Insert watermark (background image) in word document using OPEN XML SDK

Insert watermark in word document using OPEN XML SDK

// if watermark image is available in site assets document library then attach to document

                        SPFile waterMarkFile = GetWatermarkImage(watermarkFleName);

                        if (waterMarkFile != null)

                        {

                            InsertCustomWatermark(myDoc, waterMarkFile);

                        }

    #region Watermark

        private void InsertCustomWatermark(WordprocessingDocument package, SPFile p)

        {

            try

            {

                SetWaterMarkPicture(p);

                MainDocumentPart mainDocumentPart1 = package.MainDocumentPart;

                if (mainDocumentPart1 != null)

                {

                    //mainDocumentPart1.DeleteParts(mainDocumentPart1.HeaderParts);

                    HeaderPart headPart1 = mainDocumentPart1.AddNewPart<HeaderPart>();

                    GenerateHeaderPart1Content(headPart1);

                    string rId = mainDocumentPart1.GetIdOfPart(headPart1);

                    ImagePart image = headPart1.AddNewPart<ImagePart>("image/jpeg", "rId999");

                    GenerateImagePart1Content(image);

                    IEnumerable<SectionProperties> sectPrs = mainDocumentPart1.Document.Body.Elements<SectionProperties>();

                    foreach (var sectPr in sectPrs)

                    {

                        sectPr.RemoveAllChildren<HeaderReference>();

                        sectPr.PrependChild<HeaderReference>(new HeaderReference() { Id = rId });

                    }

                }

            }

            catch (Exception ex)

            {

                ULSLogService.DisplayError(this.GetType().Name + "." + MethodBase.GetCurrentMethod().Name, ex);

            }

        }

        private void GenerateHeaderPart1Content(HeaderPart headerPart1)

        {

            try

            {

                Header header1 = new Header();

                Paragraph paragraph2 = new Paragraph();

                Run run1 = new Run();

                Picture picture1 = new Picture();

                V.Shape shape1 = new V.Shape() { Id = "WordPictureWatermark75517470", Style = "position:absolute;left:0;text-align:left;margin-left:0;margin-top:0;width:415.2pt;height:456.15pt;z-index:-251656192;mso-position-horizontal:center;mso-position-horizontal-relative:margin;mso-position-vertical:center;mso-position-vertical-relative:margin", OptionalString = "_x0000_s2051", AllowInCell = false, Type = "#_x0000_t75" };

                V.ImageData imageData1 = new V.ImageData() { Gain = "19661f", BlackLevel = "22938f", Title = "水印", RelationshipId = "rId999" };

                shape1.Append(imageData1);

                picture1.Append(shape1);

                run1.Append(picture1);

                paragraph2.Append(run1);

                header1.Append(paragraph2);

                headerPart1.Header = header1;

            }

            catch (Exception ex)

            {

                ULSLogService.DisplayError(this.GetType().Name + "." + MethodBase.GetCurrentMethod().Name, ex);

            }

        }

        private void GenerateImagePart1Content(ImagePart imagePart1)

        {

            try

            {

                System.IO.Stream data = GetBinaryDataStream(imagePart1Data);

                imagePart1.FeedData(data);

                data.Close();

            }

            catch (Exception ex)

            {

                ULSLogService.DisplayError(this.GetType().Name + "." + MethodBase.GetCurrentMethod().Name, ex);

            }

        }

        private string imagePart1Data = "";

        private System.IO.Stream GetBinaryDataStream(string base64String)

        {

            return new System.IO.MemoryStream(System.Convert.FromBase64String(base64String));

        }

        public void SetWaterMarkPicture(SPFile file)

        {

            try

            {

                byte[] byteArray = file.OpenBinary();

                imagePart1Data = System.Convert.ToBase64String(byteArray, 0, byteArray.Length);

            }

            catch (Exception ex)

            {

                ULSLogService.DisplayError(this.GetType().Name + "." + MethodBase.GetCurrentMethod().Name, ex);

            }

        }

        #endregion

   #region Get Item from Site Assets Library

        private SPFile GetWatermarkImage(string ItemName)

        {

            SPFile file = null;

            try

            {

                SPSecurity.RunWithElevatedPrivileges(delegate()

                   {

                       using (SPSite spSite = new SPSite(SPContext.Current.Web.Url + "/sites/training"))

                       {

                           using (SPWeb spWeb = spSite.OpenWeb())

                           {

                               spWeb.AllowUnsafeUpdates = true;

                               SPList spList = spWeb.Lists.TryGetList("Site Assets");

                               if (spList != null)

                               {

                                   SPQuery qry = new SPQuery();

                                   qry.Query =

                                   string.Format(@"<Where>

                                 <Eq>

                                    <FieldRef Name='LinkFilename' />

                                    <Value Type='Computed'>{0}</Value>

                                </Eq>

                               </Where>", ItemName);

                                   qry.ViewFields = @"<FieldRef Name='FileRef' />";

                                   qry.RowLimit = 1;

                                   SPListItemCollection listItems = spList.GetItems(qry);

                                   if (listItems.Count > 0)

                                   {

                                       SPListItem item = listItems[0];

                                       file = item.File;

                                   }

                               }

                           }

                       }

                   });

            }

            catch (Exception ex)

            {

                ULSLogService.DisplayError(this.GetType().Name + "." + MethodBase.GetCurrentMethod().Name, ex);

            }

            return file;

        }

        #endregion