ARCGIS
///
/// 将Map上指定范围（该范围为规则区域）内的内容输出到Image,注意，当图片的行数或列数超过10000左右时，出现原因示知的失败
///
/// 需转出的MAP
/// 输出的图片大小
/// 指定的输出范围（为Envelope类型）///
//赋值
tagRECT rect = new tagRECT();
rect.left = rect.top = 0;
rect.right = outRect.Width;
rect.bottom = outRect.Height;
Try
{
//转换成activeView，若为ILayout，则将Layout转换为IActiveView
IActiveView pActiveView = (IActiveView)pMap;
// 创建图像,为24位色
Image image = new Bitmap(outRect.Width, outRect.Height); //, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
// 填充背景色(白色)
g.FillRectangle(Brushes.White, 0, 0, outRect.Width, outRect.Height);
int dpi = (int)(outRect.Width / pEnvelope.Width);
pActiveView.Output(g.GetHdc().ToInt32(), dpi, ref rect, pEnvelope, null);
g.ReleaseHdc();
return image;
}
catch (Exception excp)
{
MessageBox.Show(excp.Message + "将当前地图转出出错，原因未知", "出错提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
return null;
}
}
通过IExport接口实现的导出，也需要通过IActiveView的OutPut来实现，但其转出句柄为IExport的StartExporting函数返回的DC,具体示例代码如下：
//输出当前地图至指定的文件
public void ExportMapExtent(IActiveView pView, Size outRect,string outPath)
{
Try
{
//参数检查
if pView == null )
{
throw new Exception("输入参数错误,无法生成图片文件!");
}
//根据给定的文件扩展名，来决定生成不同类型的对象
ESRI.ArcGIS.Output.IExport export = null;
if (outPath.EndsWith(".jpg"))
{
export = new ESRI.ArcGIS.Output.ExportJPEGClass();
}
else if (outPath.EndsWith(".tiff"))
{
export = new ESRI.ArcGIS.Output.ExportTIFFClass();
}
else if (outPath.EndsWith(".bmp"))
{
export = new ESRI.ArcGIS.Output.ExportBMPClass();
}
else if (outPath.EndsWith(".emf"))
{
export = new ESRI.ArcGIS.Output.ExportEMFClass();
}
else if (outPath.EndsWith(".png"))
{
export = new ESRI.ArcGIS.Output.ExportPNGClass();
}
else if (outPath.EndsWith(".gif"))
{
export = new ESRI.ArcGIS.Output.ExportGIFClass();
}
export.ExportFileName = outPath;
IEnvelope pEnvelope = pView.Extent;
//导出参数
export.Resolution = 300;
tagRECT exportRect = new tagRECT();
exportRect.left = exportRect.top = 0;
exportRect.right = outRect.Width;
exportRect.bottom = (int)(exportRect.right * pEnvelope.Height / pEnvelope.Width);
ESRI.ArcGIS.Geometry.IEnvelope envelope = new ESRI.ArcGIS.Geometry.EnvelopeClass();
//输出范围
envelope.PutCoords(exportRect.left, exportRect.top, exportRect.right, exportRect.bottom);
export.PixelBounds = envelope;
//可用于取消操作
ITrackCancel pCancel = new CancelTrackerClass();
export.TrackCancel = pCancel;
pCancel.Reset();
//点击ESC键时，中止转出
pCancel.CancelOnKeyPress = true;
pCancel.CancelOnClick = false;
pCancel.ProcessMessages = true;
//获取handle
System.Int32 hDC = export.StartExporting();
pView.Output(hDC, (System.Int16)export.Resolution, ref exportRect, pEnvelope, pCancel);
bool bContinue = pCancel.Continue();
//捕获是否继续
if (bContinue)
{
export.FinishExporting();
export.Cleanup();
}
else
{
export.Cleanup();
}
bContinue = pCancel.Continue();
}
catch (Exception excep)
{
//错误信息提示
}
}
（2）添加使用地图整饰对象（图例、指北针、比例尺）
新建工具用于在PagelayoutControl上添加地图整饰对象
修改工具按钮点击相应函数
public override void OnClick()
{
// TODO: Add AddMapSurround.OnClick implementation
