以下兩個類對MapXtrme2004 asp.net鷹眼功能進行了完全的封裝。

用法：

?1????????private?void?Page_Load(object?sender,?System.EventArgs?e)
?2????????{
?3????????????//?在此處放置用戶代碼以初始化頁面
?4????????????Overview?oc?=?new?Overview(MapControl1,MapControl2);
?5????????
?6????????????if(!IsPostBack)
?7????????????{
?8????????????????
?9????????????????
10????????????}
11????????}

?

??1/**//*?作者:xiexiaokui
??2?*?時間:2005-10-18
??3?*?功能:asp.net鷹眼
??4?*/
??5using?System;
??6using?MapInfo.Web.UI.WebControls;
??7using?MapInfo.Geometry;
??8using?MapInfo.Styles;
??9using?System.Drawing;
?10using?MapInfo.Data;
?11
?12????/**////?<summary>
?13????///?OverviewTool?的摘要說明。
?14????///?</summary>
?15public?class?OverviewMapToolEventArgs:System.EventArgs
?16{
?17????System.Drawing.Point[]?m_points;
?18????public?OverviewMapToolEventArgs(System.Drawing.Point[]?points)
?19????{
?20????????this.m_points?=?points;
?21????}
?22
?23????public?System.Drawing.Point[]?Points
?24????{
?25????????get
?26????????{
?27????????????return?m_points;
?28????????}
?29????????set
?30????????{
?31????????????m_points?=?value;
?32????????}
?33????}
?34
?35}
?36
?37public?delegate?void?OverviewMapToolEventHandler(object?sender,OverviewMapToolEventArgs?e);
?38
?39
?40public?class?OverviewMapTool:MapTool
?41{
?42????public?static?readonly?string?Toolname?=?"MapInfoWebOverview";
?43????//????public?DPoint?Point1,Point2;
?44
?45????string?m_clientCodeSource;
?46????string?m_clientStartMethod;
?47????string?m_clientStopMethod;
?48????string?m_cursorUrl;
?49????string?m_name;
?50
?51
?52????????public?event?OverviewMapToolEventHandler?OverviewMapToolStop;
?53
?54????????protected?void?OnOverviewMapToolStop(OverviewMapToolEventArgs?e)
?55????????{
?56????????????if(this.OverviewMapToolStop?!=?null)
?57????????????????this.OverviewMapToolStop(this,e);
?58????????}
?59
?60????public?OverviewMapTool()
?61????{
?62????????this.ClientStartMethod?=?"MapInfoWebRectangleStart";
?63????????this.ClientStopMethod?=?"MapInfoWebRectangleStop";
?64????????this.Name?=?Toolname;
?65????}
?66????public?override?string?ClientCodeSource
?67????{
?68????????get
?69????????{
?70????????????return?m_clientCodeSource;
?71????????}
?72????????set
?73????????{
?74????????????m_clientCodeSource?=?value;
?75????????}
?76????}
?77
?78????public?override?string?ClientStartMethod
?79????{
?80????????get
?81????????{
?82????????????return?m_clientStartMethod;
?83????????}
?84????????set
?85????????{
?86????????????m_clientStartMethod?=?value;
?87????????}
?88????}
?89????public?override?string?ClientStopMethod
?90????{
?91????????get
?92????????{
?93????????????return?m_clientStopMethod;
?94????????}
?95????????set
?96????????{
?97????????????m_clientStopMethod?=?value;
?98????????}
?99????}
100????public?override?string?CursorUrl
101????{
102????????get
103????????{
104????????????return?m_cursorUrl;
105????????}
106????????set
107????????{
108????????????m_cursorUrl?=?value;
109????????}
110????}
111????public?override?string?Name
112????{
113????????get
114????????{
115????????????return?m_name;
116????????}
117????????set
118????????{
119????????????m_name?=?value;
120????????}
121????}
122
123
124????public?override?void?Execute(string?dataString,?System.Collections.ArrayList?selLayers,?MapInfo.Mapping.Map?map)
125????{
126????????
127????//????DPoint?dp1,dp2;
128????????System.Drawing.Point[]?points?=?base.ExtractPoints(dataString);
129????//????map.DisplayTransform.FromDisplay(points[0],out?dp1);
130????//????map.DisplayTransform.FromDisplay(points[1],out?dp2);
131????
132????
133????????this.OnOverviewMapToolStop(new?OverviewMapToolEventArgs(points));
134????????//????OverviewMapTool?omt?=?(OverviewMapTool)this.MapControl2.MapTools[MapControl2.MapTools.Count-1];
135????????//????MapInfo.Geometry.DPoint?dp1?=?omt.Point1;
136????????//????MapInfo.Geometry.DPoint?dp2?=?omt.Point2;
137????????//????System.Drawing.Point?p1,p2;
138
139????????//????MapControl2.Map.DisplayTransform.ToDisplay(dp1,out?p1);
140????????//????MapControl2.Map.DisplayTransform.ToDisplay(dp2,out?p2);
141//????????if(Math.Min(Math.Abs(points[0].X-points[1].X),Math.Abs(points[0].Y-points[1].Y))<5)
142//????????{
143//????????????m_mainMapControl.Map.Center?=?dp1;
144//????????}
145//????????else
146//????????{
147//????????????MapInfo.Geometry.DRect?rect?=?new?DRect(dp1,dp2);
148//????????????m_mainMapControl.Map.SetView(rect,m_mainMapControl.Map.GetDisplayCoordSys());?
149//????????}
150
151????}
152
153
154}
155class?Overview
156{
157????
