selecttooltask.cs

C#开发的ArcGIS Server9.2地图选择控件

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing.Design;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using ESRI.ArcGIS.ADF.Web;
using ESRI.ArcGIS.ADF.Web.DataSources;
using ESRI.ArcGIS.ADF.Web.DataSources.Graphics;
using ESRI.ArcGIS.ADF.Web.Display.Graphics;
using ESRI.ArcGIS.ADF.Web.Display.Symbol;
using ESRI.ArcGIS.ADF.Web.Geometry;
using ESRI.ArcGIS.ADF.Web.UI.WebControls;
using ESRI.ArcGIS.ADF.Web.UI.WebControls.Tools;

namespace SelectToolTask
{
    /// <summary>
    /// Allows user to select features on the Map control by drawing a graphic.
    /// </summary>
    [ToolboxData("<{0}:SelectToolTask runat=\"server\" Width=\"200px\" Transparency=\"35\" BackColor=\"White\" TitleBarColor=\"WhiteSmoke\" TitleBarSeparatorLine=\"False\" TitleBarHeight=\"20px\" BorderColor=\"LightSteelBlue\" BorderStyle=\"Outset\" BorderWidth=\"1px\" Font-Names=\"Verdana\" Font-Size=\"8pt\" ForeColor=\"Black\"> </{0}:SelectToolTask>"),
    Designer(typeof(SelectToolTaskDesigner)),
    WebConfigurator(typeof(SelectToolTaskWebConfigurator)),
    System.Drawing.ToolboxBitmap(typeof(SelectToolTask))]
    public class SelectToolTask : FloatingPanelTask
    {
        #region Private members
        Map mapCtrl;
        string mapResMgr;
        private string idStringDelim = "___";
        DropDownList ddlLayerList;
        Toolbar selectToolbar;
        #endregion

        #region Public properties

        /// <summary>
        /// Selection toleratnce around points, in pixels.
        /// </summary>
        [Browsable(true),
        Category("SelectToolTask"),
        DefaultValue(3),
        Description("Tolerance around point selection, in pixels. Must be greater than zero to select features in point and line layers."),
        PersistenceMode(PersistenceMode.Attribute)]
        public int PointSelectionTolerance
        {
            get
            {
                object o = StateManager.GetProperty("selectionTolerance");
                return (o == null) ? 3 : (int)o;
            }
            set
            {
                StateManager.SetProperty("selectionTolerance", value);
            }
        }

        /// <summary>
        /// Whether to make previous selections in the TaskResults invisible
        ///  when the user makes a new selection.
        /// </summary>
        [Browsable(true),
        Category("SelectToolTask"),
        DefaultValue(true),
        Description("Whether to make previous selections in the TaskResults invisible when the user makes a new selection."),
        PersistenceMode(PersistenceMode.Attribute)]
        public bool HidePreviousSelections
        {
            get
            {
                object o = StateManager.GetProperty("hidePreviousSelections");
                return (o == null) ? true : (bool)o;
            }
            set
            {
                StateManager.SetProperty("hidePreviousSelections", value);
            }
        }

        /// <summary>
        /// Whether to render (highlight) all features upon selection. 
        /// If true, individual features may be highlighted by clicking 
        /// feature check-boxes in the Task Results, but the all-feature 
        /// rendering cannot be turned off without also turning off individual highlights.
        /// </summary>
        [Browsable(true),
        Category("SelectToolTask"),
        DefaultValue(true),
        Description("Whether to render (highlight) all features upon selection. If true, individual features may be highlighted by clicking feature check-boxes in the Task Results, but the all-feature rendering cannot be turned off without also turning off individual highlights."),
        PersistenceMode(PersistenceMode.Attribute)]
        public bool RenderSelectedSet
        {
            get
            {
                object o = StateManager.GetProperty("renderAllSelectedFeatures");
                return (o == null) ? true : (bool)o;
            }
            set
            {
                StateManager.SetProperty("renderAllSelectedFeatures", value);
            }
        }

        /// <summary>
        /// Color to render all features in the selected set. 
        /// Used only when RenderAllSelectedFeatures is true.
        /// </summary>
        [Browsable(true),
        Category("SelectToolTask"),
        DefaultValue(typeof(System.Drawing.Color), "Yellow"),
        Description("Color to render all features in the selected set. Used only when RenderAllSelectedFeatures is true."),
        PersistenceMode(PersistenceMode.Attribute)]
        public System.Drawing.Color SelectedSetColor
        {
            get
            {
                object o = StateManager.GetProperty("selectedSetColor");
                return (o == null) ? System.Drawing.Color.Yellow : (System.Drawing.Color)o;
            }
            set
            {
                StateManager.SetProperty("selectedSetColor", value);
            }
        }

        /// <summary>
        /// Title for the item in Task Results. Layer name and number of features is added.
        /// </summary>
        [Browsable(true),
        Category("SelectToolTask"),
        DefaultValue("Selection"),
        Description("Title for the item in Task Results. Layer name and number of features is added."),
        PersistenceMode(PersistenceMode.Attribute)]
        public string ResultsTitle
        {
            get
            {
                object o = StateManager.GetProperty("resultsTitle");
                return (o == null) ? "Selection" : o as string;
            }
            set
            {
                StateManager.SetProperty("resultsTitle", value);
            }
        }

