bug218提示导出失败

CallCenterCommon/CallCenter.Utility/NPOI/NPOIHelper.cs

@@ -114,7 +114,7 @@ namespace CallCenter.Utility
         /// <param name="Name"></param>
         /// <param name="dt"></param>
         /// <returns></returns>
-        public string ExportToExcel(string Name, DataTable dt, string[] cols = null)
+        public string ExportToExcel_old(string Name, DataTable dt, string[] cols = null)
         {
             try
             {
@@ -234,6 +234,193 @@ namespace CallCenter.Utility
             }
         }
 
+
+        /// <summary>
+        /// 弹出下载框导出excel => 创建多个Sheet：例如sheet1，sheet2...
+        /// </summary>
+        /// <param name="Name"></param>
+        /// <param name="dt"></param>
+        /// <returns></returns>
+        public string ExportToExcel(string Name, DataTable dt, string[] cols = null)
+        {
+            try
+            {
+                HSSFWorkbook workbook = new HSSFWorkbook();
+                //ISheet sheet = workbook.CreateSheet("Sheet1");
+                
+                //数据总数
+                int count = dt.Rows.Count;
+                //注意：1、Excel2003及以前版本65536行,256列;  2、Excel2007、2010版本1048576行,16384列
+                int sheetpage = 50000;   //这里设置5w条
+                //向上取整
+                int sheetindexcount = int.Parse(Math.Ceiling(Convert.ToDecimal((double)count / sheetpage)).ToString());
+                if(sheetindexcount == 0)
+                    sheetindexcount = 1;
+
+                for (int n = 1; n <= sheetindexcount; n++)
+                {
+                    ISheet sheet = workbook.CreateSheet("Sheet" + n);
+                    ICellStyle HeadercellStyle = workbook.CreateCellStyle();
+                    HeadercellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
+                    HeadercellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
+                    HeadercellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
+                    HeadercellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
+                    HeadercellStyle.Alignment = HorizontalAlignment.Center;
+                    HeadercellStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.SkyBlue.Index;
+                    HeadercellStyle.FillPattern = FillPattern.SolidForeground;
+                    HeadercellStyle.FillBackgroundColor = NPOI.HSSF.Util.HSSFColor.SkyBlue.Index;
+
+                    //字体
+                    NPOI.SS.UserModel.IFont headerfont = workbook.CreateFont();
+                    headerfont.Boldweight = (short)FontBoldWeight.Bold;
+                    headerfont.FontHeightInPoints = 12;
+                    HeadercellStyle.SetFont(headerfont);
+
+
+                    //用column name 作为列名
+                    int icolIndex = 0;
+                    IRow headerRow = sheet.CreateRow(0);
+                    if (cols == null || (cols != null && cols.Length == 0))
+                    {
+                        foreach (DataColumn dc in dt.Columns)
+                        {
+                            ICell cell = headerRow.CreateCell(icolIndex);
+                            cell.SetCellValue(dc.ColumnName);
+                            cell.CellStyle = HeadercellStyle;
+                            icolIndex++;
+                        }
+                    }
+                    else
+                    {
+                        foreach (string dc in cols)
+                        {
+                            ICell cell = headerRow.CreateCell(icolIndex);
+                            cell.SetCellValue(dc);
+                            cell.CellStyle = HeadercellStyle;
+                            icolIndex++;
+                        }
+                    }
+                    ICellStyle cellStyle = workbook.CreateCellStyle();
+
+                    //为避免日期格式被Excel自动替换，所以设定 format 为 『@』 表示一率当成text來看
+                    cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("@");
+                    cellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
+                    cellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
+                    cellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
+                    cellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
+
+
+                    NPOI.SS.UserModel.IFont cellfont = workbook.CreateFont();
+                    cellfont.Boldweight = (short)FontBoldWeight.Normal;
+                    cellStyle.SetFont(cellfont);
+                    if (dt.Rows.Count > 0)
+                    {
+                        //建立内容行
+                        int iRowIndex = 0;
