NPOI将DataGridView中的数据导出+导出Chart图表图片至Excel

Posted 2021-01-18 yykun

 #region 导出Excel
        private HSSFWorkbook Workbook = null;
        private Sheet SheetOne = null;
        private DataFormat DataFormat;//创建格式
        private string TempImagePath = Application.StartupPath + "\\TempImages\\";
        private void btnExportExcel_Click(object sender, EventArgs e)
        {
            if (!Directory.Exists(TempImagePath)) Directory.CreateDirectory(TempImagePath);
            TempImagePath = TempImagePath + DateTime.Now.ToString("yyyyMMddhhmmss") + "CodeChart.jpg";
            this.chartImage.SaveImage(TempImagePath, System.Drawing.Imaging.ImageFormat.Jpeg);
            ExportDGVToExcel("号源信息");
        }

        /// <summary>
        /// 导出到Excel
        /// </summary>
        private void ExportDGVToExcel(string sheetName)
        {
            if (this.dgvList.Rows.Count == 0) return;
            SaveFileDialog sf = new SaveFileDialog();
            sf.Filter = "Excel文件(*.xls)|*.xls";
            if (sf.ShowDialog() != System.Windows.Forms.DialogResult.OK) return;
            string filePath = sf.FileName;

            try
            {
                if (File.Exists(filePath)) File.Delete(filePath);

                if (Workbook == null) Workbook = new HSSFWorkbook();//创建一个workbook
                if (SheetOne == null) SheetOne = Workbook.CreateSheet(sheetName);//创建一个sheet
                if (DataFormat == null) DataFormat = Workbook.CreateDataFormat();//创建格式
                //获取设置样式
                CellStyle headerCellStyle = GetHeaderCellStyle();
                CellStyle cellStyle = GetValueCellStyle();
                //将数据保存到Excel
                SaveDgvValueToExcel(headerCellStyle, cellStyle);
                //将Chart图片保存到Excel
                if (File.Exists(TempImagePath))
                {
                    SaveChartImgToExcel(Workbook, SheetOne, headerCellStyle);
                    File.Delete(TempImagePath);
                }

                FileStream file = new FileStream(filePath, FileMode.CreateNew, FileAccess.Write);//创建文件                
                MemoryStream ms = new MemoryStream();
                Workbook.Write(ms);//写入到流
                //转换为字节数组
                byte[] bytes = ms.ToArray();
                file.Write(bytes, 0, bytes.Length);
                file.Flush();

                //释放资源
                bytes = null;
                ms.Close();
                ms.Dispose();

                file.Close();
                file.Dispose();

