229 lines
8.5 KiB
C#
229 lines
8.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Data;
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using System.IO;
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using System.Linq;
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using System.Web;
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using NPOI.XSSF.UserModel;
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using NPOI.HSSF.UserModel;
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using NPOI.HPSF;
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using NPOI.POIFS.FileSystem;
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using NPOI.SS.UserModel;
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namespace SuperMap.RealEstate.Seller.Common
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{
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public class ExcelHelper
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{
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private string fileName = null; //文件名
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private IWorkbook workbook = null;
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private FileStream fs = null;
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private bool disposed;
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public ExcelHelper(string fileName)
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{
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this.fileName = fileName;
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disposed = false;
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}
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public int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten)
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{
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int i = 0;
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int j = 0;
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int count = 0;
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ISheet sheet = null;
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fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
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if (fileName.IndexOf(".xlsx") > 0) // 2007版本
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workbook = new XSSFWorkbook();
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else if (fileName.IndexOf(".xls") > 0) // 2003版本
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workbook = new HSSFWorkbook();
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try
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{
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if (workbook != null)
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{
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sheet = workbook.CreateSheet(sheetName);
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}
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else
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{
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return -1;
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}
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if (isColumnWritten == true) //写入DataTable的列名
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{
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IRow row = sheet.CreateRow(0);
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for (j = 0; j < data.Columns.Count; ++j)
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{
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row.CreateCell(j).SetCellValue(data.Columns[j].ColumnName);
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}
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count = 1;
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}
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else
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{
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count = 0;
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}
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for (i = 0; i < data.Rows.Count; ++i)
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{
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IRow row = sheet.CreateRow(count);
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for (j = 0; j < data.Columns.Count; ++j)
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{
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row.CreateCell(j).SetCellValue(data.Rows[i][j].ToString());
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}
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++count;
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}
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//workbook.Write(fs); //写入到excel,但这种直接写路径不是 下载那个位置，是虚拟目录上
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// 写入到客户端
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System.IO.MemoryStream ms = new System.IO.MemoryStream();
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workbook.Write(ms);
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HttpContext.Current.Response.Clear();
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HttpContext.Current.Response.Buffer = true;
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HttpContext.Current.Response.Charset = "utf-8";
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HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");//设置输出流为简体中文
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HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment; filename=" + "年度利率表.xlsx", DateTime.Now.ToString("yyyyMMddHHmmssfff")));
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HttpContext.Current.Response.BinaryWrite(ms.ToArray());
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HttpContext.Current.Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。
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HttpContext.Current.Response.End();
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workbook = null;
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ms.Close();
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ms.Dispose();
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return count;
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}
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catch (Exception ex)
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{
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Console.WriteLine("Exception: " + ex.Message);
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return -1;
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}
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}
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public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn)
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{
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ISheet sheet = null;
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DataTable data = new DataTable();
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int startRow = 0;
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try
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{
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fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
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//if (fileName.IndexOf(".xlsx") > 0) // 2007版本
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// workbook = new XSSFWorkbook(fs);
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//else if (fileName.IndexOf(".xls") > 0) // 2003版本
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// workbook = new HSSFWorkbook(fs);
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try
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{
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workbook = new XSSFWorkbook(fs);
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}
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catch
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{
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workbook = new HSSFWorkbook(fs);
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}
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if (sheetName != null)
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{
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sheet = workbook.GetSheet(sheetName);
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if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
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{
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sheet = workbook.GetSheetAt(0);
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}
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}
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else
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{
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sheet = workbook.GetSheetAt(0);
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}
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if (sheet != null)
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{
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IRow firstRow = sheet.GetRow(0);
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int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数
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if (isFirstRowColumn)
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{
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for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
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{
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ICell cell = firstRow.GetCell(i);
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if (cell != null)
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{
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string cellValue = cell.StringCellValue;
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if (cellValue != null)
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{
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DataColumn column = new DataColumn(cellValue);
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data.Columns.Add(column);
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}
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}
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}
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startRow = sheet.FirstRowNum + 1;
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}
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else
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{
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startRow = sheet.FirstRowNum;
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}
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//最后一列的标号
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int rowCount = sheet.LastRowNum;
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for (int i = startRow; i <= rowCount; ++i)
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{
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IRow row = sheet.GetRow(i);
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if (row == null) continue; //没有数据的行默认是null
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DataRow dataRow = data.NewRow();
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for (int j = row.FirstCellNum; j < cellCount; ++j)
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{
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if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
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dataRow[j] = row.GetCell(j).ToString();
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}
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data.Rows.Add(dataRow);
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}
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}
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return data;
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}
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catch (Exception ex)
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{
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throw ex;
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}
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}
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public void ExcelExport(string sheetName, bool isFirstRowColumn)
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{
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try
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{
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fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
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if (fileName.IndexOf(".xlsx") > 0) // 2007版本
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workbook = new XSSFWorkbook(fs);
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else if (fileName.IndexOf(".xls") > 0) // 2003版本
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workbook = new HSSFWorkbook(fs);
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// 写入到客户端
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System.IO.MemoryStream ms = new System.IO.MemoryStream();
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workbook.Write(ms);
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string downloadName = "商品导入模板表格.xls";
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HttpContext.Current.Response.Clear();
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HttpContext.Current.Response.Buffer = true;
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HttpContext.Current.Response.Charset = "gb2312";
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HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");//设置输出流为简体中文
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if (HttpContext.Current.Request.Browser.Browser == "IE")
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downloadName = HttpUtility.UrlPathEncode(downloadName);
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string headerValue = string.Format("attachment; filename=\"{0}\"", downloadName);
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HttpContext.Current.Response.AddHeader("Content-Disposition", headerValue);
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HttpContext.Current.Response.ContentType = "application/octet-stream";//设置输出文件类型为excel文件。
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HttpContext.Current.Response.BinaryWrite(ms.ToArray());
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HttpContext.Current.Response.End();
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workbook = null;
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ms.Close();
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ms.Dispose();
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}
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catch (Exception ex)
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{
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throw ex;
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}
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}
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}
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} |