ArcGIS.Server.9.2.DotNet实现点、线、面的MapTips

目的：
1.arcgis server9.2 ADF实现实现点、线、面的MapTips。输入关键字查询出结果，然后给这些结果加上MapTips。
准备工作：
0.参考multimaptips-en.rtf。
1.用ArcGis Server Manager或者ArcCatalog发布一个叫usa的Map Service,并且把这个Service启动起来。
注：要为这个usa的地图添加一个点层名为New_Shapefile，因为maptips控件必须初始设置Layer属性不然会报错，这个控件真是问题多多了。
完成后的效果图：

开始：
1.新建名为myMapTips的ASP.NET Web应用程序，在页面上添加MapResourceManager1、Map1、MapTips1控件、Text1的input(输入查询关键字用)、Button1的input(搜索按钮)。
2.设置MapResourceManager1的属性，这里需要2个MapResourceItem，由上到下分别为maptips、usa。maptips的DataSourceType：GraphicsLayer；usa的DataSourceType：ArcGIS Server Local，就是连接上面发布的usa的Map Service。
3.设置MapTips1控件属性，map="Map1" BodyFormatString="{Id}" HeaderFormatString="{Id}" Layer="MapResourceManager1::usa::New_Shapefile" WhereClause="2>1" 上面的这些属性必须设置不然会报错了，这个控件设计的真是怪，还有一点了要在程序里动态设置MapTips1控件属性并且刷新必须设置 ShowOnlyWhenLayerIsVisible="False"不然也会报错。
4.Button1的input(搜索按钮)，添加onclick事件：search()，其他的控件也做好相应的设置。
5.接下开始代码编写，首先实现ICallbackEventHandler接口，实现GetCallbackResult()和RaiseCallbackEvent(string eventArgument)两方法，具体代码如下：

public partial class TipsPage : System.Web.UI.Page, ICallbackEventHandler
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{
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public string m_Callback = "";
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protected void Page_Load(object sender, EventArgs e)
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{
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m_Callback = Page.ClientScript.GetCallbackEventReference(Page, "argument", "processCallbackResult", "context", "processCallbackError", true);
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}
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ICallbackEventHandler 成员
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private string RaiseCallbackEvent(string _callbackArg)
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{
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return "";
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}

6.切换到html视图编写search()的脚本方法，具体代码如下：

<script>
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//搜索事件
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function search()
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{
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var v=document.getElementById("Text1").value;
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var argument = "ControlID=Map1&ControlType=Map&Type=query&EventArg=" + v;
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var context = "Map";
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var rv=<%= m_Callback %>;
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eval(rv);
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}
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function processCallbackError()
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{
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alert("错误啦！");
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}
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</script>

7.添加上面的代码时必须注意这段代码不能放在head标签内，不然maptips控件会报“控件包含代码块(即 <% ... %>)，因此无法修改控件集合”的错误。再次鄙视一下这个控件。
8.接下来切换cs代码端处理search()的脚本方法发起的请求，具体在RaiseCallbackEvent(string _callbackArg)方法中进行请求处理并且把处理结果返回给客户端，具体代码和说明如下：

