提供一个使用Npoi生成excel文档的例子，应能帮助到各位使用Npoi的朋友，因为具有多种情形处理

 

照例，文章开始之前，先看下最终效果：

实现的需求点如下：
1.第一行大标题加了背景色，且这个背景色，不在常用的颜色范围中，需要自定义。同时标题的字体大小要进行变化。
2.第二行的表格信息是单独的，每一项信息对应一个单元格给它填写值。如线体，然后跟着一个单元格给它写值。
3.第三行，要实现单元格合并。且根据单元格的文字多少，自适应文档的单元格宽度范围。
4.第四行，从第4行开始，就是填充表格数据了。要注意的是跟第3行一样，要合并单元格。
5.要冻结“点检状态”的单元格位置。
6.第1行的高度要最高，第2行的高度要次之，第3行的高度再次之，第4行用excel的默认高度。
7.单元格实现黑色边框。

由于代码注释已经很详细了，所以，我就直接贴上完整代码，就不啰唆了，我知道，读者其实也不想看我放屁，你们只想要源码，而且还不想放在下载中（因为那个要积分要钱）。

那么好的，来了（NPOI用的版本是2.6.0）：

using System;
using System.Collections.Generic;
using System.IO;
using NPOI.SS.UserModel;
using NPOI.SS.Util;
using NPOI.XSSF.UserModel;
using NPOI.HSSF.Util;

using static EquipmentInspectionExcelGenerator;
using SixLabors.ImageSharp;

/// <summary>
/// 用于设备点检数据的Excel生成
/// </summary>
public class EquipmentInspectionExcelGenerator
{
    /// <inheritdoc cref="EquipmentInspectionExcelGenerator"/>
    public EquipmentInspectionExcelGenerator() { }

    /// <summary>
    /// 点检信息
    /// </summary>
    public class InspectionInformation
    {
        /// <summary>
        /// 线体
        /// </summary>
        public string LineBody { get; set; }
        /// <summary>
        /// 工序名称
        /// </summary>
        public string ProcessName { get; set; }
        /// <summary>
        /// 设备编号
        /// </summary>
        public string EquipmentNumber { get; set; }
        /// <summary>
        /// 开机人员
        /// </summary>
        public string Operator { get; set; }
        /// <summary>
        /// 日期
        /// </summary>
        public string Date { get; set; }
        /// <summary>
        /// 班次
        /// </summary>
        public string Shift { get; set; }
        /// <summary>
        /// 点检项目数
        /// </summary>
        public string InspectionItemCount { get; set; }
        /// <summary>
        /// NG项目数
        /// </summary>
        public string NGItemCount { get; set; }
    }

    /// <summary>
    /// 点检项目
    /// </summary>
    public class InspectionData
    {
        /// <summary>
        /// 功能
        /// </summary>
        public string Functionality { get; set; }
        /// <summary>
        /// 生产时状态要求
        /// </summary>
        public string ProductionStatusRequirements { get; set; }
        /// <summary>
        /// 不符合要求设备反应计划
        /// </summary>
        public string NoncomplianceReactionPlan { get; set; }
        /// <summary>
        /// 点检状态
        /// </summary>
        public string InspectionStatus { get; set; }
        /// <summary>
        /// 判定结果
        /// </summary>
        public string JudgmentResult { get; set; }
        /// <summary>
        /// 点检时间
        /// </summary>
        public string InspectionTime { get; set; }
        /// <summary>
        /// 反应计划
        /// </summary>
        public string ReactionPlan { get; set; }
        /// <summary>
        /// 当班点检次数
        /// </summary>
        public string InspectionCount { get; set; }
    }

    /// <summary>
    /// 生成excel
    /// </summary>
    /// <param name="filePath">存储路径</param>
    /// <param name="information"><inheritdoc cref="InspectionInformation" path="/summary"/></param>
    /// <param name="datas"><inheritdoc cref="InspectionData" path="/summary"/></param>
    public void GenerateExcel(string filePath, InspectionInformation information, List<InspectionData> datas)
    {
        if (string.IsNullOrEmpty(filePath))
        {
            throw new ArgumentException("filePath is required", nameof(filePath));
        }
        if (information == null)
        {
            throw new ArgumentNullException("information is required", nameof(information));
        }
        if (datas == null)
        {
            throw new ArgumentNullException("datas is required", nameof(datas));
        }

        // 创建Excel工作簿
        IWorkbook workbook = new XSSFWorkbook();
        ISheet sheet = workbook.CreateSheet("设备功能开关点检表格");

        // 设置第1行的表头，合并16列并居中显示
        IRow row1 = sheet.CreateRow(0);
        row1.Height = Convert.ToInt16(row1.Height * 2.5);

