Arc Engine 中添加气泡提示框

 

已知若干点的经纬度坐标，要求在地图中进行定位：

1.通过Tool 》Add X Y data 定位点，注意选择地理坐标系下的wgs 1984坐标系；

2.定位后的点不能执行查询、分析等操作，需要重新export data；

3.导出的数据最好转换成投影坐标，以便于计算。可首先把已知投影坐标的图层加载到地图中，然后加入第二步产生的点图层，然后将点图层export data，注意坐标系统选择“the data frame”

 

二、在ArcObject开发时定位的代码示例

2.1 代码参考1

 private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
        {
       
            if (i >= 3)//测试目的
                return;
            i++;

            ITextElement te = createTextElement(e.mapX,e.mapY,"魁x");
            axMapControl1.ActiveView.GraphicsContainer.AddElement(te as IElement, 1);
            axMapControl1.Refresh(esriViewDrawPhase.esriViewGraphics, null, null);

    
        }
        int i;

        public IBalloonCallout createBalloonCallout(double x, double y)
        {
            IRgbColor rgb = new RgbColorClass();
            {
                rgb.Red = 255;
                rgb.Green = 255;
                rgb.Blue = 200;

            }
            ISimpleFillSymbol sfs = new SimpleFillSymbolClass();
            {
                sfs.Color = rgb;
                sfs.Style = esriSimpleFillStyle.esriSFSSolid;
            }

            IPoint p = new PointClass();
            {
                p.PutCoords(x, y);
            }

            IBalloonCallout bc = new BalloonCalloutClass();
            {
                bc.Style = esriBalloonCalloutStyle.esriBCSRoundedRectangle;
                //
                bc.Symbol = sfs;
                //
                bc.LeaderTolerance = 10;
                //1

                bc.AnchorPoint = p;
            }

            return bc;
        }

        public ITextElement createTextElement(double x, double y, string text)
        {
            IBalloonCallout bc = createBalloonCallout(x, y);
           
            IRgbColor rgb = new RgbColorClass();
            {
                //rgb.Red = 255;
                rgb.Green = 255;
            }
            ITextSymbol ts = new TextSymbolClass();
            {
                ts.Color = rgb;
            }

            IFormattedTextSymbol fts = ts as IFormattedTextSymbol;
            {
                fts.Background = bc as ITextBackground;
            }
            //fts.Size = 8;
            ts.Size = 8;

            IPoint point = new PointClass();
            {
                double width = axMapControl1.Extent.Width / 13;
                double height = axMapControl1.Extent.Height / 20;
                point.PutCoords(x + width, y + height);
            }

            ITextElement te = new TextElementClass();
            //IMarkerElement me = new MarkerElementClass();
            {
                te.Symbol = ts;
                //ts.Text = text;
                te.Text = text;
            }

            IElement e = te as IElement;
            {
                e.Geometry = point;
            }
            return te;

        }
    }

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