using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using OfficeOpenXml;

using System.IO;

using EPPlus.Html;

namespace testepplus

{

    public partial class Default : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            string zpath = Server.MapPath("/") + "test1.xlsx";

            FileInfo zfile = new FileInfo(zpath);

            using (ExcelPackage excel = new ExcelPackage(zfile,"123"))

            {

                //excel.SaveAs(new FileInfo(Server.MapPath("/") + "test1.xlsx"), "123");

                Response.Write(EPPlus.Html.EPPlusExtensions.ToHtml(excel.Workbook.Worksheets[3]));

            }

        }

    }

}

using EPPlus.Html.Converters;

using EPPlus.Html.Html;

using OfficeOpenXml;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.IO;

using System.Drawing;

namespace EPPlus.Html

{

    public static class EPPlusExtensions

    {

        public static string ToHtml(this ExcelWorksheet sheet)

        {

            int lastRow = sheet.Dimension.Rows;

            int lastCol = sheet.Dimension.Columns;

            HtmlElement htmlTable = new HtmlElement("table");

            htmlTable.Attributes["cellspacing"] = 0;

            htmlTable.Styles["white-space"] = "nowrap";

            //render rows

            for (int row = 1; row <= lastRow; row++)

            {

                ExcelRow excelRow = sheet.Row(row);

                var test = excelRow.Style;

                HtmlElement htmlRow = htmlTable.AddChild("tr");

                htmlRow.Styles.Update(excelRow.ToCss());

                for (int col = 1; col <= lastCol; col++)

                {

                    ExcelRange excelCell = sheet.Cells[row, col];

                    HtmlElement htmlCell = htmlRow.AddChild("td");

                    string cc = getPictureCode(row, col, sheet);

                    if (cc == "")

                    {

                        htmlCell.Content = excelCell.Text;

                    }

                    else

                    {

                        htmlCell.Content = cc;

                    }

                    htmlCell.Styles.Update(excelCell.ToCss());

                }

            }

            return htmlTable.ToString();

        }

        public static string getPictureCode(int row ,int col , ExcelWorksheet sheet)

        {

            foreach (OfficeOpenXml.Drawing.ExcelDrawing excelDrawing in sheet.Drawings)

            {

                OfficeOpenXml.Drawing.ExcelPicture excelPicture = excelDrawing as OfficeOpenXml.Drawing.ExcelPicture;

                if (excelPicture.From.Column+1==col && excelPicture.From.Row+1 == row){

                    return "<img src = \"data:image/jpeg;base64,"  + ImgToBase64String(excelPicture.Image) + "\"/>";

                }

            }

            return "";

        }

        public static CssInlineStyles ToCSS(this ExcelStyles styles)

        {

            throw new NotImplementedException();

        }

        public static string ImgToBase64String(Image image)

        {

            MemoryStream ms = new MemoryStream();

            try

            {

                image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);

                byte[] arr = new byte[ms.Length];

                ms.Position = 0;

                ms.Read(arr, 0, (int)ms.Length);

                return Convert.ToBase64String(arr);

            }

            catch (Exception ex)

            {

                return "";

            }

            finally

            {

                ms.Close();

            }

        }

    }

}