C# Document.RenderToScale方法代码示例

        public void createThumbnails()
        {
            //ExStart
            //ExFor:Document.RenderToScale
            //ExSummary:Renders individual pages to graphics to create one image with thumbnails of all pages.

            // The user opens or builds a document.
            Aspose.Words.Document doc = new Aspose.Words.Document(ExDir + "Rendering.doc");

            // This defines the number of columns to display the thumbnails in.
            const int thumbColumns = 2;

            // Calculate the required number of rows for thumbnails.
            // We can now get the number of pages in the document.
            int remainder;
            int thumbRows = Math.DivRem(doc.PageCount, thumbColumns, out remainder);
            if (remainder > 0)
                thumbRows++;

            // Lets say I want thumbnails to be of this zoom.
            const float scale = 0.25f;

            // For simplicity lets pretend all pages in the document are of the same size,
            // so we can use the size of the first page to calculate the size of the thumbnail.
            Size thumbSize = doc.GetPageInfo(0).GetSizeInPixels(scale, 96);

            // Calculate the size of the image that will contain all the thumbnails.
            int imgWidth = thumbSize.Width * thumbColumns;
            int imgHeight = thumbSize.Height * thumbRows;

            using (Bitmap img = new Bitmap(imgWidth, imgHeight))
            {
                // The user has to provides a Graphics object to draw on.
                // The Graphics object can be created from a bitmap, from a metafile, printer or window.
                using (Graphics gr = Graphics.FromImage(img))
                {
                    gr.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;

                    // Fill the "paper" with white, otherwise it will be transparent.
                    gr.FillRectangle(new SolidBrush(Color.White), 0, 0, imgWidth, imgHeight);

                    for (int pageIndex = 0; pageIndex < doc.PageCount; pageIndex++)
                    {
                        int columnIdx;
                        int rowIdx = Math.DivRem(pageIndex, thumbColumns, out columnIdx);

                        // Specify where we want the thumbnail to appear.
                        float thumbLeft = columnIdx * thumbSize.Width;
                        float thumbTop = rowIdx * thumbSize.Height;

                        SizeF size = doc.RenderToScale(pageIndex, gr, thumbLeft, thumbTop, scale);

                        // Draw the page rectangle.
                        gr.DrawRectangle(Pens.Black, thumbLeft, thumbTop, size.Width, size.Height);
                    }

                    img.Save(ExDir + "Rendering.Thumbnails Out.png");
                }
            }
            //ExEnd
        }

        public void RenderToScale()
        {
            //ExStart
            //ExFor:Document.RenderToScale
            //ExFor:Document.GetPageInfo
            //ExFor:PageInfo
            //ExFor:PageInfo.GetSizeInPixels
            //ExSummary:Renders a page of a Word document into a bitmap using a specified zoom factor.
            Aspose.Words.Document doc = new Aspose.Words.Document(ExDir + "Rendering.doc");

            PageInfo pageInfo = doc.GetPageInfo(0);

            // Let's say we want the image at 50% zoom.
            const float MyScale = 0.50f;

            // Let's say we want the image at this resolution.
            const float MyResolution = 200.0f;

            Size pageSize = pageInfo.GetSizeInPixels(MyScale, MyResolution);

            using (Bitmap img = new Bitmap(pageSize.Width, pageSize.Height))
            {
                img.SetResolution(MyResolution, MyResolution);

                using (Graphics gr = Graphics.FromImage(img))
                {
                    // You can apply various settings to the Graphics object.
                    gr.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;

                    // Fill the page background.
                    gr.FillRectangle(Brushes.White, 0, 0, pageSize.Width, pageSize.Height);

                    // Render the page using the zoom.
                    doc.RenderToScale(0, gr, 0, 0, MyScale);
                }

                img.Save(ExDir + "Rendering.RenderToScale Out.png");
            }
            //ExEnd
        }