ArcGIS Server标注功能

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更多发布于：2008-07-07 18:35

饮食场所地图标注服务功能，即当客户端人员进行属性查询或者空间查询后，如果想进一步获取更加详细的信息，则点击电子地图中其位置图标，则页面将显
示企业的具体信息，如特色菜、详细介绍等。还可以通过移动、放大、缩小查看该饮食场所的周边信息。系统的后续工作还将进一步扩展此项相关功能，如到达该地
点的公交线路等。图１为系统界面图。
 <a href="http://www.cnblogs.com/images/cnblogs_com/chinazhousheng/WindowsLiveWriter/ArcGISServer_13DF3/DD6644C465AE%7D_2.jpg" target="_blank" ><img alt="DD6644C465AE}" src="http://www.cnblogs.com/images/cnblogs_com/chinazhousheng/WindowsLiveWriter/ArcGISServer_13DF3/DD6644C465AE%7D_thumb.jpg" border="0" width="372" height="372"></a> 
　　　　　　　　　<图１> 
图中彩色块体为目标点击物，左键点击后，系统界面的右边将出现其详细信息。如图２
<a href="http://www.cnblogs.com/images/cnblogs_com/chinazhousheng/WindowsLiveWriter/ArcGISServer_13DF3/2_2.jpg" target="_blank" ><img alt="2" src="http://www.cnblogs.com/images/cnblogs_com/chinazhousheng/WindowsLiveWriter/ArcGISServer_13DF3/2_thumb.jpg" border="0" width="471" height="312"></a> 
　　　　　　　　　<图2> 
　　实现原理为: 
（１）在工具栏中加入一个工具按钮。
　　（２）服务器代码方面，首先查找要查询的图层，并将当前点转化成MapPoint
　　（３）关键在于使用以上条件，并采用方法IQueryFunctionality.Identify获取到数据集
　　（４）适当处理，将信息显示在页面上。 
整个例子采用Ajax效果,达到无刷新效果,虽然没有Google的酷,但我相信,大家处理一下,采用层的显示是完全可以达到它的效果的. using System.Drawing; using System.Collections; using System.Collections.Generic; using ESRI.ArcGIS; using ESRI.ArcGIS.ADF.Web; using ESRI.ArcGIS.ADF.Web.DataSources; using ESRI.ArcGIS.ADF.Web.Display.Graphics; using ESRI.ArcGIS.ADF.Web.UI.WebControls; using ESRI.ArcGIS.ADF.Web.UI.WebControls.Tools; using System.Data; using System; using System.Web.UI.WebControls; using System.Web.UI; using ESRI.ArcGIS.ADF.Web.UI.WebControls; using ESRI.ArcGIS.ADF.Web; using ESRI.ArcGIS.ADF; using ESRI.ArcGIS.ADF.Web.DataSources; using ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer; using ESRI.ArcGIS.ADF.Web.DataSources.Graphics; using ESRI.ArcGIS.ADF.ArcGISServer; using ESRI.ArcGIS.Geometry; using ESRI.ArcGIS.Server; using ESRI.ArcGIS.Geodatabase; using ESRI.ArcGIS.ADF.Connection; /**//// <summary> /// MapIdentify 的摘要说明 /// </summary> public class MapIdentify :IMapServerToolAction { public MapIdentify() { // // TOD 在此处添加构造函数逻辑 // } IMapServerToolAction 成员#region IMapServerToolAction 成员 public DataRow minus_row; public void ServerAction(ToolEventArgs args) { Map mapctrl = null; mapctrl = (Map)args.Control; IEnumerable func_enum = null; func_enum =mapctrl.GetFunctionalities(); System.Data.DataTable datatable = null; PointN txt_Point = new PointN(); // string name_eat = "null"; foreach (ESRI.ArcGIS.ADF.Web.DataSources.IMapFunctionality gisfunctionality in func_enum) { //对特定的数据库图层进行查询 if (gisfunctionality.Resource.Name == "CsMap") { ESRI.ArcGIS.ADF.Web.DataSources.IMapResource gResource; gResource = (ESRI.ArcGIS.ADF.Web.DataSources.IMapResource)gisfunctionality.Resource; bool supported = false; ESRI.ArcGIS.ADF.Web.DataSources.IGISResource gisresource = null; gisresource = gisfunctionality.Resource; supported = gisresource.SupportsFunctionality(typeof(ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality)); //如果支持 if (supported) { 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); //获取屏幕点 ESRI.ArcGIS.ADF.Web.Geometry.Point pnt = new ESRI.ArcGIS.ADF.Web.Geometry.Point() ; ESRI.ArcGIS.ADF.Web.UI.WebControls.PointEventArgs ptargs = null; ptargs = (PointEventArgs)args; pnt= ESRI.ArcGIS.ADF.Web.Geometry.Point.ToMapPoint(ptargs.ScreenPoint.X,ptargs.ScreenPoint.Y, mapctrl.Extent, (int)mapctrl.Width.Value, (int)mapctrl.Height.Value); System.Data.DataTable[] qdatatables = qfunc.Identify(null, pnt, 1, ESRI.ArcGIS.ADF.Web.IdentifyOption.AllLayers, lids); //将指点的图层的表格数据赋给表 datatable = qdatatables[3];//为饮食所在图层 double pnt_xy = pnt.X + pnt.Y; double minus_xy = 0; double add_xy; int first_row=0; //判断是否是第一行,为0为第一行;为1表示为其他行; 获取点的坐标#region 获取点的坐标 