using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;
using NPOI.SS.UserModel;
using NPOI.HSSF.UserModel;
using NPOI.XSSF.UserModel;
using System.Data;
using System.Web;

namespace QMAPP.Web.Common
{
    /// <summary>
    /// Excel操作工具
    /// 创建者：单雨春
    /// 创建日期：2014年9月26日
    /// </summary>
    public partial class ExcelOperationHelper
    {
        #region 获得临时路径
        /// <summary>
        /// 获得临时路径
        /// </summary>
        /// <returns></returns>
        public static string GetTempPath()
        {
            //应用程序物理路径
            var PhysicsRootPath = System.Web.HttpContext.Current.Server.MapPath(System.Web.HttpContext.Current.Request.ApplicationPath);

            //临时文件路径
            var TempPath = PhysicsRootPath + "Temp\\";

            if (System.IO.Directory.Exists(PhysicsRootPath + "Temp") == false)
            {
                System.IO.Directory.CreateDirectory(PhysicsRootPath + "Temp");
            }
            return TempPath;
        }
        #endregion

        #region 将数据生成为excel文件
        /// <summary>
        /// 将数据生成为excel文件
        /// <param name="info">配置信息</param>
        /// <param name="fileName">文件名</param>
        /// </summary>
        public void WriteWorkbook(List<string> listSheetName, string fileName, DataSet ds)
        {
            List<ISheet> listSheet = new List<ISheet>() ;
            //ISheet sheet = null;
            XSSFWorkbook workbook1 = null;
            HSSFWorkbook workbook2 = null;
            try
            {
                if (fileName.IndexOf(".xlsx") > 0)
                {
                    workbook1 = new XSSFWorkbook();
                    foreach (var item in listSheetName)
                    {
                        listSheet.Add(workbook1.CreateSheet(item));
                    }

                }
                else
                {
                    workbook2 = new HSSFWorkbook();
                    foreach (var item in listSheetName)
                    {
                        listSheet.Add(workbook2.CreateSheet(item));
                    }
                }

                //写入文件
                using (FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite))
                {
                    

                    IRow dataRow = null;
                    ICell contentCell = null;

                    int rowsNum = 0;
                    for (int m = 0; m < ds.Tables.Count; m++)
                    {
                        rowsNum = 0;
                        if (ds.Tables[m].Rows.Count == 0)
                        {
                            continue;
                        }

                        ICellStyle headStyle = workbook1 == null ? workbook2.CreateCellStyle() : workbook1.CreateCellStyle();
                        IFont headFont = workbook1 == null ? workbook2.CreateFont() : workbook1.CreateFont();

                        ICellStyle cellStyle = workbook1 == null ? workbook2.CreateCellStyle() : workbook1.CreateCellStyle();
                        IFont cellFont = workbook1 == null ? workbook2.CreateFont() : workbook1.CreateFont();

                        #region 写入表头
                        IRow headRow = listSheet[m].CreateRow(rowsNum++);
                        for (int i = 0; i < ds.Tables[m].Columns.Count; i++)
                        {                            
                            ICell cell = headRow.CreateCell(i);
                            cell.SetCellValue(ds.Tables[m].Rows[0][i].ToString());
                            headStyle.BorderTop = BorderStyle.Thin;
                            headStyle.BorderBottom = BorderStyle.Thin;
                            headStyle.BorderLeft = BorderStyle.Thin;
                            headStyle.BorderRight = BorderStyle.Thin;
                            headFont.Boldweight = (short)FontBoldWeight.Bold;
                            headStyle.SetFont(headFont);
                            cell.CellStyle = headStyle;
                        }

                        #endregion

                        #region 写入行数据
                        for (int j = 1; j < ds.Tables[m].Rows.Count; j++)
                        {
                            dataRow = listSheet[m].CreateRow(rowsNum++);
                            for (int i = 0; i < ds.Tables[m].Columns.Count; i++)
                            {

                                CellType cellType = CellType.Blank;
                                contentCell = dataRow.CreateCell(i, cellType);
                                int a = 0;
                                if (int.TryParse(ds.Tables[m].Rows[j][i].ToString(), out a))
                                {
                                    contentCell.SetCellValue(a);
                                }
                                else
                                {
                                    contentCell.SetCellValue(ds.Tables[m].Rows[j][i].ToString());
                                }

                                cellStyle.BorderTop = BorderStyle.Thin;
                                cellStyle.BorderBottom = BorderStyle.Thin;
                                cellStyle.BorderLeft = BorderStyle.Thin;
                                cellStyle.BorderRight = BorderStyle.Thin;

                                cellStyle.SetFont(cellFont);
                                contentCell.CellStyle = cellStyle;
                            }

                        }
                        #endregion

                        rowsNum++;
                    }

                    if (fileName.IndexOf(".xlsx") > 0)
                    {
                        workbook1.Write(fs);
                    }
                    else
                    {
                        workbook2.Write(fs);
                    }

                    fs.Close();
                }

            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
        #endregion

        /// <summary>
        /// 下载文件
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="fileName"></param>
        public static void FileDownload(HttpResponseBase Response, string filePath, string fileName)
        {
            Response.ClearHeaders();
            Response.Clear();
            Response.Expires = 0;
            Response.Buffer = true;
            Response.AddHeader("Accept-Language", "zh-tw");
            //string name = System.IO.Path.GetFileName(virtualPath + fileName);

            System.IO.FileStream files = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);
            byte[] byteFile = null;
            if (files.Length == 0)
            {
                byteFile = new byte[1];
            }
            else
            {
                byteFile = new byte[files.Length];
            }
            files.Read(byteFile, 0, (int)byteFile.Length);
            files.Close();
            fileName = HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8);
            Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            Response.BinaryWrite(byteFile);
            Response.End();
            FileInfo file = new FileInfo(filePath);
            file.Delete();
        }
    }
}