【第十四篇】easyui datagrid导出excel

<a class="btn btn-app" onclick="exportExcel()"><i class="fa fa-edit"></i>导出Excel</a>

贴下面的代码之前，我想说一下

我的数据是主外键关系，有多张表关联，所以在做数据的时候，发现很多问题，读取的时候，它会自动读取所有的数据。

当然这不能满足我导出之后的要求，我只需要导出我要的字段即可，所以我进行了数据处理。

 //导出Excel
    function exportExcel() {
        var rows = $("#saleGrid").datagrid("getRows");

        for (var i = 0; i < rows.length; i++) {    //进行数据处理
            if (isArray(rows[i].OrganizedId)) {
                rows[i].OrganizedId = rows[i].OrganizedId[0];
            }
            if (isArray(rows[i].CustomerId)) {
                rows[i].CustomerId = rows[i].CustomerId[0];
            }
            if (rows[i].AdvanceDate != null) {
                var unix = rows[i].AdvanceDate.replace("/Date(", "").replace(")/", "");
                var un = unix.substring(0, 10);
                var newDate = new Date();
                newDate.setTime(un * 1000);

                rows[i].AdvanceDate = newDate.toLocaleString();
            }
            if (rows[i].OrderDate != null) {
                var unix = rows[i].OrderDate.replace("/Date(", "").replace(")/", "");
                var un = unix.substring(0, 10);
                var newDate = new Date();
                newDate.setTime(un * 1000);

                rows[i].OrderDate = newDate.toLocaleString();
            }
            if (rows[i].RetainageDate != null) {
                var unix = rows[i].RetainageDate.replace("/Date(", "").replace(")/", "");
                var un = unix.substring(0, 10);
                var newDate = new Date();
                newDate.setTime(un * 1000);

                rows[i].RetainageDate = newDate.toLocaleString();
            }

            //移除不要的字段
            delete rows[i].SaleAtts;
            delete rows[i].SaleOrderId;
            delete rows[i].SaleOrderItems;
            delete rows[i].SaleStatus;
            delete rows[i].UserName;
            delete rows[i].Customer;
            delete rows[i].AddDate;

        }
        var bodyData = JSON.stringify(rows);  //转成json字符串

        //替换中文标题
        var a = bodyData.replace(/SaleOrderNo/g, "订单编号").replace(/OrderType/g, "订单类型").replace(/FromWhere/g, "订单来源")
       .replace(/OrganizedId/g, "机构").replace(/SaleUser/g, "销售员").replace(/SaleTc/g, "销售提成").replace(/OrderDate/g, '订单日期')
       .replace(/ContractNo/g, "合同编号").replace(/Amount/g, "总额").replace(/Advance/g, "首付款").replace(/AdvanceDate/g, "首付款日期")
       .replace(/PayMethod/g, "支付方式").replace(/Retainage/g, "尾款").replace(/RetainageDate/g, "尾款日期").replace(/InlayPrice/g, "镶嵌款")
       .replace(/CustManager/g, "客户经理").replace(/EquityNo/g, "认股书编号").replace(/LogisticsTotal/g, "物流费用")
       .replace(/Remarks/g, "备注").replace(/CompletedStatus/g, "状态").replace(/CustomerId/g, "终端客户");

        var postData = {
            data: a
        };

        $.ajax({
            type: "POST",
            url: "ExportExcel",
            data: postData,
            success: function (data) {
                if (data == "1") {
                    layer.msg("操作成功,文件在桌面！", {
                        icon: 6,
                        time: 2000,
                    });
                } else if (data == "-1") {
                    layer.msg("操作失败！", { icon: 2 });
                }
            }
        });
    }

        /// <summary>
        /// 导出Excel
        /// </summary>
        /// <returns></returns>
        public ActionResult ExportExcel()
        {
            string json = Request.Params["data"];
            try
            {
                DataTable dt = ExcelHelper.JsonToDataTable(json);
                string pathDestop = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
                ExcelHelper.GridToExcelByNPOI(dt, pathDestop + "\\" + "销售订单-" + DateTime.Now.ToString("yyyy-MM-dd") + "导出" + ".xls");
                return Content("");
            }
            catch (Exception)
            {
                return Content("-1");
            }
        }

效果图

导出之后

帮助类贴下面

 /// <summary>
    /// 将json转换为DataTable
    /// </summary>
    /// <param name="strJson">得到的json</param>
    /// <returns></returns>
    public static DataTable JsonToDataTable(string strJson)
    {
        //转换json格式
        strJson = strJson.Replace(",\"", "*\"").Replace("\":", "\"#").ToString();
        //取出表名
        var rg = new Regex(@"(?<={)[^:]+(?=:\[)", RegexOptions.IgnoreCase);
        string strName = rg.Match(strJson).Value;
        DataTable tb = null;
        //去除表名
        strJson = strJson.Substring(strJson.IndexOf("[") + );
        strJson = strJson.Substring(, strJson.IndexOf("]"));

        //获取数据
        rg = new Regex(@"(?<={)[^}]+(?=})");
        MatchCollection mc = rg.Matches(strJson);
        for (int i = ; i < mc.Count; i++)
        {
            string strRow = mc[i].Value;
            string[] strRows = strRow.Split('*');

            //创建表
            if (tb == null)
            {
                tb = new DataTable();
                tb.TableName = strName;
                foreach (string str in strRows)
                {
                    var dc = new DataColumn();
                    string[] strCell = str.Split('#');

                    if (strCell[].Substring(, ) == "\"")
                    {
                        int a = strCell[].Length;
                        dc.ColumnName = strCell[].Substring(, a - );
                    }
                    else
                    {
                        dc.ColumnName = strCell[];
                    }
                    tb.Columns.Add(dc);
                }
                tb.AcceptChanges();
            }

