/// <summary>
/// 输出图片
/// </summary>
/// <param name="activeView"></param>
/// <param name="filename"></param>
/// <param name="format"></param>
/// <param name="resolution"></param>
public static void ExportRasterFile(IActiveView activeView, string filename, string format, double resolution)
{
if (activeView == null || filename.Length == 0)
{
return;
}
double screenResolution = resolution;
double outputResolution = resolution;
IExport export = null;
switch (format)
{
case "PDF":
export = new ExportPDFClass();
IExportVectorOptions exportVectorOptions = export as IExportVectorOptions;
exportVectorOptions.PolygonizeMarkers = true;
IExportPDF exportPDF = export as IExportPDF;
exportPDF.EmbedFonts = true;
break;
case "BMP":
export = new ExportBMPClass();
break;
case "JPG":
export = new ExportJPEGClass();
if (filename.IndexOf("彩信") != -1)
{
IExportJPEG exportJPEG = export as IExportJPEG;
exportJPEG.Quality = 70;
outputResolution = 70.0;
}
break;
case "PNG":
export = new ExportPNGClass();
break;
case "TIF":
export = new ExportTIFFClass();
break;
case "GIF":
export = new ExportGIFClass();
break;
case "EMF":
export = new ExportEMFClass();
break;
case "SVG":
export = new ExportSVGClass();
break;
case "AI":
export = new ExportAIClass();
break;
case "EPS":
export = new ExportPSClass();
break;
}
IGraphicsContainer docGraphicsContainer;
IElement docElement;
IOutputRasterSettings docOutputRasterSettings;
IMapFrame docMapFrame;
IActiveView tmpActiveView;
IOutputRasterSettings doOutputRasterSettings;
if (activeView is IMap)
{
doOutputRasterSettings = activeView.ScreenDisplay.DisplayTransformation as IOutputRasterSettings;
doOutputRasterSettings.ResampleRatio = 3;
}
else if (activeView is IPageLayout)
{
doOutputRasterSettings = activeView.ScreenDisplay.DisplayTransformation as IOutputRasterSettings;
doOutputRasterSettings.ResampleRatio = 4;
//and assign ResampleRatio to the maps in the PageLayout.
docGraphicsContainer = activeView as IGraphicsContainer;
docGraphicsContainer.Reset();
docElement = docGraphicsContainer.Next();
int c = 0;
while (docElement != null)
{
c += 1;
if (docElement is IMapFrame)
{
docMapFrame = docElement as IMapFrame;
tmpActiveView = docMapFrame.Map as IActiveView;
docOutputRasterSettings = tmpActiveView.ScreenDisplay.DisplayTransformation as IOutputRasterSettings;
docOutputRasterSettings.ResampleRatio = 1;
}
docElement = docGraphicsContainer.Next();
}
docMapFrame = null;
docGraphicsContainer = null;
tmpActiveView = null;
}
else
{
docOutputRasterSettings = null;
}
//end
export.ExportFileName = filename;
export.Resolution = outputResolution;
tagRECT exportRECT = activeView.ExportFrame;
exportRECT.right = (int)(exportRECT.right * (outputResolution / screenResolution));
exportRECT.bottom = (int)(exportRECT.bottom * (outputResolution / screenResolution));
IEnvelope envelope = new EnvelopeClass();
envelope.PutCoords(exportRECT.left, exportRECT.top, exportRECT.right, exportRECT.bottom);
export.PixelBounds = envelope;
int hDC = export.StartExporting();
activeView.Output(hDC, Convert.ToInt32(export.Resolution), ref exportRECT, null, null);
export.FinishExporting();
export.Cleanup();
}
