实现了地图导出为图片功能，代码很杂。
using System;
using System.Drawing;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.ADF.CATIDs;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Output;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.Display;
using System.Windows.Forms;
public partial class Form1 : Form
{
[DllImport("GDI32.dll")]
public static extern int GetDeviceCaps(int hdc, int nIndex);
[DllImport("User32.dll")]
public static extern int GetDC(int hWnd);
[DllImport("User32.dll")]
public static extern int ReleaseDC(int hWnd, int hDC);
//[DllImport("user32.dll", SetLastError = true)]
//static extern bool SystemParametersInfo(uint uiAction, uint uiParam, IntPtr pvParam, uint fWinIni);
[DllImport("user32.dll", SetLastError = true)]
static extern bool SystemParametersInfo(uint uiAction, uint uiParam, ref int pvParam, uint fWinIni);
const uint SPI_GETFONTSMOOTHING = 74;
const uint SPI_SETFONTSMOOTHING = 75;
const uint SPIF_UPDATEINIFILE = 0x1;
public Form1()
{
InitializeComponent();
}
private void btnExport_Click(object sender, EventArgs e)
{
mapExportDialog.Filter = "JPEG格式(*.jpg)|*.jpg|EPS格式(*.eps)|*.eps|EMF格式(*.emf)|*.emf|BMP格式(*.bmp)|*.bmp|PDF格式(*.pdf)|*.pdf|TIFF格式(*.tif)|*.tif|PNG格式(*.png)|*.png|SVG格式(*.svg)|*.svg|AI格式(*.ai)|*.ai|所有格式(*.*)|*.*";
mapExportDialog.RestoreDirectory = true;
if (mapExportDialog.ShowDialog() == DialogResult.OK)
{
string strLocalFileName = mapExportDialog.FileName.ToString();
//获取文件路径，不带文件名
string strFilePath = strLocalFileName.Substring(0, strLocalFileName.LastIndexOf("//")+2);
string strFileName = strLocalFileName.Substring(strLocalFileName.LastIndexOf("//") + 1, strLocalFileName.LastIndexOf(".")-3);
// MessageBox.Show(strFilePath);
// MessageBox.Show(strFileName);
string picType;
switch (mapExportDialog.FilterIndex)
{
case 1:
picType = "JPEG";
break;
case 2:
picType = "EPS";
break;
case 3:
picType = "EMF";
break;
case 4:
picType = "BMP";
break;
case 5:
picType = "PDF";
break;
case 6:
picType = "TIFF";
break;
case 7:
picType = "PNG";
break;
case 8:
picType = "SVG";
break;
case 9:
picType = "AI";
break;
default:
picType = "EMF";
break;
}
// MessageBox.Show(picType);
ExportActiveViewParameterized(96, 1, picType, strFilePath, strFileName,false, mapMain);
}
}
private void ExportActiveViewParameterized(long iOutputResolution, long lResampleRatio, string ExportType, string sOutputDir, string sNameRoot,Boolean bClipToGraphicsExtent, AxMapControl pMap)
{
//解决文件名错误
sNameRoot = sNameRoot.Substring(1, sNameRoot.Length-1);
IActiveView docActiveView = pMap.ActiveView;
IExport docExport;
long iPrevOutputImageQuality;
IOutputRasterSettings docOutputRasterSettings;
IEnvelope PixelBoundsEnv;
tagRECT exportRECT;
tagRECT DisplayBounds;
IDisplayTransformation docDisplayTransformation;
IPageLayout docPageLayout;
IEnvelope docMapExtEnv;
long hdc;
long tmpDC;
//string sNameRoot;
long iScreenResolution;
bool bReenable = false;
IEnvelope docGraphicsExtentEnv;
IUnitConverter pUnitConvertor;
if (GetFontSmoothing())
{
bReenable = true;
DisableFontSmoothing();
if (GetFontSmoothing())
{
//font smoothing is NOT successfully disabled, error out.
return;
}
//else font smoothing was successfully disabled.
}
// The Export*Class() type initializes a new export class of the desired type.
if (ExportType == "PDF")
{
docExport = new ExportPDFClass();
}
else if (ExportType == "EPS")
{
docExport = new ExportPSClass();
}
else if (ExportType == "AI")
{
docExport = new ExportAIClass();
}
else if (ExportType == "BMP")
{
docExport = new ExportBMPClass();
}
else if (ExportType == "TIFF")
{
docExport = new ExportTIFFClass();
}
else if (ExportType == "SVG")
{
docExport = new ExportSVGClass();
}
else if (ExportType == "PNG")
{
docExport = new ExportPNGClass();
}
else if (ExportType == "GIF")
{
docExport = new ExportGIFClass();
}
else if (ExportType == "EMF")
{
docExport = new ExportEMFClass();
}
else if (ExportType == "JPEG")
{
docExport = new ExportJPEGClass();
}
else
{
MessageBox.Show("！！不支持的格式 " + ExportType + ", 默认导出 EMF.");
ExportType = "EMF";
docExport = new ExportEMFClass();
}
// save the previous output image quality, so that when the export is complete it will be set back.
