C#代码实现在Excel中高亮显示最高值和最低值

PM> Install-Package Spire.XLS

using Spire.Xls;
using Spire.Xls.Core;
using Spire.Xls.Core.Spreadsheet.Collections;
using System.Drawing;

namespace HighlightValues
{
    class Program
    {
        static void Main(string[] args)
        {
            // 创建 Workbook 实例
            Workbook workbook = new Workbook();

            // 加载示例 Excel 文档
            workbook.LoadFromFile("sample.xlsx");

            // 获取第一个工作表
            Worksheet sheet = workbook.Worksheets[0];

            // 添加条件格式
            XlsConditionalFormats format = sheet.ConditionalFormats.Add();

            // 设置条件格式应用的单元格区域
            format.AddRange(sheet.Range["B2:F7"]);

            // 添加“前 1 个值”条件，并设置背景颜色为红色
            IConditionalFormat condition1 = format.AddTopBottomCondition(TopBottomType.Top, 1);
            condition1.BackColor = Color.Red;

            // 添加“后 2 个值”条件，并设置背景颜色为森林绿色
            IConditionalFormat condition2 = format.AddTopBottomCondition(TopBottomType.Bottom, 2);
            condition2.BackColor = Color.ForestGreen;

            // 保存结果文档
            workbook.SaveToFile("TopBottomValues.xlsx", ExcelVersion.Version2013);
        }
    }
}

Install-Package EPPlus

using OfficeOpenXml;
using OfficeOpenXml.Style;
using System.Drawing;
using System.IO;
using System.Linq;
class Program
{
    static void Main()
    {
        // 设置许可证（非商业用途）
        ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
        string filePath = @"C:\Temp\Data.xlsx";
        string sheetName = "Sheet1";
        string rangeAddress = "A1:A100"; // 要分析的数据范围
        using (var package = new ExcelPackage(new FileInfo(filePath)))
        {
            var worksheet = package.Workbook.Worksheets[sheetName];
            if (worksheet == null)
            {
                System.Console.WriteLine("工作表不存在");
                return;
            }
            // 获取指定范围的单元格
            var range = worksheet.Cells[rangeAddress];
            // 读取数值（跳过非数字或空值）
            var values = range
                .Select(cell => cell.Value)
                .Where(v => v != null && double.TryParse(v.ToString(), out _))
                .Select(v => Convert.ToDouble(v))
                .ToList();
            if (values.Count == 0)
            {
                System.Console.WriteLine("未找到数字数据");
                return;
            }
            double max = values.Max();
            double min = values.Min();
            // 遍历范围内的所有单元格，匹配最大值和最小值
            foreach (var cell in range)
            {
                if (cell.Value != null && double.TryParse(cell.Value.ToString(), out double num))
                {
                    if (num == max)
                    {
                        // 高亮最大值（绿色背景）
                        cell.Style.Fill.PatternType = ExcelFillStyle.Solid;
                        cell.Style.Fill.BackgroundColor.SetColor(Color.LightGreen);
                        // 可选：设置字体颜色
                        cell.Style.Font.Color.SetColor(Color.DarkGreen);
                    }
                    else if (num == min)
                    {
                        // 高亮最小值（红色背景）
                        cell.Style.Fill.PatternType = ExcelFillStyle.Solid;
                        cell.Style.Fill.BackgroundColor.SetColor(Color.LightPink);
                        cell.Style.Font.Color.SetColor(Color.DarkRed);
                    }
                }
            }
            // 保存文件
            package.Save();
            System.Console.WriteLine("高亮完成！");
        }
    }
}

using OfficeOpenXml;
using OfficeOpenXml.ConditionalFormatting;
using OfficeOpenXml.Style;
using System.Drawing;
using System.IO;
class Program
{
    static void Main()
    {
        ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
        string filePath = @"C:\Temp\Data.xlsx";
        string sheetName = "Sheet1";
        string rangeAddress = "A1:A100";
        using (var package = new ExcelPackage(new FileInfo(filePath)))
        {
            var worksheet = package.Workbook.Worksheets[sheetName];
            if (worksheet == null) return;
            var range = worksheet.Cells[rangeAddress];
            // 清除已有条件格式（可选）
            worksheet.ConditionalFormatting.RemoveAll();
            // 添加最大值条件格式（绿色背景）
            var maxRule = worksheet.ConditionalFormatting.AddTop(worksheet.Cells[rangeAddress]);
            maxRule.Priority = 1;
            maxRule.StopIfTrue = false;
            maxRule.Rank = 1;  // 前1项（最大值）
            maxRule.Style.Fill.PatternType = ExcelFillStyle.Solid;
            maxRule.Style.Fill.BackgroundColor.Color = Color.LightGreen;
            maxRule.Style.Font.Color.Color = Color.DarkGreen;
            // 添加最小值条件格式（红色背景）
            // 使用 Bottom 规则，Rank=1 表示最小值
            var minRule = worksheet.ConditionalFormatting.AddBottom(worksheet.Cells[rangeAddress]);
            minRule.Priority = 2;
            minRule.StopIfTrue = false;
            minRule.Rank = 1;
            minRule.Style.Fill.PatternType = ExcelFillStyle.Solid;
            minRule.Style.Fill.BackgroundColor.Color = Color.LightPink;
            minRule.Style.Font.Color.Color = Color.DarkRed;
            package.Save();
            System.Console.WriteLine("条件格式添加完成！");
        }
    }
}