DataRowCollection drs = datatable.Rows; int shpind = -1; for (int i = 0; i < datatable.Columns.Count; i++) { if (datatable.Columns.DataType == typeof(ESRI.ArcGIS.ADF.Web.Geometry.Geometry)) { shpind = i; break; } } try { foreach (DataRow dr in drs) { //ESRI.ArcGIS.ADF.Web.Geometry.Multipoint geom = (ESRI.ArcGIS.ADF.Web.Geometry.Multipoint)dr[shpind]; //ESRI.ArcGIS.ADF.Web.Geometry.PointCollection pointcol = geom.Points; //txt_Point.X = pointcol[0].X; //txt_Point.Y = pointcol[0].Y; ESRI.ArcGIS.ADF.Web.Geometry.Point geom = (ESRI.ArcGIS.ADF.Web.Geometry.Point)dr[shpind]; //add_xy=pointcol[0].X+pointcol[0].Y; add_xy = geom.X + geom.Y; if(first_row==0) { minus_xy = System.Math.Abs(add_xy-pnt_xy); minus_row = dr; first_row = 1; name_eat = minus_row["餐饮店名称"].ToString(); } else if(System.Math.Abs(pnt_xy-add_xy)<minus_xy) { minus_xy = System.Math.Abs(pnt_xy - add_xy); minus_row = dr; name_eat = minus_row["餐饮店名称"].ToString(); } } } catch (Exception q) { } #endregion if (gResource == null) return; // // GridView gdview = (GridView)mapctrl.Page.FindControl("GridView1"); //TextBox txt_name = (TextBox)mapctrl.Page.FindControl("FloatingPanel9$Txt_Name"); //设置图片 System.Web.UI.WebControls.Image Image1 = (System.Web.UI.WebControls.Image)mapctrl.Page.FindControl("Image1"); //Image1.ImageUrl = "~/Img/images_sk.jpg";//huogongdian Image1.ImageUrl = "~/Img/huogongdian.jpg"; Image1.Visible = true; //设置label Label eat_name = (Label)mapctrl.Page.FindControl("eat_name"); eat_name.Text = " ;nbsp;;nbsp;;nbsp;;nbsp;餐饮名称：" + name_eat + " "; eat_name.Visible = true; // Label eat_cai = (Label)mapctrl.Page.FindControl("eat_cai"); eat_cai.Text = " ;nbsp;;nbsp;;nbsp;;nbsp;特色菜系：" + minus_row["特色菜"].ToString() + " "; // Label eat_demo = (Label)mapctrl.Page.FindControl("eat_demo"); eat_demo.Text = " ;nbsp;;nbsp;;nbsp;;nbsp;详细介绍：" + minus_row["详细介绍"].ToString() + " "; // Label eat_tel = (Label)mapctrl.Page.FindControl("eat_tel"); eat_tel.Text = " ;nbsp;;nbsp;;nbsp;;nbsp;订餐热线：" + minus_row["订餐热线"].ToString() + " "; Label eat_recom = (Label)mapctrl.Page.FindControl("eat_recom"); eat_recom.Text = " ;nbsp;;nbsp;;nbsp;;nbsp;推荐指数：" + minus_row["推荐数"].ToString() + " "; object[] oa = new object[1]; string showtable = "'visible'"; //设置数据源 // gdview.DataSource = datatable; //gdview.DataBind(); // txt_name.Text = datatable.Rows[0]["NAME"].ToString(); // txt_name.Visible = true; string returnstring = null; using (System.IO.StringWriter sw = new System.IO.StringWriter()) { HtmlTextWriter htw = new HtmlTextWriter(sw); // txt_name.RenderControl(htw); // gdview.RenderControl(htw); Image1.RenderControl(htw); eat_name.RenderControl(htw); eat_cai.RenderControl(htw); eat_tel.RenderControl(htw); eat_demo.RenderControl(htw); htw.Flush(); returnstring = sw.ToString(); } CallbackResult cr = new CallbackResult("div", "identify", "innercontent", returnstring); mapctrl.CallbackResults.Add(cr); CallbackResult cr1 = new CallbackResult("div", "img_div", "innercontent", returnstring); mapctrl.CallbackResults.Add(cr1); CallbackResult cr2 = new CallbackResult("div", "img_lab", "innercontent", returnstring); mapctrl.CallbackResults.Add(cr2); if (datatable.Rows.Count > 0) { showtable = "'visible'"; } else { showtable = "'hidden'"; } // 设置griddiv是否显示 string sa = "var griddiv = document.getElementById('identify');"; sa += "griddiv.style.visibility = " + showtable + ";"; oa[0] = sa; CallbackResult cr4 = new CallbackResult(null, null, "javascript", oa); mapctrl.CallbackResults.Add(cr1); if (mapctrl.ImageBlendingMode == ImageBlendingMode.WebTier) { mapctrl.Refresh(); } else if (mapctrl.ImageBlendingMode == ImageBlendingMode.Browser) { mapctrl.RefreshResource(gResource.Name); } } } } } #endregion }

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