非常简单实用的Excel导出

 1，Html代码：创建导出按钮（使用的是EasyUI插件）

<a href="javascript:void(0)" onclick="ExportSalesMaterialData()" class="easyui-linkbutton" data-options="iconCls:'icon-download',plain:true">导出查询数据</a></td>

 2，JS代码

function ExportSalesMaterialData() {
            var rows = $('#dg').datagrid('getRows');//dg为Table标签ID
            if (rows.length > 0) {
                $.messager.confirm('确认', '确定导出数据吗？', function (v) {
                    if (v) {

                        $('#form1').form('submit', {
                            url: "MBStatistics.aspx?action=excel&" + $("#form1").serialize(),//form1为form表单ID（例：<form id="form1" method="post"></form>）
                        });
                    }
                });
            } else {
                $.messager.alert("提示", "当前没有可导出数据！");
            }
        }

3，C# 代码

        public void ExportSalesMaterialData() 
        {
            StringBuilder filter = new StringBuilder();//这里为对应表单where条件
            filter.Append(" 1=1 and IsDelete=0 ");//*
            if (!string.IsNullOrWhiteSpace(GetPam("StartTime")))
            {
                filter.AppendFormat(" and CreateTime >= '{0}'", GetPam("StartTime"));
            }
            if (!string.IsNullOrWhiteSpace(GetPam("EndTime")))
            {
                filter.AppendFormat(" and CreateTime <= '{0}'", GetPam("EndTime"));
            }
            if (!string.IsNullOrWhiteSpace(GetPam("combProductStatusType")))
            {
                filter.AppendFormat(" and IsRelated  = '{0}'", GetPam("combProductStatusType"));
            }

            string where = filter.ToString();
            //注意：你只需要改sqlStr参数的sql语句，改成你要导出的sql即可
            string sqlStr = string.Format(@"  select CreateTime '日期',DrugUsersName '购药人',DrugUsersPhone '手机号',WXNumber  '微信',
ConfirmedDisease '确诊疾病',DrugName  '药品通用名',BrandName  '药品品牌',Specifications '急需药品规格',
Manufacturer '生产厂家', SurplusQuantity '剩余药品余量',[Address] '药品邮寄地址', Remake '备注',
case  IsRelated  when 1  then '联系' else '无联系' end '是否联系'  from ChronicDiseaseRegister
  WHERE {0}  ORDER BY CreateTime desc ", where);
            string fileName = DateTime.Now.ToString();
            Out2Excel(DAL.Base.SqlHelper.ExecuteDataSet("MallCenter", CommandType.Text, sqlStr).Tables[0], fileName);
        }

        private void Out2Excel(DataTable dtSource, string fileName)
        {
            HSSFWorkbook workbook = new HSSFWorkbook();
            HSSFSheet sheet = workbook.CreateSheet() as HSSFSheet;

            HSSFRow dataRow = null;
            int sheetMaxRowIndex = 65535;
            int currentRowIndex = 0;
            //填充内容   
            for (int i = 0; i < dtSource.Rows.Count; i++)
            {
                if (currentRowIndex == 0)
                {
                    //填充表头   
                    dataRow = sheet.CreateRow(currentRowIndex) as HSSFRow;
                    foreach (DataColumn column in dtSource.Columns)
                    {
                        HSSFCell cell = dataRow.CreateCell(column.Ordinal) as HSSFCell;
                        cell.SetCellValue(column.ColumnName);
                    }
                    currentRowIndex++;
                }


                dataRow = sheet.CreateRow(currentRowIndex) as HSSFRow;
                for (int j = 0; j < dtSource.Columns.Count; j++)
                {
                    HSSFCell cell = dataRow.CreateCell(j) as HSSFCell;
                    cell.CellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("@");
                    cell.SetCellValue(dtSource.Rows[i][j].ToString());
                }
                currentRowIndex++;
                if (currentRowIndex > sheetMaxRowIndex)
                {
                    sheet = workbook.CreateSheet() as HSSFSheet;
                    currentRowIndex = 0;
                }
            }

            //保存   
            using (MemoryStream ms = new MemoryStream())
            {
                workbook.Write(ms);

                Out2Client(ms, fileName);
            }
        }

        private void Out2Client(MemoryStream ms, string fileName)
        {
            byte[] data = ms.ToArray();

            if (!fileName.Contains(".xls") || !fileName.Contains(".xlsx"))
            {
                fileName += ".xls";
            }

            #region 客户端保存
            HttpResponse response = HttpContext.Current.Response;
            HttpRequest request = HttpContext.Current.Request;
            response.Clear();
            response.Charset = "UTF-8";
            response.ContentEncoding = System.Text.Encoding.UTF8;
            response.ContentType = "application/vnd-excel";//"application/vnd.ms-excel";
            if (request.UserAgent.ToLower().IndexOf("msie") > -1)
            {
                fileName = HttpUtility.UrlPathEncode(fileName);
            }
            if (request.UserAgent.ToLower().IndexOf("firefox") > -1)
            {
                response.AddHeader("Content-Disposition", "attachment;filename="" + fileName + """);
            }
            else
            {
                response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
            }
            response.AddHeader("Content-Length", data.Length.ToString());
            response.BinaryWrite(data);
            response.End();
            #endregion
        }

非常简单易懂，复制即用