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

{

}

}