.Net MVC 导入导出Excel总结(三种导出Excel方法,一种导入Excel方法) 通过MVC控制器导出导入Excel文件(可用于java SSH架构)
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public class ExcelController : Controller { // // GET: /Excel/ Models.zbwxglEntities myMdl = new Models.zbwxglEntities(); /// <summary> /// 第一种方法,利用文件输出流进行读写操作 /// </summary> public void outExcel() { DataTable dtData = (DataTable)Session["datatable"]; string shtnl = ""; shtnl = "<table border=‘1‘ cellspacing=‘1‘ cellpadding=‘1‘>"; shtnl = shtnl + "<thead>"; for (int j = 0; j < dtData.Columns.Count; j++) { shtnl = shtnl + "<th>" + j + "</th>"; } shtnl = shtnl + "</thead><tbody>"; for (int i = 0; i < dtData.Rows.Count; i++) { shtnl = shtnl + "<tr>"; for (int j = 0; j < dtData.Columns.Count; j++) { shtnl = shtnl + "<td>" + dtData.Rows[i][j] + "</td>"; } shtnl = shtnl + "</tr>"; } shtnl = shtnl + "</tbody></table>"; ExportToExcel("application/x-excel", "123.xls", shtnl); } public void ExportToExcel(string FieldType, string FileName, string dt) { System.Web.HttpContext.Current.Response.Charset = "utf-8"; System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8).ToString()); System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312"); System.Web.HttpContext.Current.Response.ContentType = FieldType; StringWriter tw = new StringWriter(); System.Web.HttpContext.Current.Response.Output.Write(dt); System.Web.HttpContext.Current.Response.Flush(); System.Web.HttpContext.Current.Response.End(); } /// <summary> /// 第二种方法,利用微软自带插件 /// </summary> /// <returns></returns> public ActionResult DownloadFile() { try { DataTable dt = (DataTable)Session["datatable"]; string strdate = DateTime.Now.ToString("yyyyMMddhhmmss"); string str = Server.htmlEncode(Request.PhysicalApplicationPath).ToString() + "Content\\DownLoadTest\\" + Session["YongHuID"] + strdate + "Excel.xls"; if (System.IO.File.Exists(str)) { //如果存在则删除 System.IO.File.Delete(str); } ConvertHelper myConvertHelper = new ConvertHelper(); DataTableToExcel(dt, str); System.Threading.Thread.Sleep(5000); return File(str, "application/vnd.ms-excel", strdate + "Excel.xls"); } catch { DataTable dt = new DataTable(); List<Dictionary<string, object>> ListReturn = ConvertHelper.DtToList(dt); return Json(ListReturn, JsonRequestBehavior.AllowGet); } } public void DataTableToExcel(DataTable datas, string p) { Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application(); app.SheetsInNewWorkbook = 1; app.Workbooks.Add(); Microsoft.Office.Interop.Excel.Worksheet sheet = (Microsoft.Office.Interop.Excel.Worksheet)app.ActiveWorkbook.Worksheets[1]; for (int i = 0; i < datas.Columns.Count; i++) { sheet.Cells[1, i + 1] = datas.Columns[i].ColumnName; } for (int i = 0; i < datas.Rows.Count; i++) { for (int j = 0; j < datas.Columns.Count; j++) { sheet.Cells[2 + i, j + 1] = datas.Rows[i][j].ToString(); } } app.Visible = true; System.Threading.Thread.Sleep(500); try { app.ActiveWorkbook.SaveAs(p); } catch { } app.Quit(); } /// <summary> /// 第三种方法,利用NPOI插件 /// </summary> /// <returns></returns> public FileResult DownLoadExcelJiZuChaXunGenRenXiaoFeiJiLu() { DataTable dt = (DataTable)Session["datatable"];//获取需要导出的datatable数据 //创建Excel文件的对象 NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook(); //添加一个sheet NPOI.SS.UserModel.ISheet sheet1 = book.CreateSheet("Sheet1"); //给sheet1添加第一行的头部标题 NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow(0); //row1.RowStyle.FillBackgroundColor = ""; for (int i = 0; i < dt.Columns.Count; i++) { row1.CreateCell(i).SetCellValue(dt.Columns[i].ColumnName); } //将数据逐步写入sheet1各个行 for (int i = 0; i < dt.Rows.Count; i++) { NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + 1); for (int j = 0; j < dt.Columns.Count; j++) { rowtemp.CreateCell(j).SetCellValue(dt.Rows[i][j].ToString().Trim()); } } string strdate = DateTime.Now.ToString("yyyyMMddhhmmss");//获取当前时间 // 写入到客户端 System.IO.MemoryStream ms = new System.IO.MemoryStream(); book.Write(ms); ms.Seek(0, SeekOrigin.Begin); return File(ms, "application/vnd.ms-excel", strdate + "Excel.xls"); } /// <summary> /// Excel导入 /// </summary> /// <returns></returns> public ActionResult GetTableFromExcel() { //FileStream file = new FileStream(Server.HtmlEncode(Request.PhysicalApplicationPath).ToString() + "excel\\123.xlsx", FileMode.Open, FileAccess.Read); HttpPostedFileBase fostFile = Request.Files["file1"]; Stream streamfile = fostFile.InputStream; //HSSFWorkbook hssfworkbook = new HSSFWorkbook(streamfile); HSSFWorkbook hssfworkbook = new HSSFWorkbook(streamfile); using (NPOI.SS.UserModel.ISheet sheet = hssfworkbook.GetSheetAt(0)) { DataTable table = new DataTable(); IRow headerRow = sheet.GetRow(0);//第一行为标题行 int cellCount = headerRow.LastCellNum;//LastCellNum = PhysicalNumberOfCells int rowCount = sheet.LastRowNum;//LastRowNum = PhysicalNumberOfRows - 1 //handling header. for (int i = headerRow.FirstCellNum; i < cellCount; i++) { DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue); table.Columns.Add(column); } for (int i = (sheet.FirstRowNum + 1); i <= rowCount; i++) { IRow row = sheet.GetRow(i); DataRow dataRow = table.NewRow(); if (row != null) { for (int j = row.FirstCellNum; j < cellCount; j++) { if (row.GetCell(j) != null) dataRow[j] = GetCellValue(row.GetCell(j)); } } table.Rows.Add(dataRow); } for (int i = 0; i < table.Rows.Count; i++) { //myUpLoadBLL.ForDownLoad(table.Rows[i][1].ToString(), table.Rows[i][2].ToString(),Convert.ToBoolean( table.Rows[i][3])); } } return Content(""); } /// <summary> /// 根据Excel列类型获取列的值 /// </summary> /// <param name="cell">Excel列</param> /// <returns></returns> private static string GetCellValue(ICell cell) { if (cell == null) return string.Empty; switch (cell.CellType) { case CellType.BLANK: return string.Empty; case CellType.BOOLEAN: return cell.BooleanCellValue.ToString(); case CellType.ERROR: return cell.ErrorCellValue.ToString(); case CellType.NUMERIC: case CellType.Unknown: default: return cell.ToString(); case CellType.STRING: return cell.StringCellValue; case CellType.FORMULA: try { HSSFFormulaEvaluator e = new HSSFFormulaEvaluator(cell.Sheet.Workbook); e.EvaluateInCell(cell); return cell.ToString(); } catch { return cell.NumericCellValue.ToString(); } } } }
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