基于ArcGIS Engine地图操作的基本功能实现（基于代码）

1）移动地图代码 axMapControl1.Pan(); 2）拉框放大地图代码 axMapControl1.Extent = axMapControl1.TrackRectangle(); 3）拉框缩小地图代码 double newMapExtentWidth; double newMapExtentHeight; double newMapExtentXmin; double newMapExtentYmin; double newMapExtentXmax; double newMapExtentYmax; double zoomInWidthFactor; double zoomInHeightFactor; IEnvelope pDrawRectangle; IEnvelope pNewEnvelope; IEnvelope pCurrentExtent; pDrawRectangle = axMapControl1.TrackRectangle(); pNewEnvelope = new EnvelopeClass(); pCurrentExtent = axMapControl1.Extent; if (pDrawRectangle.IsEmpty ==false) { if ((pDrawRectangle.Width != 0) &&(pDrawRectangle.Height!=0)) { zoomInWidthFactor = pCurrentExtent.Width / pDrawRectangle.Width; zoomInHeightFactor = pCurrentExtent.Height / pDrawRectangle.Height; newMapExtentWidth = pCurrentExtent.Width * zoomInWidthFactor; newMapExtentHeight = pCurrentExtent.Height * zoomInHeightFactor; newMapExtentXmin = pCurrentExtent.XMin - (pDrawRectangle.XMin - pCurrentExtent.XMin) * zoomInWidthFactor; newMapExtentYmin = pCurrentExtent.YMin - (pDrawRectangle.YMin - pCurrentExtent.YMin) *zoomInHeightFactor; newMapExtentXmax = newMapExtentXmin + newMapExtentWidth; newMapExtentYmax = newMapExtentYmin + newMapExtentHeight; pNewEnvelope.PutCoords(newMapExtentXmin, newMapExtentYmin, newMapExtentXmax, newMapExtentYmax); } } axMapControl1.Extent = pNewEnvelope; 4）中心放大地图代码 IEnvelope pEnvelope; pEnvelope = axMapControl1.Extent; pEnvelope.Expand(0.5, 0.5, true); axMapControl1.Extent = pEnvelope; 5）中心缩小地图代码 IEnvelope pEnvelope; pEnvelope = axMapControl1.Extent; pEnvelope.Expand(2, 2, true); axMapControl1.Extent = pEnvelope; 6）全图显示 axMapControl1.Extent = axMapControl1.FullExtent; 7）历史视图切换代码 ①前一视图代码 if(axMapControl1.ActiveView.ExtentStack.CanUndo()) { axMapControl1.ActiveView.ExtentStack.Undo(); } ②后一视图代码 if(axMapControl1.ActiveView.ExtentStack.CanRedo()) { axMapControl1.ActiveView.ExtentStack.Redo(); }

移动地图和放大缩小会遇到从按钮开始的情况采用以下的办法解决

int x = 0; private void fun() { if (x == 3) { axMapControl1.Extent = axMapControl1.TrackRectangle(); } if (x == 2) { axMapControl1.Pan(); } if (x == 5) { double newMapExtentWidth; double newMapExtentHeight; double newMapExtentXmin; double newMapExtentYmin; double newMapExtentXmax; double newMapExtentYmax; double zoomInWidthFactor; double zoomInHeightFactor; IEnvelope pDrawRectangle; IEnvelope pNewEnvelope; IEnvelope pCurrentExtent; pDrawRectangle = axMapControl1.TrackRectangle(); pNewEnvelope = new EnvelopeClass(); pCurrentExtent = axMapControl1.Extent; if (pDrawRectangle.IsEmpty == false) { if ((pDrawRectangle.Width != 0) && (pDrawRectangle.Height != 0)) { zoomInWidthFactor = pCurrentExtent.Width / pDrawRectangle.Width; zoomInHeightFactor = pCurrentExtent.Height / pDrawRectangle.Height; newMapExtentWidth = pCurrentExtent.Width * zoomInWidthFactor; newMapExtentHeight = pCurrentExtent.Height * zoomInHeightFactor; newMapExtentXmin = pCurrentExtent.XMin - (pDrawRectangle.XMin - pCurrentExtent.XMin) * zoomInWidthFactor; newMapExtentYmin = pCurrentExtent.YMin - (pDrawRectangle.YMin - pCurrentExtent.YMin) * zoomInHeightFactor; newMapExtentXmax = newMapExtentXmin + newMapExtentWidth; newMapExtentYmax = newMapExtentYmin + newMapExtentHeight; pNewEnvelope.PutCoords(newMapExtentXmin, newMapExtentYmin, newMapExtentXmax, newMapExtentYmax); } } axMapControl1.Extent = pNewEnvelope; } } private void button2_Click(object sender, EventArgs e) { x = 3; } private void button3_Click(object sender, EventArgs e) { x = 5;