C# EnvelopeClass.CenterAt方法代码示例

 private void ccc(IPoint p)
 {
     IEnvelope pEnvelope = new EnvelopeClass();
     pEnvelope.SetEmpty();
     pEnvelope = pAxMapControl.Extent;
     pEnvelope.CenterAt(p);
     pAxMapControl.Extent = pEnvelope.Envelope;
     pAxMapControl.Refresh();
 }

        internal void AddPPGeocodedPoint(double lat, double lng)
        {
            // Set the coordinate system of the data frame.
            ArcMap.Document.ActiveView.FocusMap.SpatialReference = DefineGCS(); 
            ArcMap.Document.ActiveView.Refresh();

            IPoint iPoint = new PointClass();
            // Set the coordinate system of your point to match your data frame
            iPoint.SpatialReference = DefineGCS();
            iPoint.X = lng;
            iPoint.Y = lat;

            IMap map = ArcMap.Document.ActiveView as IMap;
            IGraphicsContainer graphicsContainer = (IGraphicsContainer)map; // Explicit Cast
            IElement element = null;

            // set the point color
            IColor pointColor = new RgbColor();
            //pointColor.RGB = 255255255;
            pointColor.RGB = 255000000;

            // Marker symbols
            ESRI.ArcGIS.Display.ISimpleMarkerSymbol simpleMarkerSymbol = new SimpleMarkerSymbolClass();
            simpleMarkerSymbol.Color = pointColor;
            simpleMarkerSymbol.Outline = true;
            simpleMarkerSymbol.OutlineColor = pointColor;
            simpleMarkerSymbol.Size = 10;
            simpleMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSCircle;

            // Marker element
            IMarkerElement markerElement = new MarkerElementClass();
            markerElement.Symbol = simpleMarkerSymbol;
            markerElement.Symbol.Color = pointColor;

            element = (IElement)markerElement; // Explicit Cast

            // set the element name
            IElementProperties3 elemProperties = element as IElementProperties3;
            elemProperties.Name = string.Concat(lng, " ,", lat);
            elemProperties.AnchorPoint = esriAnchorPointEnum.esriCenterPoint;

            // Add the element to a graphics container and refresh the ActiveView
            if (!(element == null))
            {
                element.Geometry = iPoint;
                graphicsContainer.AddElement(element, 0);
                IEnvelope envelope = new EnvelopeClass();
                envelope = ArcMap.Document.ActiveView.Extent;
                envelope.CenterAt(iPoint);
                //ArcMap.Document.ActiveView.Extent = envelope;
                //map.MapScale = 2400;
                map.MapScale = 5000;
                ArcMap.Document.ActiveView.Refresh();
            }
        }

        private void toolStripButton1_Click(object sender, EventArgs e)
        {
            IEnvelope pEnvelope = new EnvelopeClass();
            IPoint pPoint = new PointClass();
            pPoint.PutCoords(Convert.ToDouble(txtlong.Text), Convert.ToDouble(txtlat.Text));

            pEnvelope = pAxMapControl.Extent;
            pEnvelope.CenterAt(pPoint);
            pAxMapControl.Extent = pEnvelope.Envelope;
            pAxMapControl.FlashShape(pPoint as IGeometry);
            //ccc(pPoint);
            //ddd(pPoint);
        }

		public override void OnMouseDown(int Button, int Shift, int X, int Y)
        {
            IMap map;
            IPoint clickedPoint = m_hookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);

            //If ActiveView is a PageLayout 
            if (m_hookHelper.ActiveView is IPageLayout)
            {
                //See whether the mouse has been clicked over a Map in the PageLayout 
                map = m_hookHelper.ActiveView.HitTestMap(clickedPoint);

                //If mouse click isn't over a Map exit 
                if (map == null)
                    return; 


                //Ensure the Map is the FocusMap 
                if ((!object.ReferenceEquals(map, m_hookHelper.FocusMap)))
                {
                    m_hookHelper.ActiveView.FocusMap = map;
                    m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
                }

                //Still need to convert the clickedPoint into map units using the map's IActiveView 
                clickedPoint = ((IActiveView)map).ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);
            }

            else //Or ActiveView is a Map 
            {
                map = m_hookHelper.FocusMap;
            }

            IActiveView activeView = (IActiveView)map;
            IRubberBand rubberEnv = new RubberEnvelopeClass();
            IGeometry geom = rubberEnv.TrackNew(activeView.ScreenDisplay, null);
            IArea area = (IArea)geom;

            //Extra logic to cater for the situation where the user simply clicks a point on the map 
            //or where envelope is so small area is zero 
            if ((geom.IsEmpty == true) || (area.Area == 0))
            {

                //create a new envelope 
                IEnvelope tempEnv = new EnvelopeClass();

                //create a small rectangle 
                ESRI.ArcGIS.esriSystem.tagRECT RECT = new tagRECT();
                RECT.bottom = 0;
                RECT.left = 0;
                RECT.right = 5;
                RECT.top = 5;

                //transform rectangle into map units and apply to the tempEnv envelope 
                IDisplayTransformation dispTrans = activeView.ScreenDisplay.DisplayTransformation;
                dispTrans.TransformRect(tempEnv,ref RECT, 4); //4 = esriDisplayTransformationEnum.esriTransformToMap)
                tempEnv.CenterAt(clickedPoint);
                geom = (IGeometry)tempEnv;
            }

            //Set the spatial reference of the search geometry to that of the Map 
            ISpatialReference spatialReference = map.SpatialReference;
            geom.SpatialReference = spatialReference;

            map.SelectByShape(geom, null, false);
            activeView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, activeView.Extent);
        } 

        //定位
        private void button1_Click(object sender, EventArgs e)
        {
            IEnvelope pEnvelope = new EnvelopeClass();
            IPoint pPoint = new PointClass();
            //调用GetProject2方法经纬度转换成米
            pPoint = GetProject2(Convert.ToDouble(textBox1.Text), Convert.ToDouble(textBox2.Text));
            //axMapControl.MapUnits = esriUnits.esriDecimalDegrees;
            //axMapControl.MapUnits = esriUnits.esriMeters; //米
               // esriUnits mapUnits = axMapControl.MapUnits;
            //axMapControl.MapUnits = esriUnits.esriDecimalDegrees;
            //pPoint.PutCoords(Convert.ToDouble(textBox1.Text), Convert.ToDouble(textBox2.Text));//该句中的txtlong，txtlat是输入经纬值的TextBox
            //pPoint.X = Convert.ToDouble(textBox1.Text);
            //pPoint.Y = Convert.ToDouble(textBox2.Text);
            pEnvelope = axMapControl.Extent;
            pEnvelope.CenterAt(pPoint);
            axMapControl.Extent = pEnvelope.Envelope;//前一段代码实现平移
            axMapControl.ActiveView.ScreenDisplay.UpdateWindow();

            axMapControl.FlashShape(pPoint as IGeometry);//此句实现闪烁（效果没有ArcMap中好， ）
            //axMapControl.ActiveView.Extent = pEnvelope;
            //showAnnotationByScale();
        }

 public static IEnvelope GetEnvlope(IActiveView activeView, IPoint queryPoint, double envlopeDistance)
 {
     IEnvelope envelope = new EnvelopeClass();
     envelope.CenterAt(queryPoint);
     envelope.Width = 2 * envlopeDistance;
     envelope.Height = 2 * envlopeDistance;
     return envelope;           
 }

        //定位
        private void button1_Click(object sender, EventArgs e)
        {
            //ESRI.ArcGIS.esriSystem.IUnitConverter unitConverter = (ESRI.ArcGIS.esriSystem.IUnitConverter)ServerContext.CreateObject("esriSystem.UnitConverter");

            //project raster
            //IUnitConverter iu = new esriUnits();

            IUnitConverter unitConverter = new UnitConverterClass();
            double dFittedBoundsWidthInches = unitConverter.ConvertUnits(-100, esriUnits.esriDecimalDegrees, esriUnits.esriMeters)/100;
            double dFittedBoundsWidthInchesy = unitConverter.ConvertUnits(40, esriUnits.esriDecimalDegrees, esriUnits.esriMeters)/100;
            //ui.ConvertUnits(10, esriUnits.esriMeters, esriUnits.esriMeters);
            //IPoint pPoint = new PointClass();
            //pPoint.X = -1000;
            //pPoint.Y = -1000;

            //IGeometry pGeometry;
            //pGeometry = (IGeometry)pPoint;

            //IMarkerSymbol pMarkerSymbol = new SimpleMarkerSymbolClass();

            //axMapControl.FlashShape(pGeometry, 4, 100, pMarkerSymbol);

            IEnvelope pEnvelope = new EnvelopeClass();
            IPoint pPoint = new PointClass();

            //axMapControl.MapUnits = esriUnits.esriDecimalDegrees;
            //axMapControl.MapUnits = esriUnits.esriMeters; //米

               // esriUnits mapUnits = axMapControl.MapUnits;

            //axMapControl.MapUnits = esriUnits.esriDecimalDegrees;
            //pPoint.PutCoords(Convert.ToDouble(textBox1.Text), Convert.ToDouble(textBox2.Text));//该句中的txtlong，txtlat是输入经纬值的TextBox
            pPoint.X = Convert.ToDouble(textBox1.Text);
            pPoint.Y = Convert.ToDouble(textBox2.Text);
            pEnvelope = axMapControl.Extent;
            pEnvelope.CenterAt(pPoint);

            axMapControl.Extent = pEnvelope.Envelope;//前一段代码实现平移
            axMapControl.ActiveView.ScreenDisplay.UpdateWindow();
            axMapControl.FlashShape(pPoint as IGeometry);//此句实现闪烁（效果没有ArcMap中好， ）
            //axMapControl.ActiveView.Extent = pEnvelope;
            //showAnnotationByScale();
        }

 private void toolStripButton2_Click(object sender, EventArgs e)
 {
     IPoint pPoint = new PointClass();
     pPoint.PutCoords(Convert.ToDouble(txtlong.Text), Convert.ToDouble(txtlat.Text));
     IEnvelope pEnvelope = new EnvelopeClass();
     pEnvelope = pAxMapControl.Extent;
     //pEnvelope.Expand(10, -10, true);
     pEnvelope.Width = 20;
     pEnvelope.Height = 15;
     pEnvelope.CenterAt(pPoint);
     pAxMapControl.Extent = pEnvelope.Envelope;
     pAxMapControl.FlashShape(pPoint as IGeometry);
 }

        private IEnvelope ConstructViewEnvAtPoint(IPoint pt, double size)
        {
            IEnvelope theEnv = new EnvelopeClass();
            pt.Project(this.BCAlbersSpatialReference);
            theEnv.LowerLeft = pt;
            theEnv.Width = size;
            theEnv.Height = size;
            theEnv.Project(this.BCAlbersSpatialReference);
            theEnv.CenterAt(pt);

            return theEnv;
        }