docOutputRasterSettings = docActiveView.ScreenDisplay.DisplayTransformation as IOutputRasterSettings;
iPrevOutputImageQuality = docOutputRasterSettings.ResampleRatio;
if (docExport is IExportImage)
{
// always set the output quality of the DISPLAY to 1 for image export formats
SetOutputQuality(docActiveView, 1);
}
else
{
// for vector formats, assign the desired ResampleRatio to control drawing of raster layers at export time
SetOutputQuality(docActiveView, lResampleRatio);
}
//set the name root for the export
// sNameRoot = "ExportActiveViewSampleOutput";
//set the export filename (which is the nameroot + the appropriate file extension)
docExport.ExportFileName = sOutputDir + sNameRoot + "." + docExport.Filter.Split('.')[1].Split('|')[0].Split(')')[0];
tmpDC = GetDC(0);
iScreenResolution = GetDeviceCaps((int)tmpDC, 88); //88 is the win32 const for Logical pixels/inch in X)
ReleaseDC(0, (int)tmpDC);
docExport.Resolution = iOutputResolution;
if (docActiveView is IPageLayout)
{
//get the bounds of the "exportframe" of the active view.
DisplayBounds = docActiveView.ExportFrame;
//set up pGraphicsExtent, used if clipping to graphics extent.
docGraphicsExtentEnv = GetGraphicsExtent(docActiveView);
}
else
{
//Get the bounds of the deviceframe for the screen.
docDisplayTransformation = docActiveView.ScreenDisplay.DisplayTransformation;
DisplayBounds = docDisplayTransformation.get_DeviceFrame();
}
PixelBoundsEnv = new Envelope() as IEnvelope;
if (bClipToGraphicsExtent && (docActiveView is IPageLayout))
{
docGraphicsExtentEnv = GetGraphicsExtent(docActiveView);
docPageLayout = docActiveView as PageLayout;
pUnitConvertor = new UnitConverter();
//assign the x and y values representing the clipped area to the PixelBounds envelope
PixelBoundsEnv.XMin = 0;
PixelBoundsEnv.YMin = 0;
PixelBoundsEnv.XMax = pUnitConvertor.ConvertUnits(docGraphicsExtentEnv.XMax, docPageLayout.Page.Units, esriUnits.esriInches) * docExport.Resolution - pUnitConvertor.ConvertUnits(docGraphicsExtentEnv.XMin, docPageLayout.Page.Units, esriUnits.esriInches) * docExport.Resolution;
PixelBoundsEnv.YMax = pUnitConvertor.ConvertUnits(docGraphicsExtentEnv.YMax, docPageLayout.Page.Units, esriUnits.esriInches) * docExport.Resolution - pUnitConvertor.ConvertUnits(docGraphicsExtentEnv.YMin, docPageLayout.Page.Units, esriUnits.esriInches) * docExport.Resolution;
//'assign the x and y values representing the clipped export extent to the exportRECT
exportRECT.bottom = (int)(PixelBoundsEnv.YMax) + 1;
exportRECT.left = (int)(PixelBoundsEnv.XMin);
exportRECT.top = (int)(PixelBoundsEnv.YMin);
exportRECT.right = (int)(PixelBoundsEnv.XMax) + 1;
//since we're clipping to graphics extent, set the visible bounds.
docMapExtEnv = docGraphicsExtentEnv;
}
else
{
double tempratio = iOutputResolution / iScreenResolution;
double tempbottom = DisplayBounds.bottom * tempratio;
double tempright = DisplayBounds.right * tempratio;
//'The values in the exportRECT tagRECT correspond to the width
//and height to export, measured in pixels with an origin in the top left corner.
exportRECT.bottom = (int)Math.Truncate(tempbottom);
exportRECT.left = 0;
exportRECT.top = 0;
exportRECT.right = (int)Math.Truncate(tempright);
//populate the PixelBounds envelope with the values from exportRECT.
// We need to do this because the exporter object requires an envelope object
// instead of a tagRECT structure.
PixelBoundsEnv.PutCoords(exportRECT.left, exportRECT.top, exportRECT.right, exportRECT.bottom);
//since it's a page layout or an unclipped page layout we don't need docMapExtEnv.
docMapExtEnv = null;
}
// Assign the envelope object to the exporter object's PixelBounds property. The exporter object
// will use these dimensions when allocating memory for the export file.
docExport.PixelBounds = PixelBoundsEnv;
// call the StartExporting method to tell docExport you're ready to start outputting.
hdc = docExport.StartExporting();
// Redraw the active view, rendering it to the exporter object device context instead of the app display.
