ArcGIS Server点击查询

ArcGIS Server点击查询

（1）创建新类，类名为 IdentifyPopTool ，并实现IMapServerToolAction接口

public class IdentifyPopUpTool : IMapServerToolAction
    {
        #region IMapServerToolAction Members
        void IMapServerToolAction.ServerAction(ToolEventArgs args)
        {
            ESRI.ArcGIS.ADF.Web.UI.WebControls.Map map = (ESRI.ArcGIS.ADF.Web.UI.WebControls.Map)args.Control;
            PointEventArgs pea = (PointEventArgs)args;
            System.Drawing.Point peanut = pea.ScreenPoint;
            ESRI.ArcGIS.ADF.Web.Geometry.Point point = ESRI.ArcGIS.ADF.Web.Geometry.Point.ToMapPoint(peanut.X, peanut.Y, map.Extent, (int)map.Width.Value, (int)map.Height.Value);
            System.Data.DataSet dataset = new System.Data.DataSet();
            string sourcelayername = "City";
            IEnumerable func_enum = map.GetFunctionalities();
            //如果查询结果用TaskResult、GridResullt等窗口显示时，Server会自动产生一个GraphicsLayer，所以需要遍历Functionality，以获取相应IGISFunctionality进行查询
            foreach (ESRI.ArcGIS.ADF.Web.DataSources.IGISFunctionality gisfunctionality in func_enum)
            {
                ESRI.ArcGIS.ADF.Web.DataSources.IGISResource gisresource = gisfunctionality.Resource;
                if (gisresource is ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.MapResourceLocal)
                {
                    bool supportquery = gisresource.SupportsFunctionality(typeof(ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality));
                    if (supportquery)
                    {
                        ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality qfunc;
                        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] == sourcelayername) {
                                if (lids[i] is string) {
                                    if (!int.TryParse((string)lids[i], out layer_index))
                                        layer_index = i;
                                }
                                else {
                                    layer_index = i;
                                }
                                break;
                            }
                        }
                        string[] lids1 = new string[1];
                        lids1[0] = layer_index.ToString();
                        System.Data.DataTable[] qdatatable = null;
                        qdatatable = qfunc.Identify(null, point, 3, ESRI.ArcGIS.ADF.Web.IdentifyOption.TopMostLayer, lids1);                //查询特定层
                        if (qdatatable == null)
                            break;
                        System.Data.DataTable dtable = qdatatable[0];
                        string strID = (string)dtable.Rows[0]["XMBH"];
                        string strName = (string)dtable.Rows[0]["XMMC"];
                        CallbackResult cr2 = new CallbackResult(null, null, "javascript", "showDetail('" + strID + "','" + strName + "','" + peanut.X.ToString() + "','" + peanut.Y.ToString() + "');");
                        map.CallbackResults.Add(cr2);
                    }
                }
            }

            object[] oa = new object[1];
            string sa = "map.divObject.style.cursor = map.cursor";
            oa[0] = sa;
            CallbackResult cr1 = new CallbackResult(null, null, "javascript", oa);
            map.CallbackResults.Add(cr1);
        }
        #endregion
    }

（2）设置查询GIS工具按钮

<esri:Tool DefaultImage="~/Images/identify.png" JavaScriptFile="" ServerActionAssembly="App_Code" HoverImage="~/Images/identify_HOVER.gif" ServerActionClass="CustomToolLibrary.IdentifyPopUpTool" ClientAction="Point" ToolTip="点击查询要素" SelectedImage="~/Images/identify_ON.gif" Name="点击查询"></esri:Tool>