                Workbook.Dispose();
                SheetOne = null;
                Workbook = null;
                DialogResult result = ShowMessage.Instance.Show("提示", filePath+"--保存完成
是否查看？", true);
                if (DialogResult.OK.Equals(result)) System.Diagnostics.Process.Start(filePath);
            }
            catch (Exception ex)
            {
                ShowMessage.Instance.Show("失败", "保存的过程中发现如下异常:
" + ex.Message, false);
            }
        }
        /// <summary>
        /// 获取Excel内容列样式
        /// </summary>
        /// <returns></returns>
        private CellStyle GetValueCellStyle()
        {
            CellStyle style = Workbook.CreateCellStyle(); //创建单元格样式
            style.DataFormat = DataFormat.GetFormat("@");//设置为文本格式，也可以为 text，即 dataFormat.GetFormat("text");
            //设置字体
            HSSFFont font = (HSSFFont)Workbook.CreateFont();
            //font.Boldweight = (short)FontBoldWeight.BOLD;
            font.FontHeightInPoints = 11;//字号
            font.FontName = "微软雅黑";
            //font.Color = short.Parse("#4169E1");//字体颜色
            font.Color = HSSFColor.DARK_TEAL.index;
            style.SetFont(font);
            //设置居中
            style.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.CENTER;//垂直对齐
            //style.Alignment = NPOI.SS.UserModel.HorizontalAlignment.CENTER;//水平对齐
            return style;
        }
        /// <summary>
        /// 获取Excel标题列样式
        /// </summary>
        /// <returns></returns>
        private CellStyle GetHeaderCellStyle()
        {
            CellStyle style = Workbook.CreateCellStyle();//表头单元格格式
            style.DataFormat = DataFormat.GetFormat("@");
            //设置背景色
            style.FillForegroundColor = HSSFColor.LIGHT_BLUE.index;
            style.FillPattern = FillPatternType.SOLID_FOREGROUND;
            //设置字体
            HSSFFont font = (HSSFFont)Workbook.CreateFont();
            font.Boldweight = (short)FontBoldWeight.BOLD;
            font.FontHeightInPoints = 12;//字号
            font.FontName = "微软雅黑";
            //font.Color = short.Parse("#4169E1");//字体颜色
            font.Color = HSSFColor.WHITE.index;
            style.SetFont(font);
            //设置边框
            style.BorderBottom = CellBorderType.THIN;
            style.BorderLeft = CellBorderType.THIN;
            style.BorderRight = CellBorderType.THIN;
            style.BorderTop = CellBorderType.THIN;
            //设置居中
            style.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.CENTER;//垂直对齐
            return style;
        }
        /// <summary>
        /// 将数据保存到Excel
        /// </summary>
        /// <param name="headerCellStyle">标题样式</param>
        /// <param name="cellStyle">内容单元格样式</param>
        private void SaveDgvValueToExcel(CellStyle headerCellStyle, CellStyle cellStyle)
        {
            //设置标题行
            int index = 0;
            Row rowH = SheetOne.CreateRow(0);//创建一行
            rowH.Height = 450;//第一行行高
            for (int j = 1; j < this.dgvList.Columns.Count; j++)
            {
                DataGridViewColumn col = this.dgvList.Columns[j];
                if (col.Visible)//不可见列不保存
                {
                    Cell cellH = rowH.CreateCell(index);
                    cellH.SetCellValue(col.HeaderText);
                    cellH.CellStyle = headerCellStyle;
                    SheetOne.SetColumnWidth(index, col.Width * 35);
                    index++;
                }
            }
            //写入行数据
            for (int i = 0; i < this.dgvList.Rows.Count; i++)
            {
                Row row = SheetOne.CreateRow(i + 1);//跳过第一行
                index = 0;
                for (int j = 1; j < this.dgvList.Columns.Count; j++)
                {
                    if (this.dgvList.Columns[j].Visible)
                    {
                        Cell cell = row.CreateCell(index);
                        cell.SetCellValue(this.dgvList.Rows[i].Cells[j].Value == null ? "" : this.dgvList.Rows[i].Cells[j].Value.ToString());
                        cell.CellStyle = cellStyle;
                        index++;
                    }
                }
            }
        }
        /// <summary>
        /// 将Chart图片保存到Excel
        /// </summary>
        /// <param name="workbook">HSSFWorkbook workbook</param>
        /// <param name="sheet">Sheet sheet</param>
        /// <param name="headerCellStyle">标题样式</param>
        private void SaveChartImgToExcel(HSSFWorkbook workbook, Sheet sheet, CellStyle headerCellStyle)
        {
            int rowLine = this.dgvList.Rows.Count + 2;
            Row titleRow = sheet.CreateRow(rowLine);//跳过第一行
            Row imgRow = sheet.CreateRow(rowLine + 1);//跳过第一行
            imgRow.Height = 10000;
            //填入生产单号
            //titleRow.CreateCell(0, CellType.STRING).SetCellValue(""号源图标信息如下："");
            Cell cellTitle = titleRow.CreateCell(0);
            cellTitle.SetCellValue("号源图标信息如下：");
            cellTitle.CellStyle = headerCellStyle;
            Cell nouse = titleRow.CreateCell(1);
            nouse.CellStyle = headerCellStyle;
            //将图片文件读入一个字符串
            HSSFPatriarch patriarch = (HSSFPatriarch)sheet.CreateDrawingPatriarch();
            SetPic(workbook, patriarch, TempImagePath, rowLine + 1, 0);
        }
        /// <summary>
        /// 将图片插入到指定位置
        /// </summary>
        /// <param name="workbook">HSSFWorkbook workbook</param>
        /// <param name="patriarch">HSSFPatriarch patriarch</param>
        /// <param name="path">图片路径</param>
        /// <param name="rowline">行索引</param>
        /// <param name="col">列索引</param>
        private void SetPic(HSSFWorkbook workbook, HSSFPatriarch patriarch, string path, int rowline, int col)
        {
            if (string.IsNullOrEmpty(path)) return;
            byte[] bytes = System.IO.File.ReadAllBytes(path);
            int pictureIdx = workbook.AddPicture(bytes, PictureType.JPEG);
           //margin左上右下列、行、span clo
            HSSFClientAnchor anchor = new HSSFClientAnchor(70, 10, 0, 0, col, rowline, col + 8, rowline + 1);
            //把图片插到相应的位置
            HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);
        }

        #endregion

　　运行效果如下：