NonWovenFabric/WindowsFormsApp6/MainForm.cs

using System;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
using System.IO;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using NPOI.SS.Util;
using NPOIBorderStyle = NPOI.SS.UserModel.BorderStyle;
using NPOIHorizontalAlignment = NPOI.SS.UserModel.HorizontalAlignment;

namespace WindowsFormsApp6
{
    public partial class MainForm : Form
    {
        private Form1 form1Instance;
        private Form2 form2Instance;
        private Form3 form3Instance;
        private System.Windows.Forms.Timer clockTimer;

        public MainForm()
        {
            InitializeComponent();
            InitializeClockTimer();
            InitializeTabControl();
            InitializeEmbeddedForms();
        }

        private void InitializeClockTimer()
        {
            clockTimer = new System.Windows.Forms.Timer();
            clockTimer.Interval = 1000;
            clockTimer.Tick += (s, e) => label2.Text = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
            clockTimer.Start();
        }

        private void InitializeTabControl()
        {
            tabControl1.SelectedIndexChanged += TabControl1_SelectedIndexChanged;
        }

        private void TabControl1_SelectedIndexChanged(object sender, EventArgs e)
        {
            UpdateTitleForCurrentTab();
            
            // 根据选中的 Tab 显示/隐藏切换布局按钮
            // 只有在 Form3 (Tab 2, index=2) 时显示切换按钮
            buttonToggleLayout.Visible = (tabControl1.SelectedIndex == 2);
            
            // 更新切换按钮的文本
            if (tabControl1.SelectedIndex == 2 && form3Instance != null)
            {
                UpdateToggleButtonText();
            }
        }

        private void UpdateTitleForCurrentTab()
        {
            switch (tabControl1.SelectedIndex)
            {
                case 0:
                    label1.Text = " 液体吸收时间测试报告";
                    break;
                case 1:
                    label1.Text = " 液体吸收量测试报告";
                    break;
                case 2:
                    label1.Text = " 液体芯吸速率测试报告";
                    break;
            }
        }

        private void InitializeEmbeddedForms()
        {
            form1Instance = new Form1();
            form1Instance.TopLevel = false;
            form1Instance.FormBorderStyle = FormBorderStyle.None;
            form1Instance.Dock = DockStyle.Fill;
            
            Panel panel1 = new Panel();
            panel1.Dock = DockStyle.Fill;
            panel1.Controls.Add(form1Instance.Controls["tableLayoutPanel1"].Controls["panel3"]);
            tabPage1.Controls.Add(panel1);
            form1Instance.Show();

            form2Instance = new Form2();
            form2Instance.TopLevel = false;
            form2Instance.FormBorderStyle = FormBorderStyle.None;
            form2Instance.Dock = DockStyle.Fill;
            
            Panel panel2 = new Panel();
            panel2.Dock = DockStyle.Fill;
            panel2.Controls.Add(form2Instance.Controls["tableLayoutPanel1"].Controls["panel3"]);
            tabPage2.Controls.Add(panel2);
            form2Instance.Show();

            form3Instance = new Form3();
            form3Instance.TopLevel = false;
            form3Instance.FormBorderStyle = FormBorderStyle.None;
            form3Instance.Dock = DockStyle.Fill;
            
            Panel panel3 = new Panel();
            panel3.Dock = DockStyle.Fill;
            panel3.Controls.Add(form3Instance.Controls["tableLayoutPanel1"].Controls["panel3"]);
            tabPage3.Controls.Add(panel3);
            form3Instance.Show();
        }

        private void buttonPrint_Click(object sender, EventArgs e)
        {
            MessageBox.Show("打印功能开发中", "提示");
        }

        private void buttonExport_Click(object sender, EventArgs e)
        {
            SaveFileDialog saveFileDialog = new SaveFileDialog
            {
                Filter = "Excel 文件 (*.xlsx)|*.xlsx",
                FileName = $"测试报告_{DateTime.Now:yyyyMMdd_HHmmss}",
                Title = "导出整合报告"
            };

            if (saveFileDialog.ShowDialog() == DialogResult.OK)
            {
                ExportIntegratedReport(saveFileDialog.FileName);
            }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            switch (tabControl1.SelectedIndex)
            {
                case 0:
                    form1Instance.GenerateMockData();
                    break;
                case 1:
                    form2Instance.GenerateMockData();
                    break;
                case 2:
                    form3Instance.GenerateMockData();
                    break;
            }
        }

        private void buttonToggleLayout_Click(object sender, EventArgs e)
        {
            if (form3Instance != null)
            {
                // 调用 Form3 的公共切换方法
                form3Instance.ToggleTableLayout();
                
