Npoi XWPF Word 导出时插入图片无法显示

1. npoi中XWPFRun.AddPicture,各种尝试,各种看源代码,也无法将插入的图片显示出来,用RAR程序打开word查看Document.xml文件,提示xml文件错误.在网上找到java的poi的解决办法,自定义Pic元素.

       int EMU = 9525;
               width *= EMU;
               height *= EMU;
   
               var run = doc.CreateParagraph().CreateRun();
               CT_Inline inline = run.GetCTR().AddNewDrawing().AddNewInline();
   
               String picXml = ""
                   //+ "<a:graphic xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\">"
                   //+ "   <a:graphicData uri=\"http://schemas.openxmlformats.org/drawingml/2006/picture\">"
                       + "      <pic:pic xmlns:pic=\"http://schemas.openxmlformats.org/drawingml/2006/picture\" xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\">"
                       + "         <pic:nvPicPr>" + "            <pic:cNvPr id=\""
                       + "0"
                       + "\" name=\"Generated\"/>"
                       + "            <pic:cNvPicPr/>"
                       + "         </pic:nvPicPr>"
                       + "         <pic:blipFill>"
                       + "            <a:blip r:embed=\""
                       + id
                       + "\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\"/>"
                       + "            <a:stretch>"
                       + "               <a:fillRect/>"
                       + "            </a:stretch>"
                       + "         </pic:blipFill>"
                       + "         <pic:spPr>"
                       + "            <a:xfrm>"
                       + "               <a:off x=\"0\" y=\"0\"/>"
                       + "               <a:ext cx=\""
                       + width
                       + "\" cy=\""
                       + height
                       + "\"/>"
                       + "            </a:xfrm>"
                       + "            <a:prstGeom prst=\"rect\">"
                       + "               <a:avLst/>"
                       + "            </a:prstGeom>"
                       + "         </pic:spPr>"
                       + "      </pic:pic>";
               //+ "   </a:graphicData>" + "</a:graphic>";
   
               CT_GraphicalObjectData graphicData = inline.graphic.AddNewGraphicData();
               graphicData.uri = "http://schemas.openxmlformats.org/drawingml/2006/picture";
   
               XmlDocument xmlDoc = new XmlDocument();
               try {
                   xmlDoc.LoadXml(picXml);
                   var element = xmlDoc.DocumentElement;
                   graphicData.AddPicElement(element);
   
               } catch (XmlException xe) {
               }
   
               CT_PositiveSize2D extent = inline.AddNewExtent();
               extent.cx = width;
               extent.cy = height;
   
               CT_NonVisualDrawingProps docPr = inline.AddNewDocPr();
               docPr.id = 1;
               docPr.name = "图片" + id;

2. 需要强调的是:

     <pic:pic xmlns:pic=\"http://schemas.openxmlformats.org/drawingml/2006/picture\" xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\">"

   这行代码中需要把xmlns:a定义出来,因为标签中含有a的使用,需要定义这个命名空间的本地名称.否则在创建元素时会抛出异常.

3. 下边的这行代码也是必不可少的.

4.     graphicData.uri = "http://schemas.openxmlformats.org/drawingml/2006/picture";

5. 源代码中的方法,不知道为什么创建PIC标签的内容的代码,都没能序列化出来.可能是我还没有找到正确的使用方法,或者是不够完善吧.

测试的源代码CS文件:

    public class XWPFInsertPicture
    {
        public void WordIndertPicTest()
        {
            var wordDoc = new XWPFDocument();
            var picAbsolutePath = @"D:\Test.png";
            if (File.Exists(picAbsolutePath)) {
                var picID = wordDoc.AddPictureData(new FileStream(picAbsolutePath, FileMode.Open), (int)PictureType.PNG);
                CreatePicture(wordDoc, picID, 100, 100);
            }

            var outputPath = Path.Combine(@"D:\", Guid.NewGuid().ToString() + ".docx");
            var writeStream = new FileStream(outputPath, FileMode.Create);
            wordDoc.Write(writeStream);
            writeStream.Close();
        }

        public static void CreatePicture(XWPFDocument doc, string id, int width, int height)
        {
            int EMU = 9525;
            width *= EMU;
            height *= EMU;

            var run = doc.CreateParagraph().CreateRun();
            CT_Inline inline = run.GetCTR().AddNewDrawing().AddNewInline();

            String picXml = ""
                //+ "<a:graphic xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\">"
                //+ "   <a:graphicData uri=\"http://schemas.openxmlformats.org/drawingml/2006/picture\">"
                    + "      <pic:pic xmlns:pic=\"http://schemas.openxmlformats.org/drawingml/2006/picture\" xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\">"
                    + "         <pic:nvPicPr>" + "            <pic:cNvPr id=\""
                    + "0"
                    + "\" name=\"Generated\"/>"
                    + "            <pic:cNvPicPr/>"
                    + "         </pic:nvPicPr>"
                    + "         <pic:blipFill>"
                    + "            <a:blip r:embed=\""
                    + id
                    + "\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\"/>"
                    + "            <a:stretch>"
                    + "               <a:fillRect/>"
                    + "            </a:stretch>"
                    + "         </pic:blipFill>"
                    + "         <pic:spPr>"
                    + "            <a:xfrm>"
                    + "               <a:off x=\"0\" y=\"0\"/>"
                    + "               <a:ext cx=\""
                    + width
                    + "\" cy=\""
                    + height
                    + "\"/>"
                    + "            </a:xfrm>"
                    + "            <a:prstGeom prst=\"rect\">"
                    + "               <a:avLst/>"
                    + "            </a:prstGeom>"
                    + "         </pic:spPr>"
                    + "      </pic:pic>";
            //+ "   </a:graphicData>" + "</a:graphic>";

            CT_GraphicalObjectData graphicData = inline.graphic.AddNewGraphicData();
            graphicData.uri = "http://schemas.openxmlformats.org/drawingml/2006/picture";

            XmlDocument xmlDoc = new XmlDocument();
            try {
                xmlDoc.LoadXml(picXml);
                var element = xmlDoc.DocumentElement;
                graphicData.AddPicElement(element);

            } catch (XmlException xe) {
            }

            CT_PositiveSize2D extent = inline.AddNewExtent();
            extent.cx = width;
            extent.cy = height;

            CT_NonVisualDrawingProps docPr = inline.AddNewDocPr();
            docPr.id = 1;
            docPr.name = "图片" + id;
        }
    }