        /// <summary>
        /// Layers that the user may choose from for selection.
        /// Separate names with double colon (::). If null or 
        /// empty (the default), any vector layer may be chosen. If only 
        /// one layer, no layer drop-down choice list is displayed to the user.
        /// </summary>
        [Browsable(true),
        Category("SelectToolTask"),
        DefaultValue(""),
        Description("Layers that the user may choose from for selection. Separate names with double colon (::). If null or empty (the default), any vector layer may be chosen. If only one layer, no layer drop-down choice list is displayed to the user."),
        Editor(typeof(SelectionLayersEditor), typeof(UITypeEditor)),
        PersistenceMode(PersistenceMode.Attribute)]
        public string SelectionLayerNames
        {
            get
            {
                object o = StateManager.GetProperty("selectionLayerNames");
                return (o == null) ? String.Empty : (string)o;
            }
            set
            {
                string names = (value == null) ? String.Empty : value;
                StateManager.SetProperty("selectionLayerNames", names);
            }
        }
        
        /// <summary>
        /// ID of Map control to select from
        /// </summary>
        [Browsable(true),
        Category("SelectToolTask"),
        DefaultValue("Map1"),
        Description("ID of Map control to use for selection. If blank, first map control found is used."),
        Editor(typeof(MapControlEditor), typeof(UITypeEditor)),
        PersistenceMode(PersistenceMode.Attribute)]
        public string Map
        {
            get
            {
                object o = StateManager.GetProperty("map");
                return (o == null) ? "Map1" : o as string;
            }
            set
            {
                StateManager.SetProperty("map", value);
            }
        }

        /// <summary>
        /// Layer to select from.
        /// Set dynamically when user picks layer from dropdownlist, or from 
        /// SelectionLayerIds if only one layer specified.
        /// </summary>
        [Browsable(false)]
        public string SelectLayerId
        {
            get
            {
                object o = StateManager.GetProperty("selectLayerId");
                return (o == null) ? String.Empty : (string)o;
            }
            set
            {
                StateManager.SetProperty("selectLayerId", value);
            }
        }

        /// <summary>
        /// Map resource that contains layer with SelectLayerId.
        /// </summary>
        [Browsable(false)]
        public string SelectMapResource
        {
            get
            {
                object o = StateManager.GetProperty("selectMapResource");
                return (o == null) ? String.Empty : (string)o;
            }
            set
            {
                StateManager.SetProperty("selectMapResource", value);
            }
        }

        /// <summary>
        /// Geometry for selection created by user with SelectTool
        /// </summary>
        protected internal ESRI.ArcGIS.ADF.Web.Geometry.Geometry SelectionGeometry
        {
            get
            {
                Type geomType = StateManager.GetProperty("geometryType") as Type;
                string geomString = StateManager.GetProperty("selectionGeometry") as string;
                if (geomType == null || String.IsNullOrEmpty(geomString)) return null;

                ESRI.ArcGIS.ADF.Web.Geometry.Geometry geom =
                    DeserializeGeometry(geomString, geomType);
                return geom;
            }
            set
            {
                string geomSer = SerializeGeometry(value);
                StateManager.SetProperty("geometryType", value.GetType());
                StateManager.SetProperty("selectionGeometry", geomSer);
            }
        }

        /// <summary>
        /// Used internally to store the current map control height and width
        /// </summary>
        protected internal int MapWidth
        {
            get
            {
                object o = StateManager.GetProperty("mapWidth");
                return (o == null) ? 0 : (int)o;
            }
            set
            {
                StateManager.SetProperty("mapWidth", value);
            }
        }
        protected internal int MapHeight
        {
            get
            {
                object o = StateManager.GetProperty("mapHeight");
                return (o == null) ? 0 : (int)o;
            }
            set
            {
                StateManager.SetProperty("mapHeight", value);
            }
        }


        #endregion

        #region Web control overrides - CreateChildControls, OnPreRender, Rendering

        #region CreateChildControls method
        protected override void CreateChildControls()
        {
            // Note that we do most rendering-related chores in
            // OnPreRender() and RenderContents(). This is more efficient
            // because CreateChildControls runs every callback, whereas
            // rendering methods run only on full postback. We only do
            // what's needed here to add controls so the callback code
            // can work with the controls.

            Controls.Clear();

             // Add drop-down list of layers available for selection
            ddlLayerList = new DropDownList();
            ddlLayerList.ID = ClientID + "_ddlLayerList";
            Controls.Add(ddlLayerList);

            // create toolbar to hold selection button
            // (Note that need to readd toolbar each request in order to find
            //  newly clicked tools)
            selectToolbar = new Toolbar();
            selectToolbar.ID = ClientID + "_selToolbar";
            Controls.Add(selectToolbar);

            base.CreateChildControls();
        }
        #endregion