158????MapInfo.Web.UI.WebControls.MapControl?m_mainMapControl;
159????MapInfo.Web.UI.WebControls.MapControl?m_overviewMapControl;
160????public?Overview(MapInfo.Web.UI.WebControls.MapControl?mainMapControl,MapInfo.Web.UI.WebControls.MapControl?overviewMapControl)
161????{
162????????MainMapControl?=?mainMapControl;
163????????OverviewMapControl?=?overviewMapControl;
164????}
165
166????public?MapInfo.Web.UI.WebControls.MapControl?MainMapControl
167????{
168????????get
169????????{
170????????????return?m_mainMapControl;
171????????}
172????????set
173????????{
174????????????m_mainMapControl?=?value;
175????????????m_mainMapControl.PreRender?+=?new?EventHandler(MainMapControl_PreRender);
176????????}
177????}
178????public?MapInfo.Web.UI.WebControls.MapControl?OverviewMapControl
179????{
180????????get
181????????{
182????????????return?m_overviewMapControl;
183????????}
184????????set
185????????{
186????????????
187????????????
188????????????MapInfo.Data.Table?table?=?MapInfo.Engine.Session.Current.Catalog.GetTable("temp_overview");
189????????????m_overviewMapControl?=?value;
190????????????OverviewMapTool?omt?=?new?OverviewMapTool();
191????????????omt.OverviewMapToolStop?+=?new?OverviewMapToolEventHandler(omt_OverviewMapToolStop);
192????????????this.m_overviewMapControl.MapTools.Add(omt);
193????????????this.m_overviewMapControl.MapTools.CurrentTool?=?omt.Name;
194????????????if(table?==?null)
195????????????{
196????????????????
197
198????????????????this.m_overviewMapControl.Map.Load(new?MapInfo.Mapping.MapTableLoader(m_mainMapControl.Map.Layers.GetTableEnumerator()));
199
200????????????????MapInfo.Data.TableInfo?ti?=?MapInfo.Data.TableInfoFactory.CreateTemp("temp_overview");
201????????????????MapInfo.Data.TableSessionInfo?tsi?=?new?MapInfo.Data.TableSessionInfo();
202
203????????????????table?=?MapInfo.Engine.Session.Current.Catalog.CreateTable(ti);
204
205????????????????MapInfo.Mapping.FeatureLayer?fl?=?new?MapInfo.Mapping.FeatureLayer(table);
206????????????????m_overviewMapControl.Map.Layers.Insert(0,fl);
207????????????}
208????????????
209????????}
210????}
211????protected?void?MainMapControl_PreRender(object?sender,?EventArgs?e)
212????{
213????????
214????????DRect?dr?=?this.m_mainMapControl.Map.Bounds;
215????????FeatureGeometry?fg?=?new?MapInfo.Geometry.Rectangle(m_mainMapControl.Map.GetDisplayCoordSys(),dr);
216????????MapInfo.Styles.SimpleLineStyle?sls?=?new?MapInfo.Styles.SimpleLineStyle(new?LineWidth(1,LineWidthUnit.Pixel),2,Color.Red);
217????????MapInfo.Styles.SimpleInterior?si?=?new?MapInfo.Styles.SimpleInterior(1);
218????????MapInfo.Styles.AreaStyle?arst?=?new?MapInfo.Styles.AreaStyle(sls,si);
219????????//????MapInfo.Styles.CompositeStyle?cs?=?new?MapInfo.Styles.CompositeStyle(arst,null,null,null);
220????????MapInfo.Styles.CompositeStyle?cs?=?new?MapInfo.Styles.CompositeStyle(arst);
221????????MapInfo.Data.Feature?f?=?new?Feature(fg,arst);
222
223????????MapInfo.Data.Table?table?=?MapInfo.Engine.Session.Current.Catalog.GetTable("temp_overview");
224????????(table?as?ITableFeatureCollection).Clear();
225????????table.InsertFeature(f);
226????????????
227????????m_overviewMapControl.Map.Layers["temp_overview"].Invalidate();
228????????//table.Refresh();
229????????
230????}
231
232????private?void?omt_OverviewMapToolStop(object?sender,?OverviewMapToolEventArgs?e)
233????{
234????????DPoint?dp1,dp2;
235????????System.Drawing.Point[]?points?=?e.Points;
236????????m_overviewMapControl.Map.DisplayTransform.FromDisplay(points[0],out?dp1);
237????????m_overviewMapControl.Map.DisplayTransform.FromDisplay(points[1],out?dp2);
238????????//????OverviewMapTool?omt?=?(OverviewMapTool)this.MapControl2.MapTools[MapControl2.MapTools.Count-1];
239????????//????MapInfo.Geometry.DPoint?dp1?=?omt.Point1;
240????????//????MapInfo.Geometry.DPoint?dp2?=?omt.Point2;
241????????//????System.Drawing.Point?p1,p2;
242
243????//????MapControl2.Map.DisplayTransform.ToDisplay(dp1,out?p1);
244????//????MapControl2.Map.DisplayTransform.ToDisplay(dp2,out?p2);
245????????if(Math.Min(Math.Abs(points[0].X-points[1].X),Math.Abs(points[0].Y-points[1].Y))<5)
246????????{
247????????????m_mainMapControl.Map.Center?=?dp1;
248????????}
249????????else
250????????{
251????????????MapInfo.Geometry.DRect?rect?=?new?DRect(dp1,dp2);
252????????????m_mainMapControl.Map.SetView(rect,m_mainMapControl.Map.GetDisplayCoordSys());?
253????????}
254????}
255
256}
257
258

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