
service.ProcessAsync(param);
service.ProcessCompleted += new EventHandler<QueryEventArgs>(service_ProcessCompleted);
service.Failed += service_Failed;
//当在 FeaturesLayer 上通过鼠标左键点击触发的事件
flayer.MouseLeftButtonDown +=flayer_MouseLeftButtonDown;
}