private string RaiseCallbackEvent(string _callbackArg)
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{
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CallbackResultCollection m_ADFCallbackResultCollection = new ESRI.ArcGIS.ADF.Web.UI.WebControls.CallbackResultCollection();
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string v = "";
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NameValueCollection keyValColl = CallbackUtility.ParseStringIntoNameValueCollection(_callbackArg);
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if (keyValColl["Type"].ToString() == "query")
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{
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//查询结果数
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int featurecount = 0;
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//获取usa的MapFunctionality、Resource
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ESRI.ArcGIS.ADF.Web.UI.WebControls.Map map = (ESRI.ArcGIS.ADF.Web.UI.WebControls.Map)Map1;
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ESRI.ArcGIS.ADF.Web.DataSources.IMapFunctionality mf = (ESRI.ArcGIS.ADF.Web.DataSources.IMapFunctionality)map.GetFunctionality("usa");
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ESRI.ArcGIS.ADF.Web.DataSources.IGISResource gr = mf.Resource;
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ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality qf;
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string[] lids;
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string[] lnames;
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//创建QueryFunctionality
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qf = (ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality)gr.CreateFunctionality(typeof(ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality), null);
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//查询图层id、名称
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qf.GetQueryableLayers(null, out lids, out lnames);
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//获取maptips的MapFunctionality、Resource
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ESRI.ArcGIS.ADF.Web.DataSources.IMapFunctionality mf_maptips = (ESRI.ArcGIS.ADF.Web.DataSources.IMapFunctionality)map.GetFunctionality("maptips");
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ESRI.ArcGIS.ADF.Web.DataSources.Graphics.MapResource gr_matips = (ESRI.ArcGIS.ADF.Web.DataSources.Graphics.MapResource)mf_maptips.Resource;
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//创建FeatureGraphicsLayer
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ESRI.ArcGIS.ADF.Web.Display.Graphics.FeatureGraphicsLayer gl_maptips = new ESRI.ArcGIS.ADF.Web.Display.Graphics.FeatureGraphicsLayer("maptips", ESRI.ArcGIS.ADF.Web.FeatureType.Point, new ESRI.ArcGIS.ADF.Web.Display.Renderer.SimpleRenderer(ESRI.ArcGIS.ADF.Web.FeatureType.Point, System.Drawing.Color.Red));
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//给新建的FeatureGraphicsLayer添加字段
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gl_maptips.Columns.Add("peid", typeof(Int32));
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gl_maptips.Columns.Add("objectid", typeof(Int32));
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gl_maptips.Columns.Add("name", typeof(string));
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gr_matips.Graphics.Tables.Clear();
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IMapFunctionality pMapfun;
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DataTable dt4 = null;
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ESRI.ArcGIS.ADF.Web.SpatialFilter sfilter = new ESRI.ArcGIS.ADF.Web.SpatialFilter();
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//获取查询关键字
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string Input = keyValColl["EventArg"];
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for (int i = 0; i < lids.Length; i++)
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{
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//设置过滤条件
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sfilter.ReturnADFGeometries = true;
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sfilter.MaxRecords = 100;
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sfilter.Geometry = null;
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sfilter.WhereClause = "NAME LIKE '" + Input + "%'";
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//查询并且把结果放在dt4中
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dt4 = qf.Query(null, lids[i], sfilter);
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if (dt4 != null)
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{
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//累加查询到的结果数
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featurecount += dt4.Rows.Count;
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//对查询到结果进行遍历，更加不同的类型在FeatureGraphicsLayer中生成显示点
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foreach (DataRow dr in dt4.Rows)
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{
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int objectid = Int32.Parse(dr["objectid"].ToString());
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int layerid = Int32.Parse(lids[i]);
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pMapfun = mf;
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if (pMapfun.Resource is ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.MapResourceLocal)
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{
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ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.MapResourceLocal pLocal = pMapfun.Resource as ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.MapResourceLocal;
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ESRI.ArcGIS.Carto.IMapServer pMapServer = (ESRI.ArcGIS.Carto.IMapServer)pLocal.MapServer;
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//获取Objects
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ESRI.ArcGIS.Carto.IMapServerObjects pMapServerObjects = pMapServer as ESRI.ArcGIS.Carto.IMapServerObjects;
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//用Objects的方法获取FeatureLayer
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ESRI.ArcGIS.Carto.IFeatureLayer pFLayer = pMapServerObjects.get_Layer(pMapServer.get_MapName(0), layerid) as ESRI.ArcGIS.Carto.IFeatureLayer;
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ESRI.ArcGIS.Geodatabase.IFeatureClass pFClass = pFLayer.FeatureClass;
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//根据objectid获取Feature
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ESRI.ArcGIS.Geodatabase.IFeature pFeature = pFClass.GetFeature(objectid);
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//获取Geometry
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ESRI.ArcGIS.Geometry.IGeometry pGeometry = pFeature.Shape;
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//查询结果为点的时候
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if (pGeometry.GeometryType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint)
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{
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//新建点并且添加到FeatureGraphicsLayer
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IPoint ippoint = pGeometry as IPoint;
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ESRI.ArcGIS.ADF.Web.Geometry.Point adfpt = ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.Converter.FromIPoint(ippoint);
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DataRow dtr = gl_maptips.Add(adfpt);
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//添加属性值
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try
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{
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dtr["objectid"] = objectid;
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dtr["peid"] = dr["peid"];
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dtr["name"] = dr["name"];
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}
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catch
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{
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dtr["objectid"] = objectid;
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dtr["peid"] = 0;
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dtr["name"] = dr["name"];
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}
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}
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//查询结果为线的时候
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if (pGeometry.GeometryType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline)
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{
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IPolyline ippolyline = pGeometry as IPolyline;
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ESRI.ArcGIS.Geometry.IPointCollection com_pointcollection = (ESRI.ArcGIS.Geometry.IPointCollection)ippolyline;
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ESRI.ArcGIS.ADF.Web.Geometry.Point[] new_adf_points = ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.Converter.FromIPointCollection(com_pointcollection);
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ESRI.ArcGIS.ADF.Web.Geometry.Point adfpt = new ESRI.ArcGIS.ADF.Web.Geometry.Point();
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//获取线的中间一个点
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adfpt = new_adf_points[new_adf_points.Length / 2];
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DataRow dtr = gl_maptips.Add(adfpt);
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try
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{
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dtr["objectid"] = objectid;
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dtr["peid"] = dr["peid"];
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dtr["name"] = dr["name"];
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}
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catch
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{
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dtr["objectid"] = objectid;
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dtr["peid"] = 0;
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dtr["name"] = dr["name"];
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}
115

