ArcGIS Server 9.2 中的属性查询

该例子可动态设置图层，调整查询要素，基本代码如下：
    protected void Button1_Click(object sender, EventArgs e)
    {
        ESRI.ArcGIS.ADF.Web.DataSources.IMapFunctionality mf = (ESRI.ArcGIS.ADF.Web.DataSources.IMapFunctionality)Map1.GetFunctionality(2);

        ESRI.ArcGIS.ADF.Web.DataSources.IGISResource gisresource = mf.Resource;
        bool supported = gisresource.SupportsFunctionality(typeof(ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality));

        if (supported)
        {
            ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality qfunc = (ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality)gisresource.CreateFunctionality(typeof(ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality), null);

            string[] lids;
            string[] lnames;
            qfunc.GetQueryableLayers(null, out lids, out lnames);

            int layer_index = 0;
            for (int i = 0; i < lnames.Length; i++)
            {
                if (lnames[i] == "sde_DBO_xiangzheng")
                {
                    layer_index = i;
                    break;
                }
            }

            ESRI.ArcGIS.ADF.Web.SpatialFilter spatialfilter = new ESRI.ArcGIS.ADF.Web.SpatialFilter();
            spatialfilter.ReturnADFGeometries = true;
            spatialfilter.MaxRecords = 1000;
            spatialfilter.WhereClause = "BJAREA=13";

            System.Data.DataTable datatable = qfunc.Query(null, lids[layer_index], spatialfilter);

            //*** To use the ADF Converter to create a Graphics layer from DataTable, use the following code
            ESRI.ArcGIS.ADF.Web.Display.Graphics.GraphicsLayer graphicslayer = ESRI.ArcGIS.ADF.Web.UI.WebControls.Converter.ToGraphicsLayer(datatable, System.Drawing.Color.Yellow, System.Drawing.Color.Green);
            IEnumerable gfc = Map1.GetFunctionalities();
            ESRI.ArcGIS.ADF.Web.DataSources.Graphics.MapResource gResource = null;
            foreach (ESRI.ArcGIS.ADF.Web.DataSources.IGISFunctionality gfunc in gfc)
            {
                if ((gfunc.Resource is ESRI.ArcGIS.ADF.Web.DataSources.Graphics.MapResource) && (gfunc.Resource.Name == "Selection"))
                {
                    gResource = (ESRI.ArcGIS.ADF.Web.DataSources.Graphics.MapResource)gfunc.Resource;
                    gResource.Graphics.Tables.Clear();
                }
            }

            if (gResource == null)
                return;

            gResource.Graphics.Tables.Add(graphicslayer);
            if (Map1.ImageBlendingMode == ImageBlendingMode.WebTier)
            {
                Map1.Refresh();
            }
            else if (Map1.ImageBlendingMode == ImageBlendingMode.Browser)
            {
                Map1.RefreshResource(gResource.Name);
            }
        }
    }

实现效果：