                // 更新按钮文本
                UpdateToggleButtonText();
            }
        }

        /// <summary>
        /// 更新切换按钮的文本
        /// </summary>
        private void UpdateToggleButtonText()
        {
            if (form3Instance != null)
            {
                // 使用公共方法获取布局状态
                bool isVertical = form3Instance.IsVerticalLayout();
                buttonToggleLayout.Text = isVertical ? "🔄 横向布局" : "🔄 纵向布局";
            }
        }

        private void ExportIntegratedReport(string filePath)
        {
            try
            {
                IWorkbook workbook = new XSSFWorkbook();
                
                // 创建单个整合的工作表
                CreateIntegratedSheet(workbook);

                using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write))
                {
                    workbook.Write(fs);
                }

                MessageBox.Show($"导出成功：{filePath}", "成功");
            }
            catch (Exception ex)
            {
                MessageBox.Show($"导出失败：{ex.Message}", "错误");
            }
        }

        private void CreateIntegratedSheet(IWorkbook workbook)
        {
            ISheet sheet = workbook.CreateSheet("吸收性测试报告");
            var styles = CreateReportStyles(workbook);

            // 获取三个表单的数据
            var sampleCountField1 = form1Instance.GetType()
                .GetField("currentSampleCount", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            int sampleCount = sampleCountField1 != null ? (int)sampleCountField1.GetValue(form1Instance) : 5;

            var dataTableField1 = form1Instance.GetType()
                .GetField("sampleDataTable", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            DataTable dataTable1 = dataTableField1?.GetValue(form1Instance) as DataTable;

            var dataTableField2 = form2Instance.GetType()
                .GetField("sampleDataTable", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            DataTable dataTable2 = dataTableField2?.GetValue(form2Instance) as DataTable;

            var dataTableField3 = form3Instance.GetType()
                .GetField("sampleDataTable", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
            DataTable dataTable3 = dataTableField3?.GetValue(form3Instance) as DataTable;

            int currentRow = 0;

            // 1. 创建总标题
            IRow titleRow = sheet.CreateRow(currentRow++);
            titleRow.Height = 800;
            ICell titleCell = titleRow.CreateCell(0);
            titleCell.SetCellValue("吸收性测试报告");
            titleCell.CellStyle = styles.titleStyle;
            // 为合并区域的所有单元格设置样式（总标题不需要边框，但为了一致性也设置）
            for (int i = 1; i <= sampleCount + 5; i++)
            {
                titleRow.CreateCell(i).CellStyle = styles.titleStyle;
            }
            sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, sampleCount + 5));

            currentRow++; // 空行

            // 2. 创建信息输入区域
            CreateInfoSection(sheet, ref currentRow, sampleCount, styles);

            currentRow++; // 空行

            // 3. 创建液体吸收时间部分
            CreateForm1Section(sheet, ref currentRow, sampleCount, dataTable1, styles);

            currentRow++; // 空行

            // 4. 创建液体吸收量部分
            CreateForm2Section(sheet, ref currentRow, sampleCount, dataTable2, styles);

            currentRow++; // 空行

            // 5. 创建液体芯吸速率部分
            CreateForm3Section(sheet, ref currentRow, sampleCount, dataTable3, styles);

            // 设置列宽
            sheet.SetColumnWidth(0, 20 * 256);
            for (int i = 1; i <= sampleCount * 3; i++)
            {
                sheet.SetColumnWidth(i, 12 * 256);
            }
        }

        private void CreateInfoSection(ISheet sheet, ref int currentRow, int sampleCount, 
            (ICellStyle titleStyle, ICellStyle headerStyle, ICellStyle dataStyle, ICellStyle yellowStyle) styles)
        {
            // 从界面获取实际数据
            string sampleName = textBox1.Text.Trim();
            string materialCode = textBox2.Text.Trim();
            string batchNumber = textBox3.Text.Trim();
            string operatorName = textBox4.Text.Trim();
            string instrument = textBox5.Text.Trim();
            string deviceNumber = textBox6.Text.Trim();
            string testTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
            
