mapinfo开发 >> 完整的MapXtreme例子
最后编辑时间：2021年07月23日 17:30:46【内容简介】using System ; using System . Collections ; using System . ComponentModel ; using System . Data ; using System . Drawing ; using System . Web ; using System . Web . SessionState ; using System . Web . UI ; using System . Web . UI . WebControls ; using System . Web . UI . HtmlControls ; using MapInfo ; using MapInfo . Data . Find ; using MapInfo . Data ; using MapInfo . Geometry ; using MapInfo . Styles ; using MapInfo . Mapping . Thematics ; using MapInfo . Mapping ; using MapInfo . Mapping . Le
using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Drawing;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;using MapInfo;using MapInfo.Data.Find;using MapInfo.Data;using MapInfo.Geometry;using MapInfo.Styles;using MapInfo.Mapping.Thematics;using MapInfo.Mapping ;using MapInfo.Mapping.Legends ;using MapInfo.WebControls;namespace HelloWorldWeb{/// <summary>/// Summary description for WebForm1./// </summary>public partial class WebForm1 : System.Web.UI.Page{protected void Page_Load(object sender, System.EventArgs e){MapInfo.Mapping.Map myMap = GetMapObj();if(myMap == null) return;// The first time inif (Session.IsNewSession){//******************************************************************************////* You need to follow below lines in your own application. *////* You don't need this state manager if the "MapInfo.Engine.Session.State" *////* in the web.config is not set to "Manual" *////******************************************************************************//if(AppStateManager.IsManualState()){AppStateManager stateManager = new AppStateManager();// tell the state manager which map alias you want to use.// You could also add your own key/value pairs, the value should be serializable.stateManager.ParamsDictionary[AppStateManager.ActiveMapAliasKey] = this.MapControl1.MapAlias;// Put state manager into HttpSession, so we could get it later on.AppStateManager.PutStateManagerInSession(stateManager);}// Initial state.InitState();}// Restore state.if(AppStateManager.IsManualState()){AppStateManager.GetStateManagerFromSession().RestoreState();}// Add a north arrow IAdornment into the map's adornments collection.AddNorthArrowAdornment(myMap);}private void AddNorthArrowAdornment(Map myMap){if(myMap == null) return;// don't create a new NorthArrowAdornment object if there is one in the map, because it is same for all requests,// and we don't want to create a new one when we could use the old one.if(myMap.Adornments["north_arrow"] == null){string path = HttpContext.Current.Server.MapPath(string.Format("MapXtremeWebResources", MapInfo.Engine.ProductInfo.MajorVersion, MapInfo.Engine.ProductInfo.MinorVersion));string northFile = System.IO.Path.Combine(path, "northarrow.bmp");myMap.Adornments.Append(new NorthArrowAdornment(myMap.Alias, new Size(100, 100), "north_arrow", "aaaa", northFile));}}private void Page_UnLoad(object sender, System.EventArgs e){if(AppStateManager.IsManualState()){AppStateManager.GetStateManagerFromSession().SaveState();}}private void InitState(){MapInfo.Mapping.Map myMap = this.GetMapObj();if(Application.Get("HelloWorldWeb") == null){System.Collections.IEnumerator iEnum = MapInfo.Engine.Session.Current.MapFactory.GetEnumerator();// Put each map's Layers into a byte[] and keep them in HttpApplicationState for the original layers state.while(iEnum.MoveNext()){MapInfo.Mapping.Map tempMap = iEnum.Current as MapInfo.Mapping.Map;byte[] lyrsBits = MapInfo.WebControls.ManualSerializer.BinaryStreamFromObject(tempMap.Layers);Application.Add(tempMap.Alias + "_layers", lyrsBits);}// this is a marker key/value only.Application.Add("HelloWorldWeb", "Here");}else{// Set the initial Layers of the map because below reasons:// 1. There is a LayerControl in the web form.// 2. Pooled MapInfo Session objects.// 3. Settings of IMapLayer of the map which is from Pooled Session may not be the one you want.// 4. There is Layers collection with initial state stored in Application level with byte[] format.Object obj = Context.Application[myMap.Alias + "_layers"];// if we found out there is correct Layers collection stored in Application level.if(obj != null){// deserialization applys "original layers setting" to the one in the current map.// "Object tempObj" is only for compiling purpose, otherwise it is useless, // because MapXtreme object's deserialization process will put MapXtreme object back to the place it belongs to.Object tempObj = MapInfo.WebControls.ManualSerializer.ObjectFromBinaryStream(obj as byte[]);}}// Set the initial state of the map// This step is needed because you may get a dirty map from mapinfo Session.Current which is retrived from session pool.myMap.Zoom = new MapInfo.Geometry.Distance(25000, DistanceUnit.Mile);myMap.Center = new DPoint(27775.805792979896,-147481.33999999985);}private Map GetMapObj(){// Get the mapMapInfo.Mapping.Map myMap = MapInfo.Engine.Session.Current.MapFactory[MapControl1.MapAlias];if(myMap == null){myMap = MapInfo.Engine.Session.Current.MapFactory[0];}return myMap;}#region Web Form Designer generated codeoverride protected void OnInit(EventArgs e){//// CODEGEN: This call is required by the ASP.NET Web Form Designer.//InitializeComponent();this.Unload += new System.EventHandler(this.Page_UnLoad);base.OnInit(e);}/// <summary>/// Required method for Designer support - do not modify/// the contents of this method with the code editor./// </summary>private void InitializeComponent(){ }#endregion}}分享到： 豆瓣 新浪微博 百度贴吧 QQ空间 QQ好友
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