Arcgis server .net(vs2003) 繪製直線, 折線,多邊形的方法(webgis)

1. 繪直線

     private void Map1_Line(object sender, LineEventArgs args)
  {
  
   if (args.ToolName == "Line")
   {
    IFeatureLayer flayer = GetFeatureLayer(ddlLayers.SelectedIndex);        //獲取當前活動圖層了函數,就是調用GetFeatureLayer(int lyid)函數
    if (flayer == null) return;
    
    if (flayer.FeatureClass.ShapeType != ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline)
    {
     string sc;
     sc = "<script language=javascript>alert('當前圖層類型不對！')</script>";
     Page.RegisterClientScriptBlock("ShapeTypeError",sc);
     return;
    }

    //生成直線
    ESRI.ArcGIS.Server.IServerContext context;
    ESRI.ArcGIS.Server.WebControls.WebMap webmap = Map1.CreateWebMap();
    webmap.ManageLifetime(flayer);
    context = webmap.ServerContext;
    ESRI.ArcGIS.Geometry.IPolyline Polyline = context.CreateObject("esriGeometry.Polyline") as ESRI.ArcGIS.Geometry.IPolyline;
    webmap.ManageLifetime(Polyline);
    ESRI.ArcGIS.Geometry.IPoint pt;

    ESRI.ArcGIS.Geometry.IGeometryCollection ringcol = context.CreateObject("esriGeometry.Polyline") as ESRI.ArcGIS.Geometry.IGeometryCollection;
    webmap.ManageLifetime(ringcol);

    ESRI.ArcGIS.Geometry.IPointCollection ptcol =context.CreateObject("esriGeometry.Path") as ESRI.ArcGIS.Geometry.IPointCollection;// new PathClass();
    webmap.ManageLifetime(ptcol);
    object obj=Type.Missing;

    
    pt = webmap.ToMapPoint(args.BeginPoint.X,args.BeginPoint.Y);
    ptcol.AddPoint(pt,ref obj,ref obj);

    pt = webmap.ToMapPoint(args.EndPoint.X,args.EndPoint.Y);
    ptcol.AddPoint(pt,ref obj,ref obj);

    
    ringcol.AddGeometry(ptcol as IGeometry,ref obj,ref obj);    
    Polyline =ringcol as IPolyline;    

    //將多直線到圖層中
    ESRI.ArcGIS.Geodatabase.IFeature feature =  flayer.FeatureClass.CreateFeature();
    feature.Shape = Polyline as IGeometry;
    feature.Store();
    webmap.Refresh();

    webmap.Dispose();
   }

  }

  2. 繪折線

private void Map1_Polyline(object sender, PolylineEventArgs args)
  {
   if (args.ToolName == "Polyline")
   {
    IFeatureLayer flayer = GetFeatureLayer(ddlLayers.SelectedIndex);        //獲取當前活動圖層了函數，就是調用GetFeatureLayer(int lyid)函數
    if (flayer == null) return;
    
    if (flayer.FeatureClass.ShapeType != ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline)
    {
     string sc;
     sc = "<script language=javascript>alert('當前圖層類型不對！')</script>";
     Page.RegisterClientScriptBlock("ShapeTypeError",sc);
     return;
    }

    //生成直線
    ESRI.ArcGIS.Server.IServerContext context;
    ESRI.ArcGIS.Server.WebControls.WebMap webmap = Map1.CreateWebMap();
    webmap.ManageLifetime(flayer);
    context = webmap.ServerContext;
    ESRI.ArcGIS.Geometry.IPolyline Polyline = context.CreateObject("esriGeometry.Polyline") as ESRI.ArcGIS.Geometry.IPolyline;
    webmap.ManageLifetime(Polyline);
    ESRI.ArcGIS.Geometry.IPoint pt;

    ESRI.ArcGIS.Geometry.IGeometryCollection ringcol = context.CreateObject("esriGeometry.Polyline") as ESRI.ArcGIS.Geometry.IGeometryCollection;
    webmap.ManageLifetime(ringcol);

    ESRI.ArcGIS.Geometry.IPointCollection ptcol =context.CreateObject("esriGeometry.Path") as ESRI.ArcGIS.Geometry.IPointCollection;// new PathClass();
    webmap.ManageLifetime(ptcol);
    object obj=Type.Missing;

    for (int i=0;i<=args.Vectors.Length-1;i++)
    {
     pt = webmap.ToMapPoint(args.Vectors[i].X,args.Vectors[i].Y);
     ptcol.AddPoint(pt,ref obj,ref obj);
    }
    ringcol.AddGeometry(ptcol as IGeometry,ref obj,ref obj);    
    Polyline =ringcol as IPolyline;    