            // 第一行信息
            IRow infoRow1 = sheet.CreateRow(currentRow++);
            infoRow1.Height = 400;

            // 样品名称
            ICell cell1 = infoRow1.CreateCell(0);
            cell1.SetCellValue("样品名称:");
            cell1.CellStyle = styles.dataStyle;
            
            ICell cell2 = infoRow1.CreateCell(1);
            cell2.SetCellValue(string.IsNullOrEmpty(sampleName) ? "" : sampleName);
            cell2.CellStyle = styles.yellowStyle;
            // 为合并区域的所有单元格设置样式
            infoRow1.CreateCell(2).CellStyle = styles.yellowStyle;
            sheet.AddMergedRegion(new CellRangeAddress(currentRow - 1, currentRow - 1, 1, 2));

            // 物料编码
            ICell cell3 = infoRow1.CreateCell(3);
            cell3.SetCellValue("物料编码:");
            cell3.CellStyle = styles.dataStyle;
            
            ICell cell4 = infoRow1.CreateCell(4);
            cell4.SetCellValue(string.IsNullOrEmpty(materialCode) ? "" : materialCode);
            cell4.CellStyle = styles.yellowStyle;
            // 为合并区域的所有单元格设置样式
            infoRow1.CreateCell(5).CellStyle = styles.yellowStyle;
            sheet.AddMergedRegion(new CellRangeAddress(currentRow - 1, currentRow - 1, 4, 5));

            // 批号
            ICell cell5 = infoRow1.CreateCell(6);
            cell5.SetCellValue("批号:");
            cell5.CellStyle = styles.dataStyle;
            
            ICell cell6 = infoRow1.CreateCell(7);
            cell6.SetCellValue(string.IsNullOrEmpty(batchNumber) ? "" : batchNumber);
            cell6.CellStyle = styles.yellowStyle;

            // 操作人员
            ICell cell7 = infoRow1.CreateCell(8);
            cell7.SetCellValue("操作人员:");
            cell7.CellStyle = styles.dataStyle;
            
            ICell cell8 = infoRow1.CreateCell(9);
            cell8.SetCellValue(string.IsNullOrEmpty(operatorName) ? "" : operatorName);
            cell8.CellStyle = styles.yellowStyle;

            // 第二行信息
            IRow infoRow2 = sheet.CreateRow(currentRow++);
            infoRow2.Height = 400;

            // 测试时间
            ICell cell21 = infoRow2.CreateCell(0);
            cell21.SetCellValue("测试时间:");
            cell21.CellStyle = styles.dataStyle;
            
            ICell cell22 = infoRow2.CreateCell(1);
            cell22.SetCellValue(testTime);
            cell22.CellStyle = styles.yellowStyle;
            // 为合并区域的所有单元格设置样式
            infoRow2.CreateCell(2).CellStyle = styles.yellowStyle;
            sheet.AddMergedRegion(new CellRangeAddress(currentRow - 1, currentRow - 1, 1, 2));

            // 仪器
            ICell cell23 = infoRow2.CreateCell(3);
            cell23.SetCellValue("仪器:");
            cell23.CellStyle = styles.dataStyle;
            
            ICell cell24 = infoRow2.CreateCell(4);
            cell24.SetCellValue(string.IsNullOrEmpty(instrument) ? "" : instrument);
            cell24.CellStyle = styles.yellowStyle;
            // 为合并区域的所有单元格设置样式
            infoRow2.CreateCell(5).CellStyle = styles.yellowStyle;
            sheet.AddMergedRegion(new CellRangeAddress(currentRow - 1, currentRow - 1, 4, 5));

            // 设备编号
            ICell cell25 = infoRow2.CreateCell(6);
            cell25.SetCellValue("设备编号:");
            cell25.CellStyle = styles.dataStyle;
            
            ICell cell26 = infoRow2.CreateCell(7);
            cell26.SetCellValue(string.IsNullOrEmpty(deviceNumber) ? "" : deviceNumber);
            cell26.CellStyle = styles.yellowStyle;

