使用C#格式化Excel表格。该样式应用于所有单元格，而不是一个单元格

using OfficeOpenXml;
using OfficeOpenXml.Style;

ExcelPackage.LicenseContext = LicenseContext.NonCommercial; // 设置EPPlus许可证上下文
using (ExcelPackage excelPackage = new ExcelPackage())
{
    ExcelWorksheet worksheet = excelPackage.Workbook.Worksheets.Add("Sheet1");
    // 添加数据和格式化
    // ...
    // 保存Excel文件
    excelPackage.SaveAs(new FileInfo("path/to/excel/file.xlsx"));
}

// 设置所有单元格的样式
worksheet.Cells.Style.Font.Name = "Arial";
worksheet.Cells.Style.Font.Size = 12;
worksheet.Cells.Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
worksheet.Cells.Style.VerticalAlignment = ExcelVerticalAlignment.Center;

// 设置边