C#中怎么使用Npoi导出Excel合并行列

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现在用Npoi导出Excel，导出表格是合并行列，如图：

导出的要求：合计列要进行合并，序号一致的要合并。最后一行要合并列。
因为相同序号数量不是固定的，要动态算合并的行数。

合并行列接口：XXX.AddMergedRegion(new CellRangeAddress(开始行, 最后一行, 开始列, 最后一列));

隐藏指定：sheet.SetColumnHidden(cellIndex, true);

引用组件：

NPOI.dll；
NPOI.OOXML.dll；
NPOI.OpenXml4Net.dll；
NPOI.OpenXmlFORMats.dll；
ICSharpcode.SharpZipLib.dll；

代码如下：

/// <summary>/// /// </summary>/// <param name="dtSource">数据源</param>/// <param name="strFileName">保存路径</param>/// <param name="dvXH">序号</param>public void Export(DataTable dtSource,string strFileName,DataView dvXH=null)        {            //创建工作簿 office2007以上            XSSFWorkbook workbook = new XSSFWorkbook();            //为工作簿创建工作表并命名            ISheet sheet = workbook.CreateSheet("商品表");            ICellStyle dateStyle = workbook.CreateCellStyle();            IDataFormat format = workbook.CreateDataFormat();            dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");            #region 表头及样式            int cellIndex = 0;            IRow headerRow = sheet.CreateRow(0);            for (int i = 0; i < dtSource.Columns.Count; i++)            {                #region MyRegion                string ColumnsName = dtSource.Columns[i].ToString();                if (dtSource.Columns[i].ColumnName.EndsWith("XH"))                {                    ColumnsName = "序号";                    sheet.SetColumnWidth(cellIndex, 3000);                   //sheet.SetColumnHidden(cellIndex, true);隐藏指定列                }                else if (dtSource.Columns[i].ColumnName.EndsWith("GoogName"))                {                    ColumnsName = "商品名称";                    sheet.SetColumnWidth(cellIndex,10000);//设置列宽                }                else if (dtSource.Columns[i].ColumnName.EndsWith("Num"))                {                    ColumnsName = "数量";                    sheet.SetColumnWidth(cellIndex, 5000);                }                else if (dtSource.Columns[i].ColumnName.EndsWith("Summation"))                {                    ColumnsName = "合计（元）";                    sheet.SetColumnWidth(cellIndex, 5000);                }                #endregion                //设置行高                headerRow.HeightInPoints = 35;                 headerRow.CreateCell(cellIndex).SetCellValue(ColumnsName);                ICellStyle headStyle = workbook.CreateCellStyle();                headStyle.WrapText = true;                IFont font = workbook.CreateFont();                //字体大小                font.FontHeightInPoints = 12;                font.Boldweight = 360;                headStyle.SetFont(font);                headerRow.GetCell(cellIndex).CellStyle = headStyle;                cellIndex++;            }            #endregion            int rowIndex = 1;//行数一定要从1行开始            int count = 1;            int startRow = 1;            DataView dvSource = dtSource.DefaultView;            if (dvXH!=null)            {                foreach (DataRowView drv in dvXH)                {//1-10.11-12,13-14,15-16                    int rowcout = 0;                    dvSource.RowFilter = "XH='" + drv["XH"] + "'";                    foreach (DataRowView row in dvSource)                    {                        #region 填充内容                        IRow dataRow = sheet.CreateRow(rowIndex);                        //序号                        ICell newCel0 = dataRow.CreateCell(0);                        ICellStyle style0 = workbook.CreateCellStyle();                        style0.DataFormat = format.GetFormat("text");                        newCel0.SetCellValue(row["XH"].ToString());                        //标的名称                        ICell newCel2 = dataRow.CreateCell(1);                        ICellStyle style2 = workbook.CreateCellStyle();                        style2.DataFormat = format.GetFormat("text");                        newCel2.SetCellValue(row["GoogName"].ToString());                        //标的数量                        ICell newCel4 = dataRow.CreateCell(2);                        ICellStyle style4 = workbook.CreateCellStyle();                        style4.DataFormat = format.GetFormat("text");                        newCel4.SetCellValue(row["Num"].ToString());                        //合计（元）                        ICell newCel8 = dataRow.CreateCell(3);                        ICellStyle style8 = workbook.CreateCellStyle();                        style8.DataFormat = format.GetFormat("text");                        newCel8.SetCellValue(row["Summation"].ToString());                        #endregion                        rowIndex++;                        rowcout++;                    }                    if (count == 1)                    {                        //合并行数                        sheet.AddMergedRegion(new CellRangeAddress(startRow, rowcout, 3, 3));                        startRow = startRow + rowcout;                    }                    else                    {                        sheet.AddMergedRegion(new CellRangeAddress(startRow, startRow + rowcout - 1, 3, 3));                        startRow = startRow + rowcout;                    }                    count++;                }            }            else            {                #region MyRegion                foreach (DataRowView row in dvSource)                {                    #region 填充内容                    IRow dataRow = sheet.CreateRow(rowIndex);                    //序号                    ICell newCel0 = dataRow.CreateCell(0);                    ICellStyle style0 = workbook.CreateCellStyle();                    style0.DataFormat = format.GetFormat("text");                    newCel0.SetCellValue(row["XH"].ToString());                                  //商品名称                    ICell newCel1 = dataRow.CreateCell(1);                    ICellStyle style1 = workbook.CreateCellStyle();                    style1.DataFormat = format.GetFormat("text");                    newCel1.SetCellValue(row["GoogName"].ToString());                    //数量                    ICell newCel2 = dataRow.CreateCell(2);                    ICellStyle style2 = workbook.CreateCellStyle();                    style2.DataFormat = format.GetFormat("text");                    newCel2.SetCellValue(row["Num"].ToString());                                       //合计（元）                    ICell newCel3 = dataRow.CreateCell(3);                    ICellStyle style3 = workbook.CreateCellStyle();                    style3.DataFormat = format.GetFormat("text");                    newCel3.SetCellValue(row["Summation"].ToString());                    #endregion                    rowIndex++;                }                #endregion            }            #region 拼接最后一行            IFont fontLast = workbook.CreateFont();            fontLast.FontHeightInPoints = 30;            fontLast.Boldweight = 480;            IRow dataRowLast = sheet.CreateRow(rowIndex);            dataRowLast.HeightInPoints = 40;            ICell newCelLast = dataRowLast.CreateCell(0);            ICellStyle styleLast = workbook.CreateCellStyle();            styleLast.DataFormat = format.GetFormat("text");            styleLast.SetFont(fontLast);            newCelLast.SetCellValue("制作人：张三");            sheet.AddMergedRegion(new CellRangeAddress(rowIndex, rowIndex, 0, 3));            #endregion            MemoryStream stream = new MemoryStream();            workbook.Write(stream);            var buf = stream.ToArray();            using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))            {                fs.Write(buf, 0, buf.Length);                fs.Flush();            }}

