using System;
using System.Web;
using System.Data;
using System.Configuration;
using System.IO;
using Test_DBUtility;
using NPOI;
using NPOI.SS.UserModel;
using NPOI.HSSF.UserModel;public partial class Handlers_ExportExcel : System.Web.UI.Page
{protected void Page_Load(object sender, EventArgs e){if (!IsPostBack){string act = Request["action"].ToString();DataTable dt = new DataTable();string sql = string.Empty;int[] array = new int[] { };switch (act){case "export":sql = @"select M_MEDIUM 产品图片,PN,CN_NAME 产品名称,EN_NAME 英文名称,DESC_CN 中文描述,DESC_EN 英文描述,REMARKS 备注描述,MANUFACTURER_PN 厂家编码,PROVIDER_FULL_NAME 供应商,SP_RESULT 审批结果," +"RANK 产品定级,BASE_STOCK 基础库存,COST 实际成本,CURRENT_PRICE 现价,SPECIAL_PRICE 特价 from viewsdb_en.dbo.View_ProductExcelExport";dt = SqlHelper.Query(sql).Tables[0];array = new int[] { 20, 15, 20, 20, 80, 80, 80, 20, 40, 10, 10, 10, 12, 12, 12 }; //定义列宽NpoiExcel(dt, "操作表", array);break;}}}/// <summary>/// NPOI导出EXCEL/// </summary>/// <param name="dt">数据源</param>/// <param name="title">导出文件的名称</param>/// <param name="array">列宽数组</param>public void NpoiExcel(DataTable dt, string title, int[] array){NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();NPOI.SS.UserModel.ISheet sheet = book.CreateSheet("Sheet1");NPOI.SS.UserModel.IRow headerrow = sheet.CreateRow(0);headerrow.Height = 30 * 20;ICellStyle style = book.CreateCellStyle();style.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;style.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;style.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;style.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;style.WrapText = true;style.Alignment = HorizontalAlignment.Center;style.VerticalAlignment = VerticalAlignment.Center;/*标题*/for (int i = 0; i < dt.Columns.Count; i++){ICell cell = headerrow.CreateCell(i);cell.CellStyle = style;cell.SetCellValue(dt.Columns[i].ColumnName);/*设置列宽*/if (array.Length > 0){for (int c = 0; c < array.Length; c++){sheet.SetColumnWidth(c, array[c] * 256);}}}/*内容*/for (int j = 1; j <= dt.Rows.Count; j++){NPOI.SS.UserModel.IRow contentrow = sheet.CreateRow(j);contentrow.Height = 100 * 20;for (int k = 0; k < dt.Columns.Count; k++){ICell cell = contentrow.CreateCell(k);cell.CellStyle = style;if (k == 0){string picurl = dt.Rows[j - 1][k].ToString();AddCellPicture(sheet, book, picurl, j, k);}else{cell.CellStyle = style;cell.SetCellValue(dt.Rows[j - 1][k].ToString());}}}MemoryStream ms = new MemoryStream();book.Write(ms);Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xls", HttpUtility.UrlEncode(title + "_" + DateTime.Now.ToString("yyyy-MM-dd"), System.Text.Encoding.UTF8)));Response.BinaryWrite(ms.ToArray());Response.End();book = null;ms.Close();ms.Dispose();}/// <summary>/// 向sheet插入图片/// </summary>/// <param name="sheet"></param>/// <param name="workbook"></param>/// <param name="fileurl"></param>/// <param name="row"></param>/// <param name="col"></param>private void AddCellPicture(ISheet sheet, HSSFWorkbook workbook, string fileurl, int row, int col){try{//由于File类只能读取本地资源，所以在配置文件中配置了物理路径的前半部分string DiscPath = ConfigurationManager.AppSettings["PictureDiscPath"];string FileName = DiscPath.Replace("\\", "/") + fileurl.Replace("http://www.bolioptics.com/", "");if (File.Exists(FileName) == true){byte[] bytes = System.IO.File.ReadAllBytes(FileName);if (!string.IsNullOrEmpty(FileName)){int pictureIdx = workbook.AddPicture(bytes, NPOI.SS.UserModel.PictureType.JPEG);HSSFPatriarch patriarch = (HSSFPatriarch)sheet.CreateDrawingPatriarch();HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 0, 0, col, row, col + 1, row + 1);HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);}}}catch (Exception ex){throw ex;}}
}