+                        #region 修改不用
+                        //foreach (DataRow dr in dt.Rows)
+                        //{
+                        //    int iCellIndex = 0;
+                        //    IRow irow = sheet.CreateRow(iRowIndex + 1);
+                        //    for (int i = 0; i < dt.Columns.Count; i++)
+                        //    {
+                        //        string strsj = string.Empty;
+                        //        if (dr[i] != null)
+                        //        {
+                        //            strsj = dr[i].ToString();
+                        //        }
+                        //        ICell cell = irow.CreateCell(iCellIndex);
+                        //        cell.SetCellValue(strsj);
+                        //        cell.CellStyle = cellStyle;
+                        //        iCellIndex++;
+                        //    }
+                        //    iRowIndex++;
+                        //}
+                        #endregion
+
+                        int startcount = (n - 1) * sheetpage;
+                        int endcount = n * sheetpage;
+                        if (sheetindexcount == n)
+                            endcount = count;
+
+                        //for (int x = 0; x < dt.Rows.Count; x++)
+                        for (int x = startcount; x < endcount; x++)
+                        {
+                            int iCellIndex = 0;
+                            IRow irow = sheet.CreateRow(iRowIndex + 1);
+                            for (int i = 0; i < dt.Columns.Count; i++)
+                            {
+                                string strsj = string.Empty;
+                                if (dt.Rows[x][i] != null)
+                                {
+                                    strsj = dt.Rows[x][i].ToString();
+                                }
+                                ICell cell = irow.CreateCell(iCellIndex);
+                                cell.SetCellValue(strsj);
+                                cell.CellStyle = cellStyle;
+                                iCellIndex++;
+                            }
+                            iRowIndex++;
+                        }
+
+                        //自适应列宽度
+                        for (int i = 0; i < icolIndex; i++)
+                        {
+                            sheet.AutoSizeColumn(i);
+                        }
+                    }
+                }
+                using (MemoryStream ms = new MemoryStream())
+                {
+                    workbook.Write(ms);
+                    HttpContext curContext = HttpContext.Current;
+                    // 设置编码和附件格式
+                    curContext.Response.ContentType = "application/vnd.ms-excel";
+                    curContext.Response.ContentEncoding = Encoding.UTF8;
+                    curContext.Response.Charset = "";
+                    curContext.Response.AppendHeader("Content-Disposition",
+                        "attachment;filename=" + HttpUtility.UrlEncode(Name + ".xls", Encoding.UTF8));
+                    curContext.Response.BinaryWrite(ms.GetBuffer());
+                    workbook = null;
+                    ms.Close();
+                    ms.Dispose();
+                    curContext.Response.End();
+                }
+                return "";
+            }
+            catch(Exception ex)
+            {
+                return "导出失败！" + ex.Message;
+            }
+        }
+        /// <summary>
+        /// 创建Sheet
+        /// </summary>
+        /// <param name="workBook"></param>
+        /// <param name="sheetName"></param>
+        /// <returns></returns>
+        public ISheet CreateSheet(HSSFWorkbook workBook, string sheetName)
+        {
+            ISheet sheet = workBook.CreateSheet(sheetName);
+            IRow RowHead = sheet.CreateRow(0);
+
+            for (int iColumnIndex = 0; iColumnIndex < 10; iColumnIndex++)
+            {
+                RowHead.CreateCell(iColumnIndex).SetCellValue(Guid.NewGuid().ToString());
+            }
+
+            for (int iRowIndex = 0; iRowIndex < 20; iRowIndex++)
+            {
+                IRow RowBody = sheet.CreateRow(iRowIndex + 1);
+                for (int iColumnIndex = 0; iColumnIndex < 10; iColumnIndex++)
+                {
+                    RowBody.CreateCell(iColumnIndex).SetCellValue(DateTime.Now.Millisecond);
+                    sheet.AutoSizeColumn(iColumnIndex);
+                }
+            }
+            return sheet;
+        }
+
         /// <summary>
         /// 导入excel转换为datatable
         /// </summary>