        IFont headerFont = workbook.CreateFont();
        headerFont.FontHeightInPoints = 18;  // 设置字体大小
        headerFont.IsBold = true; // 设置字体加粗

        ICell cell1 = row1.CreateCell(0);
        var headerCellStyle = CreateHeaderCellStyle(workbook);
        headerCellStyle.SetFont(headerFont);
        cell1.CellStyle = headerCellStyle;
        cell1.SetCellValue("设备功能开关点检表格");
        sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, 15));

        // 设置第2行的列标题
        IRow row2 = sheet.CreateRow(1);
        row2.Height = Convert.ToInt16(row2.Height * 2);

        IFont columnHeaderFont = workbook.CreateFont();
        columnHeaderFont.IsBold = true; // 设置字体加粗

        string[] columnHeaders = new string[]
        {
            "线体", information.LineBody, "工序名称", information.ProcessName, "设备编号", information.EquipmentNumber, "开机人员", information.Operator, "日期", information.Date, "班次", information.Shift, "点检项目数", information.InspectionItemCount, "NG项目数", information.NGItemCount
        };
        for (int i = 0; i < columnHeaders.Length; i++)
        {
            ICell cell = row2.CreateCell(i);
            var columnHeaderCellStyle = CreateColumnHeaderCellStyle(workbook);
            if (i % 2 == 0)
            {
                columnHeaderCellStyle.SetFont(columnHeaderFont);
            }
            cell.CellStyle = columnHeaderCellStyle;
            cell.SetCellValue(columnHeaders[i]);
            sheet.SetColumnWidth(i, 200 * 15); // 设置列宽自适应内容
        }

        // 设置第3行的列标题
        IRow row3 = sheet.CreateRow(2);
        row3.Height = Convert.ToInt16(row3.Height * 1.6);
        string[] subColumnHeaders = new string[]
        {
            "序号", "功能", "", "生产时状态要求", "", "不符合要求设备反应计划", "", "点检状态", "", "判定结果", "", "点检时间", "",
            "反应计划", "", "当班点检次数"
        };
        for (int i = 0; i < subColumnHeaders.Length; i++)
        {
            ICell cell = row3.CreateCell(i);
            cell.CellStyle = CreateColumnHeaderCellStyle(workbook);
            cell.SetCellValue(subColumnHeaders[i]);
        }

        // 循环设置数据
        for (var i = 0; i < datas.Count; i++)
        {
            var data = datas[i];
            IRow dataRow = sheet.CreateRow(i + 3);
            dataRow.Height = Convert.ToInt16(dataRow.Height * 1.2);
            string[] values = new string[]
                {
                    (i+1).ToString(),
                    data.Functionality,
                    string.Empty,
                    data.ProductionStatusRequirements,
                    string.Empty,
                    data.NoncomplianceReactionPlan,
                    string.Empty,
                    data.InspectionStatus,
                    string.Empty,
                    data.JudgmentResult,
                    string.Empty,
                    data.InspectionTime,
                    string.Empty,
                    data.ReactionPlan,
                    string.Empty,
                    data.InspectionCount,
                };
            for (int j = 0; j < values.Length; j++)
            {
                ICell cell = dataRow.CreateCell(j);
                cell.CellStyle = CreateCellStyle(workbook);
                cell.SetCellValue(values[j]);
            }
        }

        // 合并单元格
        int rowCount = sheet.LastRowNum + 1;
        for (int i = 2; i < rowCount; i++)
        {
            sheet.AddMergedRegion(new CellRangeAddress(i, i, 1, 2));
            sheet.AddMergedRegion(new CellRangeAddress(i, i, 3, 4));
            sheet.AddMergedRegion(new CellRangeAddress(i, i, 5, 6));
            sheet.AddMergedRegion(new CellRangeAddress(i, i, 7, 8));
            sheet.AddMergedRegion(new CellRangeAddress(i, i, 9, 10));
            sheet.AddMergedRegion(new CellRangeAddress(i, i, 11, 12));
            sheet.AddMergedRegion(new CellRangeAddress(i, i, 13, 14));
        }

        // 冻结“点检状态”列的位置
        sheet.CreateFreezePane(7, 2);

        // 保存Excel文件
        using (FileStream fileStream = new FileStream(filePath, FileMode.Create))
        {
            workbook.Write(fileStream, true);
        }
    }

