我是OpenXML的新手，在这里我正在尝试将图表数据导出到powerpoint。在代码中我试图将其保存为excel文件然后再保存到powerpoint，同时尝试单击导出按钮它向我显示错误信息（写成aheading）。我是我的代码。
protected void btnExport_Click(object sender, EventArgs e)
{
try
{
// Open an existing Presentation
PresentationDocument oPDoc = PresentationDocument.Open(@"D:\Chart.pptx", true);
PresentationPart oPPart = oPDoc.PresentationPart;
// Get the ReleationshipId of the first Slide
SlideId slideId = oPPart.Presentation.SlideIdList.GetFirstChild<SlideId>();
string relId = slideId.RelationshipId;
// Get the slide part by the relationship ID.
SlidePart slidePart = (SlidePart)oPPart.GetPartById(relId);
// Add a new chart part
ChartPart chPrt = slidePart.AddNewPart<ChartPart>();
XmlDocument xDoc = new XmlDocument();
String strFileName = "D:\\chart1.xml";
xDoc.Load(strFileName);
StreamWriter objDocMainWrt = new StreamWriter(chPrt.GetStream(FileMode.Create, FileAccess.Write));
xDoc.Save(objDocMainWrt);
// Add the data Sheet for the Chart
ExtendedPart objEmbPart = chPrt.AddExtendedPart("http://schemas.openxmlformats.org/officeDocument/2006/relationships/package", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", ".xlsx");
strFileName = "D:\\chartData.xlsx";
FileStream partStream = new FileStream(strFileName, FileMode.Open, FileAccess.Read);
objEmbPart.FeedData(partStream);
// Change the Data releation ID used in Chart.xml
// Elemenet changed : c:externalData
string relChtDataID = chPrt.GetIdOfPart(objEmbPart);
XmlNamespaceManager nsManager1 = new XmlNamespaceManager(xDoc.NameTable);
XmlNamespaceManager nsManagerDraw = new XmlNamespaceManager(xDoc.NameTable);
//nsManager1.AddNamespace("c", "http://schemas.openxmlformats.org/drawingml/2006/chart");
nsManagerDraw.AddNamespace("d", "http://schemas.openxmlformats.org/drawingml/2006/chart");
//XmlNodeList nodeTest = xDoc.SelectNodes("//c:externalData", nsManager1);
XmlNodeList nodeTest = xDoc.SelectNodes("//d:chart1", nsManagerDraw);
foreach (XmlNode node in nodeTest)
{
node.Attributes["r:id"].Value = relChtDataID;
}
// Save changes back to Chart.xml
xDoc.Save(chPrt.GetStream(FileMode.Create, FileAccess.Write));
// Get the SlidePart Stream
const string presentationmlNamespace = "http://schemas.openxmlformats.org/presentationml/2006/main";
NameTable nt = new NameTable();
XmlNamespaceManager nsManager = new XmlNamespaceManager(nt);
nsManager.AddNamespace("p", presentationmlNamespace);
XmlDocument presXML = new XmlDocument(nt);
presXML.Load(slidePart.GetStream());
// Get the spTree Element in SlidePart
XmlNode nodeTree = presXML.SelectSingleNode("//p:spTree", nsManager);
string rid = slidePart.GetIdOfPart(chPrt).ToString();
// Generate the Graphic Element for the Chart
XmlNode childNode = GenerateNode(rid);
//Append the Graphic Element to spTree Element in SlidePart
nodeTree.AppendChild(presXML.ImportNode(childNode, true));
Stream o = slidePart.GetStream();
presXML.Save(o);
oPDoc.Close();
}
catch (Exception msg)
{
Response.Write(msg.ToString());
}
}
private XmlNode GenerateNode(String rId)
{
XmlDocument xwb = new XmlDocument();
xwb.AppendChild(xwb.CreateXmlDeclaration("1.0", "UTF-8", "yes"));
XmlNamespaceManager xmlns = new XmlNamespaceManager(xwb.NameTable);
xmlns.AddNamespace("p", "http://schemas.openxmlformats.org/presentationml/2006/main");
xmlns.AddNamespace("r", "http://schemas.openxmlformats.org/officeDocument/2006/relationships");
xmlns.AddNamespace("a", "http://schemas.openxmlformats.org/drawingml/2006/main");