            // 数据文件
            ICell cell27 = infoRow2.CreateCell(8);
            cell27.SetCellValue("数据文件:");
            cell27.CellStyle = styles.dataStyle;
            
            ICell cell28 = infoRow2.CreateCell(9);
            cell28.SetCellValue("(报告保存路径)");
            cell28.CellStyle = styles.yellowStyle;
        }

        private void CreateForm1Section(ISheet sheet, ref int currentRow, int sampleCount, DataTable dataTable,
            (ICellStyle titleStyle, ICellStyle headerStyle, ICellStyle dataStyle, ICellStyle yellowStyle) styles)
        {
            // 子标题
            IRow subtitleRow = sheet.CreateRow(currentRow++);
            subtitleRow.Height = 500;
            ICell subtitleCell = subtitleRow.CreateCell(0);
            subtitleCell.SetCellValue("液体吸收时间");
            subtitleCell.CellStyle = styles.headerStyle;
            // 为合并区域的所有单元格设置样式
            for (int i = 1; i <= sampleCount; i++)
            {
                subtitleRow.CreateCell(i).CellStyle = styles.headerStyle;
            }
            sheet.AddMergedRegion(new CellRangeAddress(currentRow - 1, currentRow - 1, 0, sampleCount));

            // 表头
            IRow headerRow = sheet.CreateRow(currentRow++);
            headerRow.Height = 400;
            ICell seqCell = headerRow.CreateCell(0);
            seqCell.SetCellValue("序号");
            seqCell.CellStyle = styles.headerStyle;

            for (int i = 1; i <= sampleCount; i++)
            {
                ICell cell = headerRow.CreateCell(i);
                cell.SetCellValue($"试样{i}");
                cell.CellStyle = styles.headerStyle;
            }

            // 数据行
            if (dataTable != null && dataTable.Rows.Count > 0)
            {
                foreach (DataRow dataRow in dataTable.Rows)
                {
                    string rowName = dataRow["序号"]?.ToString() ?? "";
                    if (string.IsNullOrEmpty(rowName)) continue;

                    IRow row = sheet.CreateRow(currentRow++);
                    row.Height = 380;

                    ICell nameCell = row.CreateCell(0);
                    nameCell.SetCellValue(rowName);
                    nameCell.CellStyle = styles.dataStyle;

                    // 如果是平均时间行，只显示一个合并的单元格
                    if (rowName.Contains("平均"))
                    {
                        ICell avgCell = row.CreateCell(1);
                        if (dataTable.Columns.Contains("试样1") && dataRow["试样1"] != DBNull.Value)
                        {
                            if (double.TryParse(dataRow["试样1"].ToString(), out double value))
                            {
                                avgCell.SetCellValue(value);
                            }
                            else
                            {
                                avgCell.SetCellValue("");
                            }
                        }
                        else
                        {
                            avgCell.SetCellValue("");
                        }
                        avgCell.CellStyle = styles.yellowStyle;
                        
                        // 为合并区域的其他单元格设置样式
                        for (int i = 2; i <= sampleCount; i++)
                        {
                            row.CreateCell(i).CellStyle = styles.yellowStyle;
                        }
                        // 合并平均时间单元格
                        sheet.AddMergedRegion(new CellRangeAddress(currentRow - 1, currentRow - 1, 1, sampleCount));
                    }
                    else
                    {
                        // 普通数据行，显示每个试样的数据
                        for (int i = 1; i <= sampleCount; i++)
                        {
                            ICell cell = row.CreateCell(i);
                            if (dataTable.Columns.Contains($"试样{i}") && dataRow[$"试样{i}"] != DBNull.Value)
                            {
                                if (double.TryParse(dataRow[$"试样{i}"].ToString(), out double value))
                                {
                                    cell.SetCellValue(value);
                                }
                                else
                                {
                                    cell.SetCellValue("");
                                }
                            }
                            else
                            {
                                cell.SetCellValue("");
                            }
                            cell.CellStyle = styles.yellowStyle;
                        }
                    }
                }
            }
        }

