public class StoreDataSetPaginator : DocumentPaginator

    {

        private DataTable dt;

        // Could be wrapped with public properties that call PaginateData() when set.

        private Typeface typeface;

        private double fontSize;

        private double margin;

        public StoreDataSetPaginator(DataTable dt, Typeface typeface, double fontSize, double margin, Size pageSize)

        {

            this.dt = dt;

            this.typeface = typeface;

            this.fontSize = fontSize;

            this.margin = margin;

            this.pageSize = pageSize;

            PaginateData();

        }

        public override bool IsPageCountValid

        {

            get { return true; }

        }

        private int pageCount;

        public override int PageCount

        {

            get { return pageCount; }

        }

        private Size pageSize;

        public override Size PageSize

        {

            get

            {

                return pageSize;

            }

            set

            {

                pageSize = value;

                PaginateData();

            }

        }

        public override IDocumentPaginatorSource Source

        {

            get { return null; }

        }

        // This helper method splits the data into pages.

        // In some cases you'll need to store objects representing the per-page data.

        // Here, a rowsPerPage value is enough becuase every page is the same.

        private int rowsPerPage;

        /// <summary>

        /// 计算页数

        /// </summary>

        private void PaginateData()

        {

            // Create a test string for the purposes of measurement.

            FormattedText text = GetFormattedText("A");

            // Count the lines that fit on a page.

            rowsPerPage = (int)((pageSize.Height - margin * ) / text.Height);

            // Leave a row for the headings

            rowsPerPage -= ;

            pageCount = (int)Math.Ceiling((double)dt.Rows.Count / rowsPerPage);

        }

        public override DocumentPage GetPage(int pageNumber)

        {

            // Create a test string for the purposes of measurement.

            FormattedText text = GetFormattedText("A");

            // Size columns relative to the width of one "A" letter.

            // It's a shortcut that works in this example.

            double col1_X = margin;

            double col2_X = col1_X + text.Width * ;

            // Calculate the range of rows that fits on this page.

            int minRow = pageNumber * rowsPerPage;

            int maxRow = minRow + rowsPerPage;

            // Create the visual for the page.

            DrawingVisual visual = new DrawingVisual();

            // Initially, set the position to the top-left corner of the printable area.

            Point point = new Point(margin, margin);

            // Print the column values.

            using (DrawingContext dc = visual.RenderOpen())

            {

                // Draw the column headers.

                Typeface columnHeaderTypeface = new Typeface(typeface.FontFamily, FontStyles.Normal, FontWeights.Bold, FontStretches.Normal);

                point.X = col1_X;

                text = GetFormattedText("Model Number", columnHeaderTypeface);

                dc.DrawText(text, point);

                text = GetFormattedText("Model Name", columnHeaderTypeface);

                point.X = col2_X;

                dc.DrawText(text, point);

                // Draw the line underneath.

                dc.DrawLine(new Pen(Brushes.Black, ),

                    new Point(margin, margin + text.Height),

                    new Point(pageSize.Width - margin, margin + text.Height));

                point.Y += text.Height;

                // Draw the column values.

                for (int i = minRow; i < maxRow; i++)

                {

                    // Check for the end of the last (half-filled) page.

                    if (i > (dt.Rows.Count - )) break;

                    point.X = col1_X;

                    text = GetFormattedText(dt.Rows[i]["ModelNumber"].ToString());

                    dc.DrawText(text, point);

                    // Add second column.

                    text = GetFormattedText(dt.Rows[i]["ModelName"].ToString());

                    point.X = col2_X;

                    dc.DrawText(text, point);

                    point.Y += text.Height;

                }

            }

            return new DocumentPage(visual, pageSize, new Rect(pageSize), new Rect(pageSize));

        }

        private FormattedText GetFormattedText(string text)

        {

            return GetFormattedText(text, typeface);

        }

        private FormattedText GetFormattedText(string text, Typeface typeface)

        {

            return new FormattedText(

                text, CultureInfo.CurrentCulture, FlowDirection.LeftToRight,

                        typeface, fontSize, Brushes.Black);

        }

    }