Question

我正在尝试提取word文档，它有嵌入文件（word，excel，package）。我无法提取包并使用C＃Open XML保存它。

以下代码只提取word和excel但不提取包。

    using (WordprocessingDocument document = WordprocessingDocument.Open(fileName, false))
                    {
foreach (EmbeddedPackagePart pkgPart in document.MainDocumentPart.GetPartsOfType<EmbeddedPackagePart>())
                        {
                           if (pkgpart.uri.tostring().startswith(embeddingpartstring))
                           {
                               string filename1 = pkgpart.uri.tostring().remove(0, embeddingpartstring.length);
                               // get the stream from the part
                               system.io.stream partstream = pkgpart.getstream();
                               string filepath = "d:\\test\\" + filename1;

                               // write the steam to the file.
                               system.io.filestream writestream = new system.io.filestream(filepath, filemode.create, fileaccess.write);
                               readwritestream(pkgpart.getstream(), writestream);
                           }
                        }

                    }

Answer 1

你遇到的问题是，当你去MainDocument.Parts并开始搜索时，你会得到的东西是“Imagepart”，“ChartPart”等等，其中ChartPart可能拥有它自己的嵌入部分，这可能是您正在寻找的Excel或Word文件。

简而言之，您需要将对嵌入部件的搜索扩展到mainDocument中的实际部件。

如果我只想从我自己的项目中提取其中一个文件中的所有嵌入部分，我会这样做。

using (var document = WordprocessingDocument.Open(@"C:\Test\myTestDocument.docx", false))
{
    //just grab all the parts, might be relevant to be a bit more clever about it, depending on sizes of files and how many files you want to search through
    foreach(var part in document.MainDocumentPart.Parts)
    {
        //foreach part see if that part containts an EmbeddedPackagePart
        var testForEmbedding = part.OpenXmlPart.GetPartsOfType<EmbeddedPackagePart>();
        foreach(EmbeddedPackagePart embedding in testForEmbedding)
        {
            //You should probably insert some clever naming scheme here..
            string fileName = embedding.Uri.OriginalString.Split('/').Last();
            //stream the EmbeddedPackagePart to a file
            using(FileStream myFile = File.Create(@"C:\test\" + fileName))
            using (var stream = embedding.GetStream())
            {
                stream.Seek(0, SeekOrigin.Begin);
                stream.CopyTo(myFile);
                myFile.Close();
            }
        }
    }
}

我希望这有帮助！

使用open xml从word文档中提取嵌入的包文件？

1 个答案: