如何根据图钉查询相关的几何（多边形）？

Question

我想从具有几何和地理位置的SQL表中查询数据，例如具有属性id，name，lat，long和poly的对象表。

我已经使用ajax实现了查询，该查询使用lat和long信息给出了城市的结果。我想同时使用ajax来获取polygon属性。

以下是我的代码部分：

var map = (function() {
  var bingMap = null;
  var mapElementID = "myMap";
  var key = "API_KEY";

  function addPin(coords) {
    var location = new Microsoft.Maps.Location(coords[1], coords[2]);
    var pushpin = new Microsoft.Maps.Pushpin(location);
    pushpin.setOptions({ text: coords[0] });

    bingMap.entities.push(pushpin);
  }
  function addCityPins() {
    for (var city = 0; city < grid.cpCities.length; city++) {
      addPin(grid.cpCities[city]);
    }
  }

  function createMap() {
    if (bingMap) bingMap.dispose();

    var mapOptions = {
      credentials: key,
      center: new Microsoft.Maps.Location('41.6000', '21.7000'),
      mapTypeId: Microsoft.Maps.MapTypeId.road,
      zoom: 9
    };
    bingMap = new Microsoft.Maps.Map(
      document.getElementById(mapElementID),
      mapOptions
    );
    bingMap.entities.clear();
    addCityPins();
  }
  return {
    createMap: createMap
  };
})();
// ]]>
</script>

protected void ASPGridView1_CustomJSProperties(object sender, Web.ASPGridViewClientJSPropertiesEventArgs e)
{
    String[][] cities = new String[ASPxGridView1.VisibleRowCount][];

    for (int r = 0; r < ASPxGridView1.VisibleRowCount; r++)
    {
        Object[] dr = ASPxGridView1.GetRowValues(r, "City", "Latitude", "Longitude") as Object[];
        cities[r] = dr.Select(o => (string)o).ToArray();
    }
    e.Properties["cpCities"] = cities;
}