Asp.Net使用Npoi导入导出Excel的方法_实用技巧_

 public void NpoiExcel(DataTable dt, string title) { 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); ICellStyle style = book.CreateCellStyle(); style.Alignment = HorizontalAlignment.Center; style.VerticalAlignment = VerticalAlignment.Center; for (int i = 0; i < dt.Columns.Count; i++) { ICell cell = headerrow.CreateCell(i); cell.CellStyle = style; cell.SetCellValue(dt.Columns[i].ColumnName); } 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(); } 

 /// 
 /// 连接Excel 读取Excel数据 并返回DataSet数据集合 /// 
 /// Excel服务器路径 /// Excel表名称 ///  public static System.Data.DataSet ExcelSqlConnection(string filepath, string tableName) { string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;HDR=YES;IMEX=1'"; OleDbConnection ExcelConn = new OleDbConnection(strCon); try { string strCom = string.Format("SELECT * FROM [Sheet1$]"); ExcelConn.Open(); OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, ExcelConn); DataSet ds = new DataSet(); myCommand.Fill(ds, "[" + tableName + "$]"); ExcelConn.Close(); return ds; } catch { ExcelConn.Close(); return null; } }