//get the MapControl from the hook in case the container is a ToolbarControl
if (m_hookHelper.Hook is IToolbarControl)
{
pagelayoutControl = (IPageLayoutControl3)((IToolbarControl)m_hookHelper.Hook).Buddy;
}
//In case the container is MapControl
else if (m_hookHelper.Hook is IPageLayoutControl3)
{
pagelayoutControl = (IPageLayoutControl3)m_hookHelper.Hook;
}
else
{
MessageBox.Show("Active control must be MapControl!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return;
}
}
添加创建地图整饰对象成员函数
private IMapSurround CreateMapSurround(UID ipUID, IEnvelope ipEnv, string sName, IPageLayoutControl3 ipLayoutCtrl, IMapSurround ipStyle)
{
IMapSurround ms = null;
IMapFrame mf = ipLayoutCtrl.ActiveView.GraphicsContainer.FindFrame(
ipLayoutCtrl.ActiveView.FocusMap) as IMapFrame;
IMapSurroundFrame msf = mf.CreateSurroundFrame(ipUID, ipStyle);
IElement ele = msf as IElement;
ele.Geometry = ipEnv;
ms = msf.MapSurround;
https://www.360docs.net/doc/d52430137.html, = sName;
ipLayoutCtrl.ActiveView.GraphicsContainer.AddElement(ele, 0);
ipLayoutCtrl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
return ms;
}
在鼠标按下事件中添加图例
public override void OnMouseDown(int Button, int Shift, int X, int Y)
{
// TODO: Add AddMapSurround.OnMouseDown implementation
IRubberBand ipRubber = new RubberEnvelopeClass();
IEnvelope env = ipRubber.TrackNew(pagelayoutControl.ActiveView.ScreenDisplay,
null) as IEnvelope;
//初始化图例信息
UID uid = new UIDClass();
uid.Value = "esriCarto.Legend";
CreateMapSurround(uid,env,"我的图例",pagelayoutControl,null);
}
添加指北针
public override void OnMouseDown(int Button, int Shift, int X, int Y)
{
// TODO: Add AddMapSurround.OnMouseDown implementation
IRubberBand ipRubber = new RubberEnvelopeClass();
IEnvelope env = ipRubber.TrackNew(pagelayoutControl.ActiveView.ScreenDisplay,
null) as IEnvelope;
//初始化图例信息
UID uid = new UIDClass();
uid.Value = "esriCarto.MarkerNorthArrow";
CreateMapSurround(uid,env,"我的指北针",pagelayoutControl,null);
}
添加比例尺条
public override void OnMouseDown(int Button, int Shift, int X, int Y)
{
// TODO: Add AddMapSurround.OnMouseDown implementation
IRubberBand ipRubber = new RubberEnvelopeClass();
IEnvelope env = ipRubber.TrackNew(pagelayoutControl.ActiveView.ScreenDisplay,
null) as IEnvelope;
//初始化图例信息
UID uid = new UIDClass();
uid.Value = "esriCarto.ScaleLine";
CreateMapSurround(uid,env,"我的比例尺",pagelayoutControl,null);
}
添加比例尺文本
public override void OnMouseDown(int Button, int Shift, int X, int Y)
{
// TODO: Add AddMapSurround.OnMouseDown implementation
IRubberBand ipRubber = new RubberEnvelopeClass();
IEnvelope env = ipRubber.TrackNew(pagelayoutControl.ActiveView.ScreenDisplay,
null) as IEnvelope;
//初始化图例信息
UID uid = new UIDClass();
uid.Value = "esriCarto.ScaleText";
CreateMapSurround(uid,env,"我的比例尺",pagelayoutControl,null);
}
在主窗口中添加菜单，使用该工具
private void mapSurroundToolStripMenuItem_Click(object sender, EventArgs e)
{
ICommand command = new AddMapSurround();
command.OnCreate(m_pagelayoutControl.Object);
command.OnClick();
axPageLayoutControl1.CurrentTool = command as ITool;
}