    //將折線保存到圖層中
    ESRI.ArcGIS.Geodatabase.IFeature feature =  flayer.FeatureClass.CreateFeature();
    feature.Shape = Polyline as IGeometry;
    feature.Store();
    webmap.Refresh();

    webmap.Dispose();
   }

  }

  3. 繪多邊形

private void Map1_Polygon(object sender, PolygonEventArgs args)
  {
   if (args.ToolName == "Polygon")
   {
    IFeatureLayer flayer = GetFeatureLayer(ddlLayers.SelectedIndex);        //獲取當前活動圖層了函數，就是調用GetFeatureLayer(int lyid)函數
    if (flayer == null) return;
    
    if (flayer.FeatureClass.ShapeType != ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon)
    {
     string sc;
     sc = "<script language=javascript>alert('當前圖層類型不對！')</script>";
     Page.RegisterClientScriptBlock("ShapeTypeError",sc);
     return;
    }

    //生成多邊形
    ESRI.ArcGIS.Server.IServerContext context;
    ESRI.ArcGIS.Server.WebControls.WebMap webmap = Map1.CreateWebMap();
    webmap.ManageLifetime(flayer);
    context = webmap.ServerContext;
    ESRI.ArcGIS.Geometry.IPolygon poly = context.CreateObject("esriGeometry.Polygon") as ESRI.ArcGIS.Geometry.IPolygon; //'new ag.PolygonClass();
    webmap.ManageLifetime(poly);
    ESRI.ArcGIS.Geometry.IPoint pt;
    ESRI.ArcGIS.Geometry.IGeometryCollection ringcol = context.CreateObject("esriGeometry.Polygon") as ESRI.ArcGIS.Geometry.IGeometryCollection;// new  PolygonClass();
    webmap.ManageLifetime(ringcol);
    ESRI.ArcGIS.Geometry.IPointCollection ptcol =context.CreateObject("esriGeometry.Ring") as ESRI.ArcGIS.Geometry.IPointCollection;// new RingClass();
    webmap.ManageLifetime(ptcol);
    object obj=Type.Missing;
    for (int i=0;i<=args.Vectors.Length-1;i++)
    {
     pt = webmap.ToMapPoint(args.Vectors[i].X,args.Vectors[i].Y);
     ptcol.AddPoint(pt,ref obj,ref obj);
    }
    ringcol.AddGeometry(ptcol as IGeometry,ref obj,ref obj);    
    poly = ringcol as IPolygon;    

    //將多邊形寫入到圖層中
    ESRI.ArcGIS.Geodatabase.IFeature feature =  flayer.FeatureClass.CreateFeature();
    feature.Shape = poly as IGeometry;
    feature.Store();
    webmap.Refresh();

    webmap.Dispose();
   }

  }

4. GetFeatureLayer(int lyid) 函數

private IFeatureLayer GetFeatureLayer(int lyid)
  {
   WebMap webmap = Map1.CreateWebMap();
   try
   {
    ILayer layer = (webmap.MapServer as IMapServerObjects).get_Layer(webmap.DataFrame,lyid);
    if (layer==null)
     return null;
    else
    {
     return (layer as IFeatureLayer);
    }
   }
   finally
   {
    webmap.Dispose();
   }
      
  }

5. 工作區編輯函數 StartEdit()

private void StartEdit()
  {
    
  
   using (WebMap webMap =Map1.CreateWebMap() )
   {
    IServerContext sc=webMap.ServerContext;

    IMapServer map = sc.ServerObject as IMapServer;
    IMapServerObjects mapobj = map as IMapServerObjects;
    IMap fgmap = mapobj.get_Map(webMap.DataFrame);
    IFeatureLayer fl = fgmap.get_Layer(ddlLayers.SelectedIndex) as IFeatureLayer;
    IDataset ds = fl.FeatureClass as IDataset;
    IWorkspaceEdit ws = ds.Workspace as IWorkspaceEdit;

    ws.StartEditing(true);
    ws.StartEditOperation();

    
   }

  
   }
6. 工作區停止編輯數據保存函數SaveEdit();

private void SaveEdit()
  {
   using (WebMap webMap =Map1.CreateWebMap() )
   {
    IServerContext sc=webMap.ServerContext;

    IMapServer map = sc.ServerObject as IMapServer;
    IMapServerObjects mapobj = map as IMapServerObjects;
    IMap fgmap = mapobj.get_Map(webMap.DataFrame);
    IFeatureLayer fl = fgmap.get_Layer(ddlLayers.SelectedIndex) as IFeatureLayer;
    IDataset ds = fl.FeatureClass as IDataset;
    IWorkspaceEdit ws = ds.Workspace as IWorkspaceEdit;
    ws.StartEditOperation();
    ws.StopEditing(true);
   }

  }
7. 繪圖方法初始化設置

private void InitializeComponent()
  {    
   this.Toolbar1.CommandClick += new ESRI.ArcGIS.Server.WebControls.ToolbarCommandClickEventHandler(this.Toolbar1_CommandClick);
   this.Map1.Polygon += new ESRI.ArcGIS.Server.WebControls.MapPolygonEventHandler(this.Map1_Polygon);
   this.Map1.Polyline += new ESRI.ArcGIS.Server.WebControls.MapPolylineEventHandler(this.Map1_Polyline);
   this.Map1.Line += new ESRI.ArcGIS.Server.WebControls.MapLineEventHandler(this.Map1_Line);
   this.Load += new System.EventHandler(this.Page_Load);
   this.Map1.Point+=new MapPointEventHandler(Map1_Point);

  }