Asp.net gridview images to excel

I want to export my gridview to excel using c# when i am exporting with Microsoft.office.intreop then in my image column System.Drawing.image is coming or when i have done with Response.Header then my images are coming but if image size is more than my image is coming out of row.

<pre>   protected void Unnamed_Click(object sender, EventArgs e)
        {
            System.Data.DataTable dts = new System.Data.DataTable();
            dts.Columns.Add("UserId", typeof(Int32));
            dts.Columns.Add("UserName", typeof(string));
            dts.Columns.Add("Education", typeof(string));
            dts.Columns.Add("Imagepath", typeof(Image));
          //  context.Response.BinaryWrite((Byte[])[ismg.]);
            dts.Rows.Add(1, "Suresh Dasari", "B.Tech", GetImageFromFile("~/images/EC.png"));
            dts.Rows.Add(2, "Suresh Dasarsi", "B.Tech", GetImageFromFile("~/images/EC.png"));
            Microsoft.Office.Interop.Excel._Application excel = new Microsoft.Office.Interop.Excel.Application();
            Microsoft.Office.Interop.Excel._Workbook workbook = excel.Workbooks.Add(Type.Missing);
            Microsoft.Office.Interop.Excel._Worksheet worksheet = null;

            try
            {
                worksheet = workbook.ActiveSheet;

                worksheet.Name = "ExportedFromDatGrid";

                int cellRowIndex = 1;
                int cellColumnIndex = 1;
                ////Loop through each row and read value from each column. 
                for (int i = 0; i < dts.Rows.Count; i++)
                {
                    for (int j = 0; j < dts.Columns.Count; j++)
                    {
                        //// Excel index starts from 1,1. As first Row would have the Column headers, adding a condition check. 
                        if (cellRowIndex == 1)
                        {
                            worksheet.Cells[cellRowIndex, cellColumnIndex] =dts.Columns[j].ColumnName;
                            worksheet.Cells[cellRowIndex, cellColumnIndex].Font.FontStyle = FontStyle.Bold;
                        }
                        else
                        {
                            worksheet.Cells[cellRowIndex, cellColumnIndex] =dts.Rows[i][j].ToString();
                        }

                        cellColumnIndex++;
                    }

                    cellColumnIndex = 1;
                    cellRowIndex++;
                }

                worksheet.Columns.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignLeft;
                worksheet.Columns.AutoFit();

                ////Getting the location and file name of the excel to save from user. 
                workbook.SaveAs("ss.xls", XlFileFormat.xlExcel12, System.Reflection.Missing.Value, System.Reflection.Missing.Value, false, false, XlSaveAsAccessMode.xlShared, XlSaveConflictResolution.xlLocalSessionChanges, false, System.Reflection.Missing.Value, System.Reflection.Missing.Value, false);
            }
            catch (System.Exception ex)
            {
               // MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1);
            }
            finally
            {
                excel.Quit();
                workbook = null;
                excel = null;
            }
        }

 private static Image GetImageFromFile(string fileName)
        {
            string path = fileName;
            //check the existence of the file in disc
            if (File.Exists(path))
            {
                Image image =new  Image();
                image.Url = path;
                return image;
            }
            else
                return null;
        }