arcgis 矩形查询

default.aspx页面添加矩形查询控件：

<esri:Tool ClientAction="DragRectangle" DefaultImage="Images/MapTool/rectquery1.gif"
                    HoverImage="Images/MapTool/rectquery2.gif" SelectedImage="Images/MapTool/rectquery2.gif"
                    Name="Rectangle" ServerActionAssembly="App_Code" ServerActionClass="IdentifyRectangle"
                    ToolTip="矩形查询" />

在app_code里面添加IdentifyRectangle类，代码如下：

//添加的引用
using ESRI.ArcGIS.ADF.Web.UI.WebControls.Tools;
using ESRI.ArcGIS.ADF.Web.UI.WebControls;
using ESRI.ArcGIS.ADF.Web.Geometry;

/// <summary>
///IdentifyRectangle 实现矩形查询
/// </summary>
public class IdentifyRectangle : IMapServerToolAction
{
    public IdentifyRectangle()
    {
        //
        //TODO: 在此处添加构造函数逻辑
        //
    }

    public void ServerAction(ToolEventArgs args)
    {
        Map map = args.Control as Map;
        RectangleEventArgs rectargs = (RectangleEventArgs)args;
        System.Drawing.Rectangle myrect = rectargs.ScreenExtent;
        Point minPoint = Point.ToMapPoint(myrect.Left, myrect.Bottom, map.Extent, (int)map.Width.Value, (int)map.Height.Value);
        Point maxPoint = Point.ToMapPoint(myrect.Right, myrect.Top, map.Extent, (int)map.Width.Value, (int)map.Height.Value);
        Envelope mapPoly = new Envelope(minPoint, maxPoint);

        IdentifyHelper.IdentifyRectangle(map, mapPoly);
    }

在IdentifyHelper类中添加IdentifyRectangle方法：

/// <summary>
    /// 矩形查询
    /// </summary>
    /// <param name="map"></param>
    /// <param name="mapPoly"></param>
    public static void IdentifyRectangle(Map map, ESRI.ArcGIS.ADF.Web.Geometry.Geometry mapPoly)
    {
        IGISFunctionality gisFunc = map.GetFunctionality("Portland");
        if (gisFunc == null)
            return;
        IGISResource gisresource = gisFunc.Resource;
        bool supportquery = gisresource.SupportsFunctionality(typeof(IQueryFunctionality));
        if (!supportquery)
            return;
        //得到查询功能
        IQueryFunctionality qfunc;
        qfunc = gisresource.CreateFunctionality(typeof(IQueryFunctionality), null) as IQueryFunctionality;
        //得到可查询图层的数组和名称
        string[] lIDs, lNames;
        qfunc.GetQueryableLayers(null, out lIDs, out lNames);

        ESRI.ArcGIS.ADF.Web.SpatialFilter spatialfilter = new ESRI.ArcGIS.ADF.Web.SpatialFilter();
        spatialfilter.ReturnADFGeometries = false;
        spatialfilter.MaxRecords = 1000;//查询最多返回1000条数据
        spatialfilter.Geometry = mapPoly;

        System.Data.DataSet ds = new DataSet();
        for (int i = 0; i < lIDs.Length; i++)
        {
            System.Data.DataTable dt = qfunc.Query(null, lIDs[i], spatialfilter);
            if (dt == null)
                return;
            dt.TableName = lNames[i];
            ds.Tables.Add(dt);
        }
        DataTableCollection dtc = ds.Tables;

　　　//显示结果
        ShowIdentifyResult(map, dtc);

       //高亮显示
        HighLighShow(map, dtc);
    }

上面ShowIdentifyResult方法和HighLighShow方法在点查询里有喔！