public ImageData(OpenXmlPart contentPart, ImagePart part)
 {
     ContentType = part.ContentType;
     ContentPart = contentPart;
     using (Stream s = part.GetStream(FileMode.Open, FileAccess.Read))
     {
         Image = new byte[s.Length];
         s.Read(Image, 0, (int)s.Length);
     }
 }

 public static XLPictureType ConvertBack(ImagePart imagePart)
 {
     switch (imagePart.ContentType)
     {
         case "image/bmp": return XLPictureType.Bmp;
         case "image/gif": return XLPictureType.Gif;
         case "image/png": return XLPictureType.Png;
         case "image/jpeg": return XLPictureType.Jpeg;
         case "image/tif": return XLPictureType.Tiff;
         default:
             throw new ArgumentException("not-supported content-type: " + imagePart.ContentType);
     }
 }

 public void WriteImage(ImagePart part)
 {
     using (Stream s = part.GetStream(FileMode.Create, FileAccess.ReadWrite))
         s.Write(Image, 0, Image.GetUpperBound(0) + 1);
 }

 // General function for handling images that tries to use an existing image if they are the same
 private static ImageData ManageImageCopy(ImagePart oldImage, OpenXmlPart newContentPart, List<ImageData> images)
 {
     ImageData oldImageData = new ImageData(newContentPart, oldImage);
     foreach (ImageData item in images)
     {
         if (newContentPart != item.ContentPart)
             continue;
         if (item.Compare(oldImageData))
             return item;
     }
     images.Add(oldImageData);
     return oldImageData;
 }

 public ImageData(ImagePart part)
 {
     m_ContentType = part.ContentType;
     using (Stream s = part.GetStream(FileMode.Open, FileAccess.Read))
     {
         m_Image = new byte[s.Length];
         s.Read(m_Image, 0, (int)s.Length);
     }
 }

 // General function for handling images that tries to use an existing image if they are the same
 private static ImageData ManageImageCopy(ImagePart oldImage, List<ImageData> images)
 {
     ImageData oldImageData = new ImageData(oldImage);
     foreach (ImageData item in images)
     {
         if (item.Compare(oldImageData))
             return item;
     }
     images.Add(oldImageData);
     return oldImageData;
 }

 /// <summary>
 /// Adds a ImagePart to the WorksheetPart.
 /// </summary>
 /// <param name="contentType">the content type of the ImagePart.</param>
 /// <param name="id">The relationship id.</param>
 /// <returns>The newly added part.</returns>
 public ImagePart AddImagePart(string contentType, string id)
 {
     ImagePart childPart = new ImagePart();
     this.InitPart(childPart, contentType, id);
     return childPart;
 }

        /// <summary>
        /// Create an instance of OpenXmlPart according to the given relationship type.
        /// </summary>
        /// <param name="openXmlPackage">The container OpenXmlPackage.</param>
        /// <param name="relationshipType">The relationship type of the target part.</param>
        /// <param name="openXmlPart">The created instance of OpenXmlPart.</param>
        /// <remarks>This partial method will be generated by code generaotr.</remarks>
        static partial void CreatePartCore(OpenXmlPackage openXmlPackage, string relationshipType, ref OpenXmlPart openXmlPart)
        {
            if (openXmlPackage == null)
            {
				throw new ArgumentNullException("openXmlPackage");
            }
            if (relationshipType == null)
            {
                throw new ArgumentNullException("relationshipType");
            }
            
            if (openXmlPackage is WordprocessingDocument)
            {
                switch (relationshipType)
                {
					case MainDocumentPart.RelationshipTypeConstant:
	openXmlPart = new MainDocumentPart();
	return;
case CustomXmlPart.RelationshipTypeConstant:
	openXmlPart = new CustomXmlPart();
	return;
case CustomXmlPropertiesPart.RelationshipTypeConstant:
	openXmlPart = new CustomXmlPropertiesPart();
	return;
case GlossaryDocumentPart.RelationshipTypeConstant:
	openXmlPart = new GlossaryDocumentPart();
	return;
case WordprocessingCommentsPart.RelationshipTypeConstant:
	openXmlPart = new WordprocessingCommentsPart();
	return;
case AlternativeFormatImportPart.RelationshipTypeConstant:
	openXmlPart = new AlternativeFormatImportPart();
	return;
case ChartPart.RelationshipTypeConstant:
	openXmlPart = new ChartPart();
	return;
case ChartDrawingPart.RelationshipTypeConstant:
	openXmlPart = new ChartDrawingPart();
	return;
case ImagePart.RelationshipTypeConstant:
	openXmlPart = new ImagePart();
	return;
case EmbeddedPackagePart.RelationshipTypeConstant:
	openXmlPart = new EmbeddedPackagePart();
	return;
case ThemeOverridePart.RelationshipTypeConstant:
	openXmlPart = new ThemeOverridePart();
	return;
case ChartStylePart.RelationshipTypeConstant:
	openXmlPart = new ChartStylePart();
	return;
case ChartColorStylePart.RelationshipTypeConstant:
	openXmlPart = new ChartColorStylePart();
	return;
case DiagramColorsPart.RelationshipTypeConstant:
	openXmlPart = new DiagramColorsPart();
	return;
case DiagramDataPart.RelationshipTypeConstant:
	openXmlPart = new DiagramDataPart();
	return;
case SlidePart.RelationshipTypeConstant:
	openXmlPart = new SlidePart();
	return;
case DiagramPersistLayoutPart.RelationshipTypeConstant:
	openXmlPart = new DiagramPersistLayoutPart();
	return;
case DiagramLayoutDefinitionPart.RelationshipTypeConstant:
	openXmlPart = new DiagramLayoutDefinitionPart();
	return;
case DiagramStylePart.RelationshipTypeConstant:
	openXmlPart = new DiagramStylePart();
	return;
case EmbeddedObjectPart.RelationshipTypeConstant:
	openXmlPart = new EmbeddedObjectPart();
	return;
case VmlDrawingPart.RelationshipTypeConstant:
	openXmlPart = new VmlDrawingPart();
	return;
case LegacyDiagramTextPart.RelationshipTypeConstant:
	openXmlPart = new LegacyDiagramTextPart();
	return;
case EmbeddedControlPersistenceBinaryDataPart.RelationshipTypeConstant:
	openXmlPart = new EmbeddedControlPersistenceBinaryDataPart();
	return;
case NotesSlidePart.RelationshipTypeConstant:
	openXmlPart = new NotesSlidePart();
	return;
case NotesMasterPart.RelationshipTypeConstant:
	openXmlPart = new NotesMasterPart();
	return;
case ThemePart.RelationshipTypeConstant:
	openXmlPart = new ThemePart();
	return;
//.........这里部分代码省略.........