        private void CreateForm2Section(ISheet sheet, ref int currentRow, int sampleCount, DataTable dataTable,
            (ICellStyle titleStyle, ICellStyle headerStyle, ICellStyle dataStyle, ICellStyle yellowStyle) styles)
        {
            // 子标题
            IRow subtitleRow = sheet.CreateRow(currentRow++);
            subtitleRow.Height = 500;
            ICell subtitleCell = subtitleRow.CreateCell(0);
            subtitleCell.SetCellValue("液体吸收量");
            subtitleCell.CellStyle = styles.headerStyle;
            // 为合并区域的所有单元格设置样式
            for (int i = 1; i <= sampleCount; i++)
            {
                subtitleRow.CreateCell(i).CellStyle = styles.headerStyle;
            }
            sheet.AddMergedRegion(new CellRangeAddress(currentRow - 1, currentRow - 1, 0, sampleCount));

            // 表头
            IRow headerRow = sheet.CreateRow(currentRow++);
            headerRow.Height = 400;
            ICell seqCell = headerRow.CreateCell(0);
            seqCell.SetCellValue("序号");
            seqCell.CellStyle = styles.headerStyle;

            for (int i = 1; i <= sampleCount; i++)
            {
                ICell cell = headerRow.CreateCell(i);
                cell.SetCellValue($"试样{i}");
                cell.CellStyle = styles.headerStyle;
            }

            // 数据行
            if (dataTable != null && dataTable.Rows.Count > 0)
            {
                foreach (DataRow dataRow in dataTable.Rows)
                {
                    string rowName = dataRow["序号"]?.ToString() ?? "";
                    if (string.IsNullOrEmpty(rowName)) continue;

                    IRow row = sheet.CreateRow(currentRow++);
                    row.Height = 380;

                    ICell nameCell = row.CreateCell(0);
                    nameCell.SetCellValue(rowName);
                    nameCell.CellStyle = styles.dataStyle;

                    // 判断是否是需要合并的行（平均值、最大值、标准偏差）
                    bool isMergedRow = rowName.Contains("平均值") || rowName.Contains("最大值") || rowName.Contains("标准偏差");

                    if (isMergedRow)
                    {
                        // 合并为一列，只显示第一个试样的值
                        ICell valueCell = row.CreateCell(1);
                        if (dataTable.Columns.Contains("试样1") && dataRow["试样1"] != DBNull.Value)
                        {
                            object value = dataRow["试样1"];
                            if (value != null && double.TryParse(value.ToString(), out double numValue))
                            {
                                valueCell.SetCellValue(numValue);
                            }
                            else
                            {
                                valueCell.SetCellValue("");
                            }
                        }
                        else
                        {
                            valueCell.SetCellValue("");
                        }
                        valueCell.CellStyle = styles.yellowStyle;
                        
                        // 为合并区域的其他单元格设置样式
                        for (int i = 2; i <= sampleCount; i++)
                        {
                            row.CreateCell(i).CellStyle = styles.yellowStyle;
                        }
                        // 合并单元格
                        sheet.AddMergedRegion(new CellRangeAddress(currentRow - 1, currentRow - 1, 1, sampleCount));
                    }
                    else
                    {
                        // 普通数据行，显示每个试样的数据
                        for (int i = 1; i <= sampleCount; i++)
                        {
                            ICell cell = row.CreateCell(i);
                            if (dataTable.Columns.Contains($"试样{i}") && dataRow[$"试样{i}"] != DBNull.Value)
                            {
                                object value = dataRow[$"试样{i}"];
                                if (value != null)
                                {
                                    // 尝试转换为 double
                                    if (double.TryParse(value.ToString(), out double numValue))
                                    {
                                        cell.SetCellValue(numValue);
                                    }
                                    else
                                    {
                                        // 如果不是数字，直接显示字符串值
                                        cell.SetCellValue(value.ToString());
                                    }
                                }
                                else
                                {
                                    cell.SetCellValue("");
                                }
                            }
                            else
                            {
                                cell.SetCellValue("");
                            }
                            cell.CellStyle = styles.yellowStyle;
                        }
                    }
                }
            }
        }

        private void CreateForm3Section(ISheet sheet, ref int currentRow, int sampleCount, DataTable dataTable,
            (ICellStyle titleStyle, ICellStyle headerStyle, ICellStyle dataStyle, ICellStyle yellowStyle) styles)
        {
            // 子标题
            IRow subtitleRow = sheet.CreateRow(currentRow++);
            subtitleRow.Height = 500;
            ICell subtitleCell = subtitleRow.CreateCell(0);
            subtitleCell.SetCellValue("液体芯吸速率");
            subtitleCell.CellStyle = styles.headerStyle;
            // 为合并区域的所有单元格设置样式
            for (int i = 1; i <= sampleCount * 3; i++)
            {
                subtitleRow.CreateCell(i).CellStyle = styles.headerStyle;
            }
            sheet.AddMergedRegion(new CellRangeAddress(currentRow - 1, currentRow - 1, 0, sampleCount * 3));

