New Post: Unable to apply Cell Style When Creation Multiple Sheet

I have successfully created a workbook with one sheet however while creatin one more sheet into the workbook after a point i am unable to add cell style to sheet . Please help please find the code below. The oldversion excel and new version excel write 2 data set into a sheet with formating. Frist sheet is created as required . The problem comes when i try to append the workbook and add another sheet. the second sheet is generated with partial cell styles . like blue and red colors are lost and some of the cells loose border formatting.


using System;
using System.Collections.Generic;
using System.Data;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;

namespace VersionReportGen.DataComp
{

class GenerateReport
{
    public static HSSFWorkbook NewVersionExcel(VersionCompTable newtbleTable, VersionCompTable oldtbleTable, HSSFWorkbook workbook)
    {
        ISheet sheet1 = workbook.CreateSheet(newtbleTable.FormName);
        sheet1.DisplayGridlines = false;
        int j = 0;
        sheet1.CreateRow(3);
        ICellStyle style2 = workbook.CreateCellStyle();
        style2.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.GREY_25_PERCENT.index;
        style2.FillPattern = FillPatternType.SOLID_FOREGROUND;
        style2.BorderBottom = style2.BorderLeft = style2.BorderRight = style2.BorderTop = BorderStyle.THIN;
        foreach (DataColumn dc in newtbleTable.UniqueTable.Columns)
        {
            if (j != 0)
            {
                sheet1.GetRow(3).CreateCell(j).CellStyle = style2;
                sheet1.GetRow(3).GetCell(j).SetCellValue(dc.ColumnName.ToString(CultureInfo.InvariantCulture));
                j++;
            }
            else j++;
        }


        for (int i = 0; i < newtbleTable.UniqueTable.Rows.Count; i++)
        {
            sheet1.CreateRow(i + 4);
            for (int k = 1; k < newtbleTable.UniqueTable.Columns.Count; k++)
            {
                if (newtbleTable.CommonValueComparison.Rows[i][k].ToString() != "E")
                {
                    ICellStyle style1 = workbook.CreateCellStyle();
                    style1.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.WHITE.index;
                    style1.FillPattern = FillPatternType.SOLID_FOREGROUND;
                    style1.BorderBottom =
                        style1.BorderLeft = style1.BorderRight = style1.BorderTop = BorderStyle.THIN;
                    sheet1.GetRow(i + 4).CreateCell(k).SetCellValue(newtbleTable.UniqueTable.Rows[i][k].ToString());
                    sheet1.GetRow(i + 4).GetCell(k).CellStyle = style1;
                }
                else
                {
                    ICellStyle style1 = workbook.CreateCellStyle();
                    style1.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.YELLOW.index;
                    style1.FillPattern = FillPatternType.SOLID_FOREGROUND;
                    style1.BorderBottom =
                        style1.BorderLeft = style1.BorderRight = style1.BorderTop = BorderStyle.THIN;
                    sheet1.GetRow(i + 4).CreateCell(k).SetCellValue(newtbleTable.UniqueTable.Rows[i][k].ToString());
                    sheet1.GetRow(i + 4).GetCell(k).CellStyle = style1;
                }
            }
            //row.CreateCell();

        }
        for (int i = 0; i < newtbleTable.ColumnList.Rows.Count; i++)
        {
            sheet1.CreateRow(i + newtbleTable.UniqueTable.Rows.Count + 4);
            ICellStyle style1 = workbook.CreateCellStyle();
            style1.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.LIGHT_GREEN.index;
            style1.FillPattern = FillPatternType.SOLID_FOREGROUND;

            for (int k = 1; k < newtbleTable.ColumnList.Columns.Count; k++)
            {
                style1.BorderBottom =
                       style1.BorderLeft = style1.BorderRight = style1.BorderTop = BorderStyle.THIN;
                sheet1.GetRow(i + newtbleTable.UniqueTable.Rows.Count + 4).CreateCell(k).CellStyle = style1;



                sheet1.GetRow(i + newtbleTable.UniqueTable.Rows.Count + 4).GetCell(k).SetCellValue(newtbleTable.ColumnList.Rows[i][k].ToString());