    /// <summary>
    /// 创建表头样式
    /// </summary>
    /// <param name="workbook"></param>
    /// <returns></returns>
    private ICellStyle CreateHeaderCellStyle(IWorkbook workbook)
    {
        ICellStyle style = workbook.CreateCellStyle();
        //style.Alignment = HorizontalAlignment.Center;
        style.VerticalAlignment = VerticalAlignment.Center;
        style.FillForegroundColor = 0;// IndexedColors.Grey25Percent.Index;//Grey25Percent的颜色还是太深了。用自定义的颜色让他更淡些。
        style.FillPattern = FillPattern.SolidForeground;
        ((XSSFColor)style.FillForegroundColorColor).SetRgb(new byte[] { 242, 242, 242 });//自定义一个淡色
      
        style.BorderTop = BorderStyle.Thin;
        style.BorderBottom = BorderStyle.Thin;
        style.BorderLeft = BorderStyle.Thin;
        style.BorderRight = BorderStyle.Thin;

        style.TopBorderColor = IndexedColors.Black.Index;
        style.BottomBorderColor = IndexedColors.Black.Index;
        style.LeftBorderColor = IndexedColors.Black.Index;
        style.RightBorderColor = IndexedColors.Black.Index;


        return style;
    }

    /// <summary>
    /// 创建列头样式
    /// </summary>
    /// <param name="workbook"></param>
    /// <returns></returns>
    private ICellStyle CreateColumnHeaderCellStyle(IWorkbook workbook)
    {
        ICellStyle style = CreateCellStyle(workbook);
        style.FillForegroundColor = IndexedColors.Grey40Percent.Index;
        return style;
    }

    /// <summary>
    /// 创建单元格样式
    /// </summary>
    /// <param name="workbook"></param>
    /// <returns></returns>
    private ICellStyle CreateCellStyle(IWorkbook workbook)
    {
        ICellStyle style = workbook.CreateCellStyle();
        style.Alignment = HorizontalAlignment.Center;
        style.VerticalAlignment = VerticalAlignment.Center;
        style.BorderTop = BorderStyle.Thin;
        style.BorderBottom = BorderStyle.Thin;
        style.BorderLeft = BorderStyle.Thin;
        style.BorderRight = BorderStyle.Thin;

        style.TopBorderColor = IndexedColors.Black.Index;
        style.BottomBorderColor = IndexedColors.Black.Index;
        style.LeftBorderColor = IndexedColors.Black.Index;
        style.RightBorderColor = IndexedColors.Black.Index;

        return style;
    }
}

调用方式如下：

public class Example
{
    /// <summary>
    /// 请参照这个方法的调用代码，来进行调用
    /// </summary>
    public void 演示调用()
    {
        string filePath = @"C:\Users\Administrator\Desktop\excel.xlsx";
        InspectionInformation information = new InspectionInformation();
        information.LineBody = "JITA-003";
        information.ProcessName = "侧边涂胶";
        information.EquipmentNumber = "JIT02TM";
        information.Operator = "Marc";
        information.Date = "2023-5-29";
        information.Shift = "day shift";
        information.InspectionItemCount = "4";
        information.NGItemCount = "28";
        List<InspectionData> datas = new List<InspectionData>();
        datas.Add(new InspectionData
        {
            Functionality = "前段联机",
            ProductionStatusRequirements = "启用",
            NoncomplianceReactionPlan = "停机",
            InspectionStatus = "屏蔽",
            JudgmentResult = "NG",
            InspectionTime = "2023/4/21/8:34",
            ReactionPlan = "停机",
            InspectionCount = "2"
        });
        datas.Add(new InspectionData
        {
            Functionality = "后段联机",
            ProductionStatusRequirements = "启用",
            NoncomplianceReactionPlan = "停机",
            InspectionStatus = "屏蔽",
            JudgmentResult = "NG",
            InspectionTime = "2023/4/21/8:34",
            ReactionPlan = "停机",
            InspectionCount = "2"
        });
        datas.Add(new InspectionData
        {
            Functionality = "上位机联机",
            ProductionStatusRequirements = "启用",
            NoncomplianceReactionPlan = "停机",
            InspectionStatus = "屏蔽",
            JudgmentResult = "NG",
            InspectionTime = "2023/4/21/8:34",
            ReactionPlan = "停机",
            InspectionCount = "2"
        });
        datas.Add(new InspectionData
        {
            Functionality = "点胶门禁",
            ProductionStatusRequirements = "启用",
            NoncomplianceReactionPlan = "停机",
            InspectionStatus = "屏蔽",
            JudgmentResult = "NG",
            InspectionTime = "2023/4/21/8:34",
            ReactionPlan = "停机",
            InspectionCount = "2"
        });

        EquipmentInspectionExcelGenerator generator = new EquipmentInspectionExcelGenerator();
        generator.GenerateExcel(filePath, information, datas);
    }
}

祝您用餐愉快。