基于Skyline的TerraExplorer6.1.1如何通过二次开发实现矢量图层的空间查询和属性查询

说明：先准备好一个FLY工程文件，其中要加载一个相对标准的SHP文件，自己参考其他部分实现绘制几何对象的方法；

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <script type="text/javascript" language="javascript">
        //遍历整个图层
        //zhaohe.2012.09.25.
        function GetFeatureAll() {
            var strResult = "<table>";
            var SGWorld = CreateSGObj();
            var ItemID = SGWorld.ProjectTree.FindItem("Fairfax_zones");
            var obj = SGWorld.ProjectTree.GetLayer(ItemID);
            // 遍历当前图层中已经在地图上加载的全部对象及其属性
            var pIFeatureGroup = obj.FeatureGroups(0);
            for (var i = 0; i < pIFeatureGroup.Count; i++) {
                strResult = strResult + "<tr>";
                var pIFeature = pIFeatureGroup.Item(i);
                for (var j = 0; j < pIFeature.FeatureAttributes.Count; j++) {
                    var pIFeatureAttribute = pIFeature.FeatureAttributes.Item(j);
                    strResult = strResult + "<td>" + pIFeatureAttribute.Name + "*" + pIFeatureAttribute.Value + "</td>";
                }
                strResult = strResult + "</tr>";
            }
            strResult = strResult + "</table>";
            window.document.getElementById("result").innerHTML = strResult;
        }

        //多边形查询
        //zhaohe.2012.09.25.
        function GetFeatureWithPoly() {
            var strResult = "<table>";
            var SGWorld = CreateSGObj();
            var ItemID = SGWorld.ProjectTree.FindItem("Fairfax_zones");
            var obj = SGWorld.ProjectTree.GetLayer(ItemID);
            // 遍历多边形内选中的对象及其属性
            var qItemID = SGWorld.ProjectTree.GetNextItem(0, 10);
            var qobj = SGWorld.ProjectTree.GetObject(qItemID);
            var queryGeometry = qobj.Geometry;
            var resFeatures = obj.ExecuteSpatialQuery(queryGeometry, 1);
            for (var i = 0; i < resFeatures.Count; i++) {
                strResult = strResult + "<tr>";
                var pIFeature = resFeatures.Item(i);
                for (var j = 0; j < pIFeature.FeatureAttributes.Count; j++) {
                    var pIFeatureAttribute = pIFeature.FeatureAttributes.Item(j);
                    strResult = strResult + "<td>" + pIFeatureAttribute.Name + "*" + pIFeatureAttribute.Value + "</td>";
                }
                strResult = strResult + "</tr>";
            }
            strResult = strResult + "</table>";
            window.document.getElementById("result").innerHTML = strResult;
        }

        //属性查询
        //zhaohe.2012.09.25.
        function GetFeatureWithPro() {
            var SGWorld = CreateSGObj();
            var ItemID = SGWorld.ProjectTree.FindItem("Fairfax_zones");
            var obj = SGWorld.ProjectTree.GetLayer(ItemID);
            var clause = window.document.getElementById("Text1").value;
            if (clause == "") {
                obj.Filter = clause;
                obj.Streaming = 1;
                obj.Refresh();
            }
            else {
                obj.Filter = clause;
                obj.Streaming = 0;
                obj.Refresh();
            }
            GetFeatureAll();
        }

        /*
        功能:   创建sgworld对象
        备注:   赵贺 2011.04.01.
        */
        function CreateSGObj() {
            var obj = $("sgworld");
            if (obj == null) {
                obj = document.createElement('object');
                document.body.appendChild(obj);
                obj.name = "sgworld";
                obj.id = "sgworld";
                obj.classid = "CLSID:3a4f91b0-65a8-11d5-85c1-0001023952c1";
            }
            return obj;
        }
        function $(id) {
            return window.document.getElementById(id);
        }
    </script>
</head>
<body>
    <table>
        <tr>
            <td colspan="4">
                <input id="Button1" type="button" value="全部Feature" onclick="GetFeatureAll()" />
                <input id="Button2" type="button" value="空间查询" onclick="GetFeatureWithPoly()" />
            </td>
        </tr>
        <tr>
            <td colspan="4">
                <input id="Text1" type="text" value="Class=3" />
                <input id="Button6" type="button" value="属性查询" onclick="GetFeatureWithPro()" />
            </td>
        </tr>
        <tr>
            <td>
                <div id="result">
                </div>
            </td>
        </tr>
    </table>
</body>
</html>