 // Generates content of imagePart1.
 private void GenerateImagePart1Content(ImagePart imagePart1)
 {
     System.IO.Stream data = GetBinaryDataStream(imagePart1Data);
     imagePart1.FeedData(data);
     data.Close();
 }

        /// <summary>
        /// Removes pictures in a excel sheet
        /// </summary>
        /// <param name="worksheetPart">WorksheetPart</param>
        private static void RemovePictures(WorksheetPart worksheetPart)
        {
            ImagePart[] imageParts = new ImagePart[worksheetPart.DrawingsPart.ImageParts.Count()];
            worksheetPart.DrawingsPart.ImageParts.ToList().CopyTo(imageParts);
            foreach (var imagePart in imageParts)
            {
                worksheetPart.DrawingsPart.DeletePart(imagePart);
            }

            foreach (var val in worksheetPart.DrawingsPart.WorksheetDrawing.Descendants<ss.Picture>())
            {
                val.Parent.Remove();
            }
        }

 // Generates content of imagePart7.
 private void GenerateImagePartTopicRankContent(ImagePart imagePart, string imageStringData)
 {
     System.IO.Stream data = GetBinaryDataStream(imageStringData);
     imagePart.FeedData(data);
     data.Close();
 }

 // Generates content of imagePart4.
 private void GenerateImagePartOverallEvalContent(ImagePart imagePart, string imagePartData)
 {
     System.IO.Stream data = GetBinaryDataStream(imagePartData);
     imagePart.FeedData(data);
     data.Close();
 }

        /// <summary>
        /// Generates an image icon to display inline for file representation.
        /// </summary>
        /// <param name="imagePart">The area to embed the icon.</param>
        /// <param name="fileName">Text to display below the image.</param>
        private void GenerateImage(ImagePart imagePart, String fileName)
        {
            int width = 1200;
            int height = 800;
            Bitmap bitmap = new Bitmap(width, height);
            bitmap.SetResolution(600.0f, 600.0f);
            using (MemoryStream ms = new MemoryStream())
            {
                System.Drawing.Imaging.ImageFormat format = System.Drawing.Imaging.ImageFormat.Png;
                bitmap.Save(ms, format);
                ms.Position = 0;
                using (Graphics graphics = Graphics.FromImage(bitmap))
                {
                    using (System.Drawing.Font font = new System.Drawing.Font("Arial", 0.3f, FontStyle.Regular, GraphicsUnit.Inch))
                    {
                        graphics.SmoothingMode = SmoothingMode.HighQuality;
                        graphics.TextRenderingHint = TextRenderingHint.SingleBitPerPixelGridFit;

                        int centerx = (width / 4);
                        graphics.DrawIcon(GetIcon(Path.GetExtension(fileName)), new Rectangle(new Point(centerx, 0), new Size((width * 2) / 4, (height * 3) / 4)));

                        StringFormat sf = new StringFormat();
                        sf.Alignment = StringAlignment.Center;
                        graphics.DrawString(fileName, font, new SolidBrush(System.Drawing.Color.Black), new Point(bitmap.Width / 2, bitmap.Height / 2), sf);
                        bitmap.Save(ms, format);
                        ms.Position = 0;
                        imagePart.FeedData(ms);
                    }

                }
            }
        }

 internal void FeedDataImagePart(ImagePart NewPart, ImagePart ExistingPart)
 {
     System.Drawing.Imaging.ImageFormat imgtype = SLTool.TranslateImageContentType(ExistingPart.ContentType);
     using (System.Drawing.Bitmap bm = new System.Drawing.Bitmap(ExistingPart.GetStream()))
     {
         using (MemoryStream ms = new MemoryStream())
         {
             bm.Save(ms, imgtype);
             ms.Position = 0;
             NewPart.FeedData(ms);
         }
     }
 }

 /// <summary>
 /// Gets the relationship ID of a given image part.
 /// </summary>
 /// <param name="imagePart">The image part.</param>
 /// <returns>The relationship ID of the image part.</returns>
 internal string GetIdOfImagePart(ImagePart imagePart)
 {
     return this.slidePart.GetIdOfPart(imagePart);
 }

 internal void SetImagePart(ImagePart part)
 {
     ImagePart = part;
 }