            //增加内容
            DataRow dr = tb.NewRow();
            for (int r = ; r < strRows.Length; r++)
            {
                try
                {
                    string a = strRows[r].Split('#')[].Trim();
                    if (a.Equals("null"))
                    {
                        dr[r] = "";
                    }
                    else
                    {
                        dr[r] = strRows[r].Split('#')[].Trim().Replace("，", ",").Replace("：", ":").Replace("\"", "");
                    }
                }
                catch (Exception e)
                {

                    throw e;
                }
            }
            tb.Rows.Add(dr);
            tb.AcceptChanges();
        }

        try
        {
            if (tb != null)
            {
                return tb;
            }
            else
            {
                throw new Exception("解析错误");
            }
        }
        catch (Exception e)
        {

            throw e;
        }
    }

在网上找到一个GridToExcelByNPOI   你们将就用用吧

/// <summary>
/// DataTable写入Excel
/// </summary>
/// <param name="dt"></param>
/// <param name="strExcelFileName"></param>
/// <returns></returns>
public bool GridToExcelByNPOI(DataTable dt, string strExcelFileName)
{
    try
    {
        HSSFWorkbook workbook = new HSSFWorkbook();
        ISheet sheet = workbook.CreateSheet("Sheet1");

        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 = NPOI.SS.UserModel.HorizontalAlignment.Center;
        //字体
        NPOI.SS.UserModel.IFont headerfont = workbook.CreateFont();
        headerfont.Boldweight = (short)FontBoldWeight.Bold;
        HeadercellStyle.SetFont(headerfont);

        //用column name 作为列名
        int icolIndex = ;
        IRow headerRow = sheet.CreateRow();
        foreach (DataColumn item in dt.Columns)
        {
            ICell cell = headerRow.CreateCell(icolIndex);
            cell.SetCellValue(item.ColumnName);
            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);

        //建立内容行
        int iRowIndex = ;
        int iCellIndex = ;
        foreach (DataRow Rowitem in dt.Rows)
        {
            IRow DataRow = sheet.CreateRow(iRowIndex);
            foreach (DataColumn Colitem in dt.Columns)
            {

                ICell cell = DataRow.CreateCell(iCellIndex);
                cell.SetCellValue(Rowitem[Colitem].ToString());
                cell.CellStyle = cellStyle;
                iCellIndex++;
            }
            iCellIndex = ;
            iRowIndex++;
        }

        //自适应列宽度
        for (int i = ; i < icolIndex; i++)
        {
            sheet.AutoSizeColumn(i);
        }

        //写Excel
        FileStream file = new FileStream(strExcelFileName, FileMode.OpenOrCreate);
        workbook.Write(file);
        file.Flush();
        file.Close();
        return true;
    }
    catch (Exception ex)
    {
        return false;
    }
}

/// <summary>
/// 将excel中的数据导入到DataTable中
/// </summary>
/// <param name="fileName">fileName</param>
/// <param name="sheetName">excel工作薄sheet的名称</param>
/// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param>
/// <returns>返回的DataTable</returns>
public DataTable ExcelToDataTable(string fileName, string sheetName, bool isFirstRowColumn)
{
    ISheet sheet = null;
    DataTable data = new DataTable();
    IWorkbook workbook = null;
    FileStream fs = null;
    int startRow = ;
    try
    {
        fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
        if (fileName.IndexOf(".xlsx") > ) // 2007版本
            workbook = new XSSFWorkbook(fs);
        else if (fileName.IndexOf(".xls") > ) // 2003版本
            workbook = new HSSFWorkbook(fs);

        if (sheetName != null)
        {
            sheet = workbook.GetSheet(sheetName);
            if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
            {
                sheet = workbook.GetSheetAt();
            }
        }
        else
        {
            sheet = workbook.GetSheetAt();
        }
        if (sheet != null)
        {
            IRow firstRow = sheet.GetRow();
            int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数

            if (isFirstRowColumn)
            {
                for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
                {
                    ICell cell = firstRow.GetCell(i);
                    if (cell != null)
                    {
                        string cellValue = cell.StringCellValue;
                        if (cellValue != null)
                        {
                            DataColumn column = new DataColumn(cellValue);
                            data.Columns.Add(column);
                        }
                    }
                }
                startRow = sheet.FirstRowNum + ;
            }
            else
            {
                startRow = sheet.FirstRowNum;
            }

            //最后一列的标号
            int rowCount = sheet.LastRowNum;
            for (int i = startRow; i <= rowCount; ++i)
            {
                IRow row = sheet.GetRow(i);
                if (row == null) continue; //没有数据的行默认是null　　　　　　　

                DataRow dataRow = data.NewRow();
                for (int j = row.FirstCellNum; j < cellCount; ++j)
                {
                    if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
                        dataRow[j] = row.GetCell(j).ToString();
                }
                data.Rows.Add(dataRow);
            }
        }

        return data;
    }
    catch (Exception ex)
    {
        Console.WriteLine("Exception: " + ex.Message);
        return null;
    }
}
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版权声明：本文为CSDN博主「lbx_15887055073」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/lbx_15887055073/article/details/82194414

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转载请记得说明作者和出处哦-.-
作者：KingDuDu
原文出处：https://www.cnblogs.com/kingdudu/articles/4863980.html

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