            // 第一行表头（纵向/横向）
            IRow headerRow1 = sheet.CreateRow(currentRow);
            headerRow1.Height = 400;
            ICell seqCell1 = headerRow1.CreateCell(0);
            seqCell1.SetCellValue("序号");
            seqCell1.CellStyle = styles.headerStyle;

            ICell dirCell = headerRow1.CreateCell(1);
            dirCell.SetCellValue("纵向/横向（选择按钮）");
            dirCell.CellStyle = styles.headerStyle;
            // 为合并区域的所有单元格设置样式
            for (int i = 2; i <= sampleCount * 3; i++)
            {
                headerRow1.CreateCell(i).CellStyle = styles.headerStyle;
            }
            sheet.AddMergedRegion(new CellRangeAddress(currentRow, currentRow, 1, sampleCount * 3));

            currentRow++;

            // 第二行表头（试样1-N，每个3列）
            IRow headerRow2 = sheet.CreateRow(currentRow);
            headerRow2.Height = 400;
            
            // 序号列在第二行也需要创建并设置样式（用于合并）
            headerRow2.CreateCell(0).CellStyle = styles.headerStyle;

            int colIndex = 1;
            for (int i = 1; i <= sampleCount; i++)
            {
                ICell cell = headerRow2.CreateCell(colIndex);
                cell.SetCellValue($"试样{i}");
                cell.CellStyle = styles.headerStyle;
                // 为合并区域的所有单元格设置样式
                headerRow2.CreateCell(colIndex + 1).CellStyle = styles.headerStyle;
                headerRow2.CreateCell(colIndex + 2).CellStyle = styles.headerStyle;
                sheet.AddMergedRegion(new CellRangeAddress(currentRow, currentRow, colIndex, colIndex + 2));
                colIndex += 3;
            }
            
            // 合并序号列（跨两行）
            sheet.AddMergedRegion(new CellRangeAddress(currentRow - 1, currentRow, 0, 0));

            currentRow++;

            // 第三行表头（1、2、3）
            IRow headerRow3 = sheet.CreateRow(currentRow++);
            headerRow3.Height = 400;

            colIndex = 1;
            for (int i = 1; i <= sampleCount; i++)
            {
                for (int j = 1; j <= 3; j++)
                {
                    ICell cell = headerRow3.CreateCell(colIndex++);
                    cell.SetCellValue(j.ToString());
                    cell.CellStyle = styles.headerStyle;
                }
            }

            // 数据行
            if (dataTable != null && dataTable.Rows.Count > 0)
            {
                foreach (DataRow dataRow in dataTable.Rows)
                {
                    string rowName = dataRow["序号"]?.ToString() ?? "";
                    if (string.IsNullOrEmpty(rowName)) continue;

                    IRow row = sheet.CreateRow(currentRow++);
                    row.Height = 380;

                    ICell nameCell = row.CreateCell(0);
                    nameCell.SetCellValue(rowName);
                    nameCell.CellStyle = styles.dataStyle;

                    // 判断是否是标准偏差行（需要合并为一列）
                    bool isStdDeviationRow = rowName.Contains("标准偏差");

                    if (isStdDeviationRow)
                    {
                        // 标准偏差行：合并为一列，只显示第一个值
                        ICell valueCell = row.CreateCell(1);
                        string columnName = "试样1_1";
                        if (dataTable.Columns.Contains(columnName) && dataRow[columnName] != DBNull.Value)
                        {
                            if (double.TryParse(dataRow[columnName].ToString(), out double value))
                            {
                                if (Math.Abs(value) >= 0.001)
                                {
                                    valueCell.SetCellValue(value);
                                }
                                else
                                {
                                    valueCell.SetCellValue("");
                                }
                            }
                            else
                            {
                                valueCell.SetCellValue("");
                            }
                        }
                        else
                        {
                            valueCell.SetCellValue("");
                        }
                        valueCell.CellStyle = styles.yellowStyle;
                        
