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

本文转载自查看原文 2012-09-25 16:22 4657 skylinesoft/ 开发/ skyline

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 >

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