// We pass the following values:
// * hDC is the device context of the exporter object.
// * exportRECT is the tagRECT structure that describes the dimensions of the view that will be rendered.
// The values in exportRECT should match those held in the exporter object's PixelBounds property.
// * docMapExtEnv is an envelope defining the section of the original image to draw into the export object.
docActiveView.Output((int)hdc, (int)docExport.Resolution, ref exportRECT, docMapExtEnv, null);
//finishexporting, then cleanup.
docExport.FinishExporting();
docExport.Cleanup();
MessageBox.Show("成功导出地图： " + sOutputDir + sNameRoot + "." + docExport.Filter.Split('.')[1].Split('|')[0].Split(')')[0] + ".", "提示");
//set the output quality back to the previous value
SetOutputQuality(docActiveView, iPrevOutputImageQuality);
if (bReenable)
{
EnableFontSmoothing();
bReenable = false;
if (!GetFontSmoothing())
{
//error: cannot reenable font smoothing.
MessageBox.Show("Unable to reenable Font Smoothing", "Font Smoothing error");
}
}
docMapExtEnv = null;
PixelBoundsEnv = null;
}
private void SetOutputQuality(IActiveView docActiveView, long iResampleRatio)
{
IGraphicsContainer oiqGraphicsContainer;
IElement oiqElement;
IOutputRasterSettings docOutputRasterSettings;
IMapFrame docMapFrame;
IActiveView TmpActiveView;
if (docActiveView is IMap)
{
docOutputRasterSettings = docActiveView.ScreenDisplay.DisplayTransformation as IOutputRasterSettings;
docOutputRasterSettings.ResampleRatio = (int)iResampleRatio;
}
else if (docActiveView is IPageLayout)
{
//assign ResampleRatio for PageLayout
docOutputRasterSettings = docActiveView.ScreenDisplay.DisplayTransformation as IOutputRasterSettings;
docOutputRasterSettings.ResampleRatio = (int)iResampleRatio;
//and assign ResampleRatio to the Maps in the PageLayout
oiqGraphicsContainer = docActiveView as IGraphicsContainer;
oiqGraphicsContainer.Reset();
oiqElement = oiqGraphicsContainer.Next();
while (oiqElement != null)
{
if (oiqElement is IMapFrame)
{
docMapFrame = oiqElement as IMapFrame;
TmpActiveView = docMapFrame.Map as IActiveView;
docOutputRasterSettings = TmpActiveView.ScreenDisplay.DisplayTransformation as IOutputRasterSettings;
docOutputRasterSettings.ResampleRatio = (int)iResampleRatio;
}
oiqElement = oiqGraphicsContainer.Next();
}
docMapFrame = null;
oiqGraphicsContainer = null;
TmpActiveView = null;
}
docOutputRasterSettings = null;
}
private IEnvelope GetGraphicsExtent(IActiveView docActiveView)
{
IEnvelope GraphicsBounds;
IEnvelope GraphicsEnvelope;
IGraphicsContainer oiqGraphicsContainer;
IPageLayout docPageLayout;
IDisplay GraphicsDisplay;
IElement oiqElement;
GraphicsBounds = new EnvelopeClass();
GraphicsEnvelope = new EnvelopeClass();
docPageLayout = docActiveView as IPageLayout;
GraphicsDisplay = docActiveView.ScreenDisplay;
oiqGraphicsContainer = docActiveView as IGraphicsContainer;
oiqGraphicsContainer.Reset();
oiqElement = oiqGraphicsContainer.Next();
while (oiqElement != null)
{
oiqElement.QueryBounds(GraphicsDisplay, GraphicsEnvelope);
GraphicsBounds.Union(GraphicsEnvelope);
oiqElement = oiqGraphicsContainer.Next();
}
return GraphicsBounds;
}
private void DisableFontSmoothing()
{
bool iResult;
int pv = 0;
iResult = SystemParametersInfo(SPI_SETFONTSMOOTHING, 0, ref pv, SPIF_UPDATEINIFILE);
}
private void EnableFontSmoothing()
{
bool iResult;
int pv = 0;
iResult = SystemParametersInfo(SPI_SETFONTSMOOTHING, 1, ref pv, SPIF_UPDATEINIFILE);
}
private Boolean GetFontSmoothing()
{
bool iResult;
int pv = 0;
iResult = SystemParametersInfo(SPI_GETFONTSMOOTHING, 0, ref pv, 0);
if (pv > 0)
{
//pv > 0 means font smoothing is ON.
return true;
}
else
{
//pv == 0 means font smoothing is OFF.
return false;
}
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
来自：http://blog.sina.com.cn/s/blog_47cd421e0100b63n.html