            }

        }

        //freez

        workbook.GetSheet(newtbleTable.FormName).CreateFreezePane(newtbleTable.UniqueTable.Columns.Count + 2, 0, newtbleTable.UniqueTable.Columns.Count + 2, 0);
        int totalcount = (oldtbleTable.UniqueTable.Rows.Count + oldtbleTable.ColumnList.Rows.Count) -
                         newtbleTable.UniqueTable.Rows.Count + newtbleTable.ColumnList.Rows.Count;

        if (totalcount > 0)
        {
            for (int i = 0; i <= totalcount; i++)
            {
                sheet1.CreateRow(newtbleTable.UniqueTable.Rows.Count + newtbleTable.ColumnList.Rows.Count + 4 + i);
            }
        }


        OldVersionExcel(oldtbleTable, workbook, newtbleTable.UniqueTable.Columns.Count + 4, newtbleTable.FormName);
        return workbook;
        //FileStream file = new FileStream ( "D:\\test.xls" , FileMode.Create );
        //workbook.Write ( file );
        //file.Close ( );
    }

    private static void OldVersionExcel(VersionCompTable oldtbleTable, HSSFWorkbook workbook, int width, string formName)
    {
        //workbook = new HSSFWorkbook ( );
        ISheet sheet1 = workbook.GetSheet(formName);
        int j = 0;
        sheet1.GetRow(3);
        ICellStyle style2 = workbook.CreateCellStyle();
        style2.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.GREY_25_PERCENT.index;
        style2.FillPattern = FillPatternType.SOLID_FOREGROUND;
        style2.BorderBottom =
                    style2.BorderLeft = style2.BorderRight = style2.BorderTop = BorderStyle.THIN;
        foreach (DataColumn dc in oldtbleTable.UniqueTable.Columns)
        {
            if (j != 0)
            {
                sheet1.GetRow(3).CreateCell(j + width).CellStyle = style2;
                sheet1.GetRow(3)
                    .GetCell(j + width)
                    .SetCellValue(dc.ColumnName.ToString(CultureInfo.InvariantCulture));
                j++;
            }
            else
            {
                j++;
            }
        }



        for (int i = 0; i < oldtbleTable.UniqueTable.Rows.Count; i++)
        {
            sheet1.GetRow(i + 4);
            for (int k = 1; k < oldtbleTable.UniqueTable.Columns.Count; k++)
            {
                ICellStyle cellStyle = workbook.CreateCellStyle();

                cellStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.BLUE.index;
                cellStyle.FillPattern = FillPatternType.SOLID_FOREGROUND;
                cellStyle.BorderBottom =
                            cellStyle.BorderLeft = cellStyle.BorderRight = cellStyle.BorderTop = BorderStyle.THIN;
                sheet1.GetRow(i + 4).CreateCell(k + width).SetCellValue(oldtbleTable.UniqueTable.Rows[i][k].ToString());
                sheet1.GetRow(i + 4).GetCell(k + width).CellStyle = cellStyle;
            }
            //row.CreateCell();

        }
        for (int i = 0; i < oldtbleTable.ColumnList.Rows.Count; i++)
        {
            sheet1.GetRow(i + oldtbleTable.UniqueTable.Rows.Count + 4);
            ICellStyle cellStyle = workbook.CreateCellStyle();

            cellStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.RED.index;
            cellStyle.FillPattern = FillPatternType.SOLID_FOREGROUND;
            cellStyle.BorderBottom =
                        cellStyle.BorderLeft = cellStyle.BorderRight = cellStyle.BorderTop = BorderStyle.THIN;
            for (int k = 1; k < oldtbleTable.ColumnList.Columns.Count; k++)
            {
                sheet1.GetRow(i + oldtbleTable.UniqueTable.Rows.Count + 4).CreateCell(k + width).CellStyle = cellStyle;
                sheet1.GetRow(i + oldtbleTable.UniqueTable.Rows.Count + 4).GetCell(k + width).SetCellValue(oldtbleTable.ColumnList.Rows[i][k].ToString());

            }

        }
    }
}

}