XmlElement eleGraphic = xwb.CreateElement("p:graphicFrame", xmlns.LookupNamespace("p"));
xwb.AppendChild(eleGraphic);
XmlElement eleGrpFrm = xwb.CreateElement("p:nvGraphicFramePr", xmlns.LookupNamespace("p"));
eleGraphic.AppendChild(eleGrpFrm);
XmlElement elePpr = xwb.CreateElement("p:cNvPr", xmlns.LookupNamespace("p"));
eleGrpFrm.AppendChild(elePpr);
XmlAttribute attrRid = xwb.CreateAttribute("id");
attrRid.Value = "4";
elePpr.SetAttributeNode(attrRid);
XmlAttribute attrName = xwb.CreateAttribute("name");
attrName.Value = "Chart 2";
elePpr.SetAttributeNode(attrName);
XmlElement elecNvGraphicFramePr = xwb.CreateElement("p:cNvGraphicFramePr", xmlns.LookupNamespace("p"));
eleGrpFrm.AppendChild(elecNvGraphicFramePr);
XmlElement elenvPr = xwb.CreateElement("p:nvPr", xmlns.LookupNamespace("p"));
eleGrpFrm.AppendChild(elenvPr);
XmlElement elexfrm = xwb.CreateElement("p:xfrm", xmlns.LookupNamespace("p"));
eleGraphic.AppendChild(elexfrm);
XmlElement eleoff = xwb.CreateElement("a:off", xmlns.LookupNamespace("a"));
elexfrm.AppendChild(eleoff);
XmlAttribute xvalue = xwb.CreateAttribute("x");
xvalue.Value = "1524000";
eleoff.SetAttributeNode(xvalue);
XmlAttribute yvalue = xwb.CreateAttribute("y");
yvalue.Value = "1397000";
eleoff.SetAttributeNode(yvalue);
XmlElement eleext = xwb.CreateElement("a:ext", xmlns.LookupNamespace("a"));
elexfrm.AppendChild(eleext);
XmlAttribute cxvalue = xwb.CreateAttribute("cx");
cxvalue.Value = "6096000";
eleext.SetAttributeNode(cxvalue);
XmlAttribute cyvalue = xwb.CreateAttribute("cy");
cyvalue.Value = "4064000";
eleext.SetAttributeNode(cyvalue);
//<c:chart xmlns:c="http://schemas.openxmlformats.org/drawingml/2006/chart" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" r:id="rId2"/></a:graphicData></a:graphic></p:graphicFrame>
XmlElement elegraphic = xwb.CreateElement("a:graphic", xmlns.LookupNamespace("a"));
eleGraphic.AppendChild(elegraphic);
XmlElement elegraphicData = xwb.CreateElement("a:graphicData", xmlns.LookupNamespace("a"));
elegraphic.AppendChild(elegraphicData);
XmlAttribute uri = xwb.CreateAttribute("uri");
uri.Value = "http://schemas.openxmlformats.org/drawingml/2006/chart";
elegraphicData.SetAttributeNode(uri);
XmlElement elechart = xwb.CreateElement("c:chart", "http://schemas.openxmlformats.org/drawingml/2006/chart");
elegraphicData.AppendChild(elechart);
XmlAttribute id = xwb.CreateAttribute("r:id", xmlns.LookupNamespace("r"));
id.Value = rId;
elechart.SetAttributeNode(id);
XmlNode ss1 = xwb.SelectSingleNode("//p:graphicFrame", xmlns);
return ss1;
//xwb.Save(@"C:\temp\test1.xml");
}
请告诉我错误的地方。
答案 0 :(得分：1)
尝试下面的代码，在此之前创建空的ppt模板并使用两个图表控件进行excel。
string paramPresentationPath = @"D:\Chart.pptx";
string paramWorkbookPath = @"D:\chartData.xlsx";
object paramMissing = Type.Missing;
powerpointApplication = new pptNS.Application();
// Create an instance Excel.
excelApplication = new xlNS.Application();
// Open the Excel workbook containing the worksheet with the chart
// data.
excelWorkBook = excelApplication.Workbooks.Open(paramWorkbookPath,
paramMissing, paramMissing, paramMissing,
paramMissing, paramMissing, paramMissing,
paramMissing, paramMissing, paramMissing,
paramMissing, paramMissing, paramMissing,
paramMissing, paramMissing);
// Get the worksheet that contains the chart.
targetSheet = (xlNS.Worksheet)(excelWorkBook.Worksheets[1]);//here 1 is sheet no.
