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using System;

using DocumentFormat.OpenXml.Packaging;

using System.IO;

using System.Linq;

using DocumentFormat.OpenXml;

using DocumentFormat.OpenXml.Presentation;

using A = DocumentFormat.OpenXml.Drawing;

using P14 = DocumentFormat.OpenXml.Office2010.PowerPoint;

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public void PptInfo(string path)

{

    using (var doc = PresentationDocument.Open(path,false))

    {

        var presentation = doc.PresentationPart.Presentation;

        foreach (SlideId slideIdin presentation.SlideIdList)

        {

            SlidePart slidePart = doc.PresentationPart.GetPartById(slideId.RelationshipId)as SlidePart;

            if (slidePart ==null || slidePart.Slide ==null)

                continue;

            //ppt中显示的真实编号

            var SlideNumber = presentation.FirstSlideNum?.Value ?? 1 + presentation.SlideIdList.ToList().IndexOf(slideId);

            Slide slide = slidePart.Slide;

            //音频

            var audioList = slide.Descendants<Audio>();

            //视频

            var videoList = slide.Descendants<Video>();

            //图片

            var picList = slide.CommonSlideData.ShapeTree.Descendants<Picture>().Where(o => !o.NonVisualPictureProperties.ApplicationNonVisualDrawingProperties.Any());

            //文本框

            var txBodyList = slide.CommonSlideData.ShapeTree.Descendants<TextBody>();

            //提取音视频（将 audioList 换成 videoList ）就行了

            foreach (var mediain audioList)

            {

                //音频关联的形状

                var spTgt = media.CommonMediaNode.TargetElement.ShapeTarget;

                //形状属性

                var cNvPr = slide.Descendants<NonVisualDrawingProperties>().FirstOrDefault(o => o.Id == spTgt.ShapeId);

                //形状信息

                var ShapeId = cNvPr.Id.Value;

                var ShapeName = cNvPr.Name.Value;

                var ShapeDescr = cNvPr.Description?.Value;

                //上级和上上级

                var nvPicPr = (NonVisualPictureProperties)cNvPr.Parent;

                var pic = (Picture)nvPicPr.Parent;

                //音频文件关联

                var audioFile = nvPicPr.ApplicationNonVisualDrawingProperties.Elements<A.AudioFromFile>().FirstOrDefault();

                ////视频文件关联

                //var videoFile = nvPicPr.ApplicationNonVisualDrawingProperties.Elements<A.VideoFromFile>().FirstOrDefault();

                //获取音视频文件 外部/内部

                var uri = slidePart.ExternalRelationships.FirstOrDefault(o => o.Id == audioFile.Link)?.Uri;//外部关系

                if (uri ==null)

                {

                    var dataPartReferenceRelationship = slidePart.DataPartReferenceRelationships.FirstOrDefault(o => o.Id == audioFile.Link);//内部关系

                    var mediaStream = dataPartReferenceRelationship.DataPart.GetStream();

                    uri = dataPartReferenceRelationship?.Uri;

                }

                //媒体文件关联的图片

                var embed = pic.BlipFill.Blip.Embed.Value;

                var part = slidePart.GetPartById(embed);

                var imgStream = part.GetStream();

            }

            //提取图片

            foreach (var picin picList)

            {

                var cNvPr = pic.NonVisualPictureProperties.NonVisualDrawingProperties;

                //形状信息

                var ShapeId = cNvPr.Id.Value;

                var ShapeName = cNvPr.Name.Value;

                var ShapeDescr = cNvPr.Description?.Value;

                //获取图片

                var embed = pic.BlipFill.Blip.Embed.Value;

                var part = slidePart.GetPartById(embed);

                var imgStream = part.GetStream();

            }

            //提取文本

            foreach (var txBodyin txBodyList)

            {

                //上级

                var sp = (Shape)txBody.Parent;

                //形状属性

                var cNvPr = sp.NonVisualShapeProperties.NonVisualDrawingProperties;

                //形状信息

                var ShapeId = cNvPr.Id.Value;

                var ShapeName = cNvPr.Name.Value;

                //获取文本信息

                //方式1

                var text = txBody.InnerText;

                //方式2

                var texts = txBody.Descendants<A.Text>();

                text =string.Join(null, texts.Select(o => o.Text));

                //获取文本信息（含段落）

                var ps = txBody.Descendants<A.Paragraph>();

                text =string.Join(Environment.NewLine, ps.Select(o => o.InnerText));

            }

        }

    }

}