AE+C#实现缩放坐标比例尺长度面积量测输出图片等功能

 

代码如下：

#region "工具条按钮"
        //拉框放大
        private void toolStripButton_Zoomin_Click(object sender, EventArgs e)
        {
            currentoperation = "拉框放大";
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerZoomIn;
        }
        //拉框缩小
        private void toolStripButton_Zoomout_Click(object sender, EventArgs e)
        {
            currentoperation = "拉框缩小";
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerZoomOut;
        }
        //平移
        private void toolStripButton_Pan_Click(object sender, EventArgs e)
        {
            currentoperation = "平移漫游";
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerPan;
        }
        //全图
        private void toolStripButton_FullExtent_Click(object sender, EventArgs e)
        {
            currentoperation = "全图显示";
            axMapControl1.Extent = axMapControl1.FullExtent;
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
        }
        //上一视图
        private void toolStripButton_LastExtent_Click(object sender, EventArgs e)
        {
            currentoperation = "上一视图";
            IExtentStack pExtentStack = null;
            pExtentStack = axMapControl1.ActiveView.ExtentStack;
            if (pExtentStack.CanUndo())
                pExtentStack.Undo();
            axMapControl1.Refresh();
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
        }
        //下一视图
        private void toolStripButton_NextExtent_Click(object sender, EventArgs e)
        {
            currentoperation = "下一视图";
            IExtentStack pExtentStack = null;
            pExtentStack = axMapControl1.ActiveView.ExtentStack;
            if (pExtentStack.CanRedo())
                pExtentStack.Redo();
            axMapControl1.Refresh();
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
        }
        //中心放大
        private void toolStripButton_Zoomin1_Click(object sender, EventArgs e)
        {
            currentoperation = "中心放大";
            IEnvelope objEnvelope = null;
            objEnvelope = axMapControl1.Extent;
            objEnvelope.Expand(0.5, 0.5, true);
            axMapControl1.Extent = objEnvelope;
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
        }
        //中心缩小
        private void toolStripButton_Zoomout1_Click(object sender, EventArgs e)
        {
            currentoperation = "中心缩小";
            IEnvelope objEnvelope = null;
            objEnvelope = axMapControl1.Extent;
            objEnvelope.Expand(2, 2, true);
            axMapControl1.Extent = objEnvelope;
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
        }
        //刷新
        private void toolStripButton_Refresh_Click(object sender, EventArgs e)
        {
            currentoperation = "刷新";
            axMapControl1.Refresh();
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
        }

        //长度量测
        private void toolStripButton_LengthMeasure_Click(object sender, EventArgs e)
        {
            currentoperation = "长度量测";
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
        }
        //面积量测
        private void toolStripButton_AreaMeasure_Click(object sender, EventArgs e)
        {
            currentoperation = "面积量测";
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
        }
        //地图输出
        private void toolStripButton_OutputMap_Click(object sender, EventArgs e)
        {
            currentoperation = "地图输出";
            OutputMap();
        }

        #endregion

        //=========================================================================================================
        #region"axMapControl事件"
        //鼠标按下事件
        private void axMapControl1_OnMouseDown(object sender, AxESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e)
        {
            IEnvelope objEnvelope = null;
            IPoint pPoint = null;
            double  x;
            x = (6371110 * 2 * Math.PI) / 360;      
            IActiveView pActiveView = axMapControl1.ActiveView.FocusMap as IActiveView;
            pPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x, e.y);
            switch (currentoperation)
            {
                case "拉框放大":
                    objEnvelope = axMapControl1.TrackRectangle();
                    if (!objEnvelope.IsEmpty)
                    {
                        axMapControl1.Extent = objEnvelope;
                    }
                    else
                    {
                        //点击放大
                        pPoint.X = e.mapX;
                        pPoint.Y = e.mapY;
                        pPoint.Z = 0;
                        objEnvelope = axMapControl1.Extent;
                        objEnvelope.CenterAt(pPoint);
                        objEnvelope.Expand(0.5, 0.5, true);
                        axMapControl1.Extent = objEnvelope;
                    }
                    break;
                case "拉框缩小":
                    objEnvelope = axMapControl1.TrackRectangle();
                    IEnvelope currentExtent = this.axMapControl1.Extent;
                    double dXmin = 0, dYmin = 0, dXmax = 0, dYmax = 0, dHeight = 0, dWidth = 0;
                    if (!objEnvelope.IsEmpty)
                    {
                        dWidth = currentExtent.Width * (currentExtent.Width / objEnvelope.Width);
                        dHeight = currentExtent.Height * (currentExtent.Height / objEnvelope.Height);

