从Word文档中提取嵌入对象

落日映苍穹つ 2024-02-17 17:58 6阅读 0赞

**从Word文档中提取嵌入对象**

有时候我们可能需要向word文档中插入一些文档如PDF、Excel等，相反地，有时候我们也会需要从word文档中提取嵌入的对象。这篇文章将讲述如何使用C\#及一个免费Word组件-[FreeSpire.Doc][] 从一个word文档中提取嵌入的对象。

为了展示，我创建了一个word文档并向其中插入了一个PDF文档及一个Excel文档，如下图：

![Center][]

接下来，我将嵌入在以上Word文档中的PDF文档和Excel文档提取出来。

**代码使用：**

**步骤1：**初始化一个Document对象并加载word文档。

Document doc = new Document();
    doc.LoadFromFile("OleObject.docx");

**步骤2：**遍历该word文档，找到嵌入的对象，获取每个嵌入对象的文件类型，判断它是否为PDF或Excel文档，若是PDF文档，则将该嵌入对象的数据写入到一个新的PDF文档。若是Excel文档，则将其数据写入到一个新的Excel文档。

//traverse through all sections of theword document          
    foreach (Section sec in doc.Sections)
    {
       //traverse through all Child Objects in the body of each section
       foreach (DocumentObject obj insec.Body.ChildObjects)
        {
           if (obj is Paragraph)
            {
                Paragraph par = obj as Paragraph;
                //traverse through all Child Objects in Paragraph
               foreach (DocumentObject o inpar.ChildObjects)
                {
                    //Find theOle Objects and Extract
                    if(o.DocumentObjectType == DocumentObjectType.OleObject)
                   {
                        DocOleObject Ole = o as DocOleObject;
                       string s = Ole.ObjectType;
                       //If s == "AcroExch.Document.11",means it’s a PDFdocument
                       if (s == "AcroExch.Document.11")
                       {
                            File.WriteAllBytes("Result.pdf",Ole.NativeData);
                       }
                        //Ifs ==" Excel.Sheet.12",means it’s anExcel workbook
                       else if(s == "Excel.Sheet.12")
                       {
                            File.WriteAllBytes("Result.xlsx",Ole.NativeData);
                       }
                   }
                }
            }
        }
    }

运行代码，得到如下PDF及Excel结果文档：

![Center 1][]

![Center 2][]

**完整代码如下：**

using System.IO;
    using Spire.Doc;
    using Spire.Doc.Documents;
    using Spire.Doc.Fields;
     
    namespace Extract_OLEObjects_from_Word
    {
        class Program
        {
            static void Main(string[] args)
            {
                Document doc = newDocument();
               doc.LoadFromFile("OleObject.docx");
           
                foreach (Sectionsec in doc.Sections)
                {
                   foreach (DocumentObjectobj in sec.Body.ChildObjects)
                   {
                       if (obj isParagraph)
                       {
                            Paragraph par = obj as Paragraph;
                            foreach (DocumentObject o in par.ChildObjects)
                            {
                                if (o.DocumentObjectType == DocumentObjectType.OleObject)
                                {
                                    DocOleObject Ole = o asDocOleObject;
                                    string s = Ole.ObjectType;
                                    if (s == "AcroExch.Document.11")
                                    {
                                        File.WriteAllBytes("Result.pdf",Ole.NativeData);
                                    }
                                    else if (s == "Excel.Sheet.12")
                                    {
                                        File.WriteAllBytes("Result.xlsx",Ole.NativeData);
                                    }
                                }
                            }
                       }
                   }
                }
            }
        }
    }

[FreeSpire.Doc]: http://www.e-iceblue.com/Introduce/free-doc-component.html#.V9EcMW4cpZ0
[Center]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/bae183f564a04155a880327e3c46adfc.png
[Center 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/6acfed737498498494c814e33f4c9be9.png
[Center 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/461146e2b1f046f0ad16e7c0321df495.png