                        // 为合并区域的其他单元格设置样式
                        for (int i = 2; i <= sampleCount * 3; i++)
                        {
                            row.CreateCell(i).CellStyle = styles.yellowStyle;
                        }
                        // 合并单元格
                        sheet.AddMergedRegion(new CellRangeAddress(currentRow - 1, currentRow - 1, 1, sampleCount * 3));
                    }
                    else
                    {
                        // 普通数据行：显示每个试样的每次测试数据
                        colIndex = 1;
                        for (int i = 1; i <= sampleCount; i++)
                        {
                            for (int j = 1; j <= 3; j++)
                            {
                                ICell cell = row.CreateCell(colIndex++);
                                string columnName = $"试样{i}_{j}";
                                
                                if (dataTable.Columns.Contains(columnName) && dataRow[columnName] != DBNull.Value)
                                {
                                    if (double.TryParse(dataRow[columnName].ToString(), out double value))
                                    {
                                        if (Math.Abs(value) >= 0.001)
                                        {
                                            cell.SetCellValue(value);
                                        }
                                        else
                                        {
                                            // 所有空数据都显示为空白
                                            cell.SetCellValue("");
                                        }
                                    }
                                    else
                                    {
                                        // 所有空数据都显示为空白
                                        cell.SetCellValue("");
                                    }
                                }
                                else
                                {
                                    // 所有空数据都显示为空白
                                    cell.SetCellValue("");
                                }
                                cell.CellStyle = styles.yellowStyle;
                            }
                        }
                    }
                }
            }
        }

        private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            clockTimer?.Stop();
            clockTimer?.Dispose();
            Application.Exit();
        }

        private (ICellStyle titleStyle, ICellStyle headerStyle, ICellStyle dataStyle, ICellStyle yellowStyle)
            CreateReportStyles(IWorkbook workbook)
        {
            // 标题样式
            ICellStyle titleStyle = workbook.CreateCellStyle();
            IFont titleFont = workbook.CreateFont();
            titleFont.FontHeightInPoints = 16;
            titleFont.IsBold = true;
            titleStyle.SetFont(titleFont);
            titleStyle.Alignment = NPOIHorizontalAlignment.Center;
            titleStyle.VerticalAlignment = VerticalAlignment.Center;

            // 表头样式（灰色背景）
            ICellStyle headerStyle = workbook.CreateCellStyle();
            headerStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.Grey25Percent.Index;
            headerStyle.FillPattern = FillPattern.SolidForeground;
            SetBorders(headerStyle);
            IFont headerFont = workbook.CreateFont();
            headerFont.IsBold = true;
            headerStyle.SetFont(headerFont);
            headerStyle.Alignment = NPOIHorizontalAlignment.Center;
            headerStyle.VerticalAlignment = VerticalAlignment.Center;

            // 数据样式（白色背景）
            ICellStyle dataStyle = workbook.CreateCellStyle();
            SetBorders(dataStyle);
            dataStyle.Alignment = NPOIHorizontalAlignment.Center;
            dataStyle.VerticalAlignment = VerticalAlignment.Center;

            // 黄色背景样式
            ICellStyle yellowStyle = workbook.CreateCellStyle();
            yellowStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.LightYellow.Index;
            yellowStyle.FillPattern = FillPattern.SolidForeground;
            SetBorders(yellowStyle);
            yellowStyle.Alignment = NPOIHorizontalAlignment.Center;
            yellowStyle.VerticalAlignment = VerticalAlignment.Center;

            return (titleStyle, headerStyle, dataStyle, yellowStyle);
        }

        private void SetBorders(ICellStyle style)
        {
            style.BorderBottom = NPOIBorderStyle.Thin;
            style.BorderTop = NPOIBorderStyle.Thin;
            style.BorderLeft = NPOIBorderStyle.Thin;
            style.BorderRight = NPOIBorderStyle.Thin;
        }
    }
}