打開XML SDK-在Sharepoint文檔中插入圖片

Question

我在Sharepoint解決方案中使用開放xml sdk 2.0時遇到了問題。 我的目標是使用圖像的網址作為添加到列表中的用戶模板文件的圖像的網址，精確地添加到文件末尾的附件，但總是文件末尾損壞，並且在恢復時將其作為圖片沒有顯示。

我將發布我正在使用的代碼：

        public static String teste()
    {
        //Url image for test
        string fileName = @"http://upload.wikimedia.org/wikipedia/commons/2/2a/Junonia_lemonias_DSF_upper_by_Kadavoor.JPG";
        return InsertAPicture(fileName);
    }

public static String InsertAPicture(string fileName)
    {

        SPWeb web = SPContext.Current.Web;
        web.AllowUnsafeUpdates = true;
        SPList list = web.Lists["Documentos Compartilhados"]; //I'm using Portuguese Sharepoint
        SPListItem item = list.GetItemById(5); //For test only
        byte[] byteArray = item.File.OpenBinary();
        using (MemoryStream memStr = new MemoryStream())
        {
            memStr.Write(byteArray, 0, byteArray.Length);


            using (WordprocessingDocument doc = WordprocessingDocument.Open(memStr, true))
            {
                MainDocumentPart mainPart = doc.MainDocumentPart;

                ImagePart imagePart = mainPart.AddImagePart(ImagePartType.Jpeg);

                WebClient myWebClient = new WebClient();
                byte[] myDataBuffer = myWebClient.DownloadData(fileName);

                using (MemoryStream image = new MemoryStream())
                {
                    image.Write(myDataBuffer, 0, myDataBuffer.Length);

                    imagePart.FeedData(image);
                }

                AddImageToBody(doc, mainPart.GetIdOfPart(imagePart));

                OpenXmlValidator validator = new OpenXmlValidator();
                var errors = validator.Validate(doc);
                Boolean valido = true;
                String s = "";
                foreach (ValidationErrorInfo error in errors)
                {
                    s += error.Description + "    ";
                    valido = false;
                } //Just checking for erros, the code it's not returing any

                if (valido)
                {
                    doc.MainDocumentPart.Document.Save();

                    string linkFileName = item.File.Item["LinkFilename"] as string;
                    item.File.ParentFolder.Files.Add(linkFileName, memStr, true);

                    return "";
                }
                else {
                    return s;
                }
            }
        }
    }

private static void AddImageToBody(WordprocessingDocument wordDoc, string relationshipId)
    {
        var element =
                    new Drawing(
                        new DW.Inline(
                            new DW.Extent() { Cx = 990000L, Cy = 792000L },
                            new DW.EffectExtent()
                            {
                                LeftEdge = 0L,
                                TopEdge = 0L,
                                RightEdge = 0L,
                                BottomEdge = 0L
                            },
                            new DW.DocProperties()
                            {
                                Id = (UInt32Value)1U,
                                Name = "Picture 1"
                            },
                            new DW.NonVisualGraphicFrameDrawingProperties(
                                new A.GraphicFrameLocks() { NoChangeAspect = true }),
                            new A.Graphic(
                                new A.GraphicData(
                                    new PIC.Picture(
                                        new PIC.NonVisualPictureProperties(
                                            new PIC.NonVisualDrawingProperties()
                                            {
                                                Id = (UInt32Value)0U,
                                                Name = "Pic.jpg"
                                            },
                                            new PIC.NonVisualPictureDrawingProperties()),
                                        new PIC.BlipFill(
                                            new A.Blip(
                                                new A.BlipExtensionList(
                                                    new A.BlipExtension()
                                                    {
                                                        Uri =
                                                          "{28A0092B-C50C-407E-A947-70E740481C1C}"
                                                    })
                                            )
                                            {
                                                Embed = relationshipId,
                                                CompressionState =
                                                A.BlipCompressionValues.Print
                                            },
                                            new A.Stretch(
                                                new A.FillRectangle())),
                                        new PIC.ShapeProperties(
                                            new A.Transform2D(
                                                new A.Offset() { X = 0L, Y = 0L },
                                                new A.Extents() { Cx = 990000L, Cy = 792000L }),
                                            new A.PresetGeometry(
                                                new A.AdjustValueList()
                                            ) { Preset = A.ShapeTypeValues.Rectangle }))
                                ) { Uri = "http://schemas.openxmlformats.org/drawingml/2006/picture" })
                        )
                        {
                            DistanceFromTop = (UInt32Value)0U,
                            DistanceFromBottom = (UInt32Value)0U,
                            DistanceFromLeft = (UInt32Value)0U,
                            DistanceFromRight = (UInt32Value)0U
                        });

        // Append the reference to body, the element should be in a Run.
        wordDoc.MainDocumentPart.Document.Body.InsertBefore(new Paragraph(new Run(element)), wordDoc.MainDocumentPart.Document.Body.LastChild);
    }

有人對我做錯了什么有想法？

Answer 1

創建圖像流后，它的數據指針顯示在該流的末尾，從而導致沒有數據饋入imagePart。 將數據指針移到流的開頭

using (MemoryStream image = new MemoryStream())
{
    image.Write(myDataBuffer, 0, myDataBuffer.Length);
    image.Position = 0;  //<----
    imagePart.FeedData(image);
}

Answer 2

首先，考慮到要從文檔庫獲取圖像，可以將列表項文件作為流打開。

protected ClientResult<Stream> OpenFileFromListItemAsStream(ClientContext context, string libraryTitle, string filename)
    {
        //source list and list item
        var sourceList = context.Web.Lists.GetByTitle(libraryTitle);
        var sourceListItems = sourceList.GetItems(new CamlQuery
        {
            ViewXml = "<View><Query><Where><Eq><FieldRef Name='FileLeafRef'/><Value Type='Text'>" + filename + "</Value></Eq></Where></Query></</View>"
        });
        context.Load(sourceListItems);
        context.ExecuteQuery();

        ListItem sourceListItem = null;
        if (sourceListItems != null && sourceListItems.Count() > 0)
            sourceListItem = sourceListItems.FirstOrDefault();

        var fileStream = sourceListItem.File.OpenBinaryStream();
        context.Load(sourceListItem);
        context.Load(sourceListItem.File);
        context.ExecuteQuery();

        return fileStream;
    }

然后創建一個內存流並將位置設置為0

var imageStream = OpenFileFromListItemAsStream(imageContext, imageEntity.LibraryTitle, imageEntity.Filename);
                                    using (MemoryStream memStream = new MemoryStream())
                                    {
                                        imageStream.Value.CopyTo(memStream);
                                        memStream.Position = 0;
                                        imagePart.FeedData(memStream);
                                    }

最后...

AddImageToBody(doc, mainPart.GetIdOfPart(imagePart));