                        dXmin = currentExtent.XMin - ((objEnvelope.XMin - currentExtent.XMin) * (currentExtent.Width / objEnvelope.Width));
                        dYmin = currentExtent.YMin - ((objEnvelope.YMin - currentExtent.YMin) * (currentExtent.Height / objEnvelope.Height));
                        dXmax = dXmin + dWidth;
                        dYmax = dYmin + dHeight;
                        objEnvelope.PutCoords(dXmin, dYmin, dXmax, dYmax);
                        this.axMapControl1.Extent = objEnvelope;
                    }
                    else
                    {
                        //点击缩小
                        pPoint.X = e.mapX;
                        pPoint.Y = e.mapY;
                        pPoint.Z = 0;
                        objEnvelope = axMapControl1.Extent;
                        objEnvelope.CenterAt(pPoint);
                        objEnvelope.Expand(2, 2, true);
                        axMapControl1.Extent = objEnvelope;
                    }
                    break;
                case "平移漫游":
                    axMapControl1.Pan();
                    break;
                case "长度量测":
                    IPolyline pPolyline = null;
                    pPolyline = (IPolyline)axMapControl1.TrackLine();
                    double l ;
                    l =Math.Abs( Math.Round(pPolyline.Length  * x,2));
                    MessageBox.Show("您量测的距离为" + l.ToString() + "米。", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    break;
                case "面积量测":
                    IPolygon pPolygon = null;
                    pPolygon =(IPolygon)axMapControl1.TrackPolygon();
                    IArea pArea =(IArea)pPolygon;
                    double s;
                    s = Math.Abs(Math.Round(pArea.Area * x * x, 2));                    
                    MessageBox.Show("您量测的距离为" + s.ToString() + "平方米。", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    break;
            }
                

        }

        //鼠标移动事件,获取坐标值
        private void axMapControl1_OnMouseMove(object sender, AxESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseMoveEvent e)
        {
            //double X = 0;
            //double Y = 0;
            //X = Math.Round(e.mapX, 6);    //保留6位小数
            //Y = Math.Round(e.mapY, 6);
            toolStripStatusLabel_X.Text = "X=" + e.mapX.ToString() + "     ";
            toolStripStatusLabel_Y.Text = "Y=" + e.mapY.ToString();
        }

        //获取当前比例尺
        private void axMapControl1_OnViewRefreshed(object sender, AxESRI.ArcGIS.Controls.IMapControlEvents2_OnViewRefreshedEvent e)
        {
            double S= Math.Round(axMapControl1.MapScale, 0);   //保留0位小数
            toolStripStatusLabel_Scale.Text = "比列尺: 1:" + S.ToString() + "          ";
        }

        #endregion

 

        #region"私有函数"
        private void OutputMap()
        {
            try
            {
                SaveFileDialog sfd = new SaveFileDialog();
                sfd.Filter = "(*jpg)|*jpg|(*.tif)|*tif|(*.pdf)|*.pdf|(*.bmp)|*.bmp";
                sfd.Title = "图片另存为";
                if (sfd.ShowDialog() == DialogResult.OK)
                {
                    IExport pExport = null;
                    if (1 == sfd.FilterIndex)
                    {
                        pExport = new ExportJPEGClass();
                        pExport.ExportFileName = sfd.FileName + ".jpeg";
                    }
                    else if (2 == sfd.FilterIndex)
                    {
                        pExport = new ExportTIFFClass();
                        pExport.ExportFileName = sfd.FileName + ".tif";
                    }
                    else if (3 == sfd.FilterIndex)
                    {
                        pExport = new ExportPDFClass();
                        pExport.ExportFileName = sfd.FileName + ".pdf";
                    }
                    else if (4 == sfd.FilterIndex)
                    {
                        pExport = new ExportBMPClass();
                        pExport.ExportFileName = sfd.FileName + ".bmp";
                    }

                    //pExport.ExportFileName = sfd.FileName;
                    int res = 96;
                    pExport.Resolution = res;
                    tagRECT exportRECT = axMapControl1.ActiveView.ExportFrame;
                    IEnvelope pENV = new EnvelopeClass();
                    pENV.PutCoords(exportRECT.left, exportRECT.top, exportRECT.right, exportRECT.bottom);
                    pExport.PixelBounds = pENV;
                    int Hdc = pExport.StartExporting();
                    IEnvelope pVisibleBounds = null;
                    ESRI.ArcGIS.esriSystem.ITrackCancel pTrack = null;
                    axMapControl1.ActiveView.Output(Hdc, (int)pExport.Resolution, ref exportRECT, pVisibleBounds, pTrack);
                    Application.DoEvents();
                    pExport.FinishExporting();
                    pExport.Cleanup();
                }
                MessageBox.Show("地图输出成功！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch
            {
            }
        }

 

转自：http://blog.sina.com.cn/s/blog_5d6893390100h4a6.html