//新建一个QueryTaskQueryTask queryTask = new QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5");// Query对象Query query = new Query();//传入空间几何范围，可以不设置//合法的geometry类型是Extent, Point, Multipoint, Polyline, Polygonquery.Geometry = geometry;//是否返回查询结果的空间几何信息query.ReturnGeometry = true;//查询结果返回的字段，字段必须在图层中，字段的大小写可忽略query.OutFields.AddRange(new string[] { "AREANAME", "POP2000" });//quer.OutField.Add("*"); //返回所有字段 //查询的where条件，可以是任何合法的SQL语句，可以不设置query.Where = "POP2000 > 350000";//异步查询，需要绑定queryTask的两个事件，通过ExecuteCompleted得到查询结果queryTask.ExecuteCompleted += QueryTask_ExecuteCompleted;queryTask.Failed += QueryTask_Failed;queryTask.ExecuteAsync(query);//同步查询，不需要绑定事件，直接返回查询结果//FeatureSet featureSet = queryTask.Execute(query);

            //新建一个Find taskFindTask findTask = new FindTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/");//异步执行，绑定事件findTask.ExecuteCompleted += FindTask_ExecuteCompleted;findTask.Failed += FindTask_Failed;//初始化FindParameters参数FindParameters findParameters = new FindParameters();findParameters.LayerIds.AddRange(new int[] { 3 }); //查找的图层findParameters.SearchFields.AddRange(new string[] { "NAME" }); //查找的字段范围findParameters.ReturnGeometry = true;findParameters.SearchText = FindTextBox.Text; //查找的“属性值”//设置查询的LayerDefinitionsESRI.ArcGIS.Client.LayerDefinition myDefinition = new ESRI.ArcGIS.Client.LayerDefinition();myDefinition.LayerID = 3;//设置LayerDefinition，属性字段“Name”属于ID为0的图层//LayerDefinition的设置语句和Query中的Where语句一样myDefinition.Definition = "NAME = 'XXX'";//创建一个ObservableCollection，add设置的LayerDefinitionSystem.Collections.ObjectModel.ObservableCollection<LayerDefinition> myObservableCollection =new System.Collections.ObjectModel.ObservableCollection<LayerDefinition>();myObservableCollection.Add(myDefinition);findParameters.LayerDefinitions = myObservableCollection; //设置查询的LayerDefinitions//异步执行findTask.ExecuteAsync(findParameters);

            //新建一个Identify taskIdentifyTask identifyTask = new IdentifyTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer");//异步执行，绑定事件identifyTask.ExecuteCompleted += IdentifyTask_ExecuteCompleted;identifyTask.Failed += IdentifyTask_Failed;//初始化 Identify parametersIdentifyParameters identifyParameters = new IdentifyParameters();identifyParameters.LayerOption = LayerOption.all;//传递地图属性给 identify parametersidentifyParameters.MapExtent = MyMap.Extent;identifyParameters.Width = (int)MyMap.ActualWidth;identifyParameters.Height = (int)MyMap.ActualHeight;//输入的几何参数为一个点，args来自点击事件identifyParameters.Geometry = args.MapPoint; //Point Envelop Extent polyline polygon//设置查询的LayerDefinitionsESRI.ArcGIS.Client.LayerDefinition myDefinition = new ESRI.ArcGIS.Client.LayerDefinition();myDefinition.LayerID = 3;//设置LayerDefinition，属性字段“Name”属于ID为0的图层//LayerDefinition的设置语句和Query中的Where语句一样myDefinition.Definition = "NAME = 'XXX'";//创建一个ObservableCollection，add设置的LayerDefinitionSystem.Collections.ObjectModel.ObservableCollection<LayerDefinition> myObservableCollection =new System.Collections.ObjectModel.ObservableCollection<LayerDefinition>();myObservableCollection.Add(myDefinition);identifyParameters.LayerDefinitions = myObservableCollection; //设置查询的LayerDefinitions//异步执行identifyTask.ExecuteAsync(identifyParameters);