// Get the ChartObjects collection for the sheet.
chartObjects = (xlNS.ChartObjects)(targetSheet.ChartObjects(paramMissing));
// Get the chart to copy.
existingChartObject = (xlNS.ChartObject)(chartObjects.Item("Chart Name in Excel"));
// Create a PowerPoint presentation.
pptPresentation = powerpointApplication.Presentations.Add(
Microsoft.Office.Core.MsoTriState.msoTrue);
// Add a blank slide to the presentation.
pptSlide = pptPresentation.Slides.Add(1, pptNS.PpSlideLayout.ppLayoutBlank);
// Copy the chart from the Excel worksheet to the clipboard.
existingChartObject.Copy();
// Paste the chart into the PowerPoint presentation.
shapeRange = pptSlide.Shapes.Paste();
// Position the chart on the slide.
shapeRange.Left = 30;
shapeRange.Top = 100;
// Width and Height on the Slide.
shapeRange.Width = 600;
shapeRange.Height = 400;
///<summary>
///Second Slide
///</summary>
// Get the worksheet that contains the chart.
targetSheet = (xlNS.Worksheet)(excelWorkBook.Worksheets[2]);
// Get the ChartObjects collection for the sheet.
chartObjects = (xlNS.ChartObjects)(targetSheet.ChartObjects(paramMissing));
// Get the chart to copy.
existingChartObject = (xlNS.ChartObject)(chartObjects.Item("Chart Name in excel"));
//// Create a PowerPoint presentation.
//pptPresentation = powerpointApplication.Presentations.Add(
// Microsoft.Office.Core.MsoTriState.msoTrue);
// Add a blank slide to the presentation.
pptSlide = pptPresentation.Slides.Add(2, pptNS.PpSlideLayout.ppLayoutBlank);
// Copy the chart from the Excel worksheet to the clipboard.
existingChartObject.Copy();
// Paste the chart into the PowerPoint presentation.
shapeRange = pptSlide.Shapes.Paste();
// Position the chart on the slide.
shapeRange.Left = 30;
shapeRange.Top = 100;
// Width and Height on the Slide.
shapeRange.Width = 600;
shapeRange.Height = 400;
// Save the presentation.
pptPresentation.SaveAs(paramPresentationPath,
pptNS.PpSaveAsFileType.ppSaveAsOpenXMLPresentation,
Microsoft.Office.Core.MsoTriState.msoTrue);
//pptPresentation.Close();
}
catch (Exception msg)
{
Response.Write(msg.ToString());
}
finally
{
shapeRange = null;
pptSlide = null;
object paramMissing = Type.Missing;
// Close and release the Presentation object.
if (pptPresentation != null)
{
pptPresentation.Close();
Marshal.FinalReleaseComObject(pptPresentation);
//Marshal.ReleaseComObject(pptPresentation.Slides);
pptPresentation = null;
}
// Quit PowerPoint and release the ApplicationClass object.
if (powerpointApplication != null)
{
powerpointApplication.Quit();
Marshal.FinalReleaseComObject(powerpointApplication);
powerpointApplication = null;
}
// Release the Excel objects.
targetSheet = null;
chartObjects = null;
existingChartObject = null;
//Close and release the Excel Workbook object.
if (excelWorkBook != null)
{
excelWorkBook.Close(false, paramMissing, paramMissing);
Marshal.FinalReleaseComObject(excelWorkBook);
excelWorkBook = null;
}
// Quit Excel and release the ApplicationClass object.
if (excelApplication != null)
{
excelApplication.Quit();
Marshal.FinalReleaseComObject(excelApplication);
excelApplication = null;
//System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApplication);
}
////releaseObject(ref excelApplication);
////releaseObject(ref powerpointApplication);
System.Diagnostics.Process[] excelprc = System.Diagnostics.Process.GetProcessesByName("EXCEL");
if (excelprc.Length == 1)
{
excelprc[0].Kill();
}
System.Diagnostics.Process[] ppprc = System.Diagnostics.Process.GetProcessesByName("POWERPNT");
if (ppprc.Length == 1)
{
ppprc[0].Kill();
}
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
GC.WaitForPendingFinalizers();