实际运用中，涉及到数据，方法中有很多校验等操作，方法直观可读性不是太好，下面附上简单导出的方法：

实际上导出Excel，总结有几点：

引用相关组件
2、创建一个工作簿，创建工作表并命名；
3、设置表头及样式；
4、填充数据；
5、保存数据到指定位置；

/// <summary>/// 简单导出数据/// </summary>/// <param name="dtSource">数据源</param>/// <param name="strFileName">保存路径</param>/// <param name="dvXH">序号</param>        public void Export1(DataTable dtSource, string strFileName)        {            //创建工作簿            XSSFWorkbook workbook = new XSSFWorkbook();            //为工作簿创建工作表并命名            ISheet sheet = workbook.CreateSheet("商品表");            IDataFormat format = workbook.CreateDataFormat();            #region 表头及样式            int cellIndex = 0;            IRow headerRow = sheet.CreateRow(0);            for (int i = 0; i < dtSource.Columns.Count; i++)            {                //设置行高                headerRow.HeightInPoints = 35;                headerRow.CreateCell(cellIndex).SetCellValue(dtSource.Columns[i].ToString());                ICellStyle headStyle = workbook.CreateCellStyle();                headStyle.WrapText = true;                IFont font = workbook.CreateFont();                //字体大小                font.FontHeightInPoints = 12;                font.Boldweight = 360;                headStyle.SetFont(font);                headerRow.GetCell(cellIndex).CellStyle = headStyle;                cellIndex++;            }            #endregion            #region 数据填充            int rowIndex = 1;//行数一定要从1行开始，因为上面已经创建了表头为0行;            DataView dvSource = dtSource.DefaultView;            foreach (DataRow row in dtSource.Rows)            {                int ColumnIndex = 0;                IRow dataRow = sheet.CreateRow(rowIndex);                foreach (DataColumn column in dtSource.Columns)                {                    //序号                    ICell newCel0 = dataRow.CreateCell(ColumnIndex);                    ICellStyle style0 = workbook.CreateCellStyle();                    style0.DataFormat = format.GetFormat("text");//数据类型                    newCel0.SetCellValue(row[column.ColumnName].ToString());                    ColumnIndex++;                }                rowIndex++;            }            #endregion            #region 保存到指定位置            MemoryStream stream = new MemoryStream();            workbook.Write(stream);            var buf = stream.ToArray();            using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))            {                fs.Write(buf, 0, buf.Length);                fs.Flush();            }            #endregion}

感谢各位的阅读，以上就是“C#中怎么使用Npoi导出Excel合并行列”的内容了，经过本文的学习后，相信大家对C#中怎么使用Npoi导出Excel合并行列这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是编程网，小编将为大家推送更多相关知识点的文章，欢迎关注！