116

}
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//查询结果为面的时候
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if (pGeometry.GeometryType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon)
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{
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IPolygon ippolygon = pGeometry as IPolygon;
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//面曲线的开始点
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ESRI.ArcGIS.Geometry.IPoint ippoint = ippolygon.FromPoint;
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ESRI.ArcGIS.ADF.Web.Geometry.Point adfpt = ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.Converter.FromIPoint(ippoint);
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DataRow dtr = gl_maptips.Add(adfpt);
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try
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{
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dtr["objectid"] = objectid;
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dtr["peid"] = dr["peid"];
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dtr["name"] = dr["NAME"];
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}
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catch
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{
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dtr["objectid"] = objectid;
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dtr["peid"] = 0;
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dtr["name"] = dr["NAME"];
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}
137

138

}
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}//end if
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}//end foreach
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}
142

143

}// end for
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//把FeatureGraphicsLayer添加到maptips
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gr_matips.Graphics.Tables.Add(gl_maptips);
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if (featurecount > 0)
147

{
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//设置地图视图范围
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ESRI.ArcGIS.ADF.Web.Geometry.Geometry geom;
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ESRI.ArcGIS.ADF.Web.Geometry.Envelope env = new ESRI.ArcGIS.ADF.Web.Geometry.Envelope(double.MaxValue, double.MaxValue, double.MinValue, double.MinValue);
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foreach (DataRow row in gl_maptips.Rows)
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{
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geom = gl_maptips.GeometryFromRow(row);
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env.Union(geom);
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}
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int percent = 20;
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double newwidth, newheight;
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newwidth = map.GetFullExtent().Width * (percent / 100);
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newheight = map.GetFullExtent().Height * (percent / 100);
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env.XMin -= newwidth;
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env.XMax += newwidth;
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env.YMin -= newheight;
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env.YMax += newheight;
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map.Extent = env;
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166

//设置MapTips1的属性
167

MapTips1.FeatureLimit = 20;
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MapTips1.Layer = "MapResourceManager1::maptips::maptips";
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MapResourceManager mr = MapResourceManager1;
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MapTips1.HeaderFormatString = "{objectid}";
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MapTips1.BodyFormatString = "{name}";
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MapTips1.Features = null;
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MapTips1.WhereClause = "2>1";
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MapTips1.Map = map.ClientID;
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//刷新MapTips1
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MapTips1.Refresh();
177

178

m_ADFCallbackResultCollection.Add(MapTips1.CallbackResults[0]);
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m_ADFCallbackResultCollection.Add(Map1.CallbackResults[0]);
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}
181

}
182

183

return m_ADFCallbackResultCollection.ToString();
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}

9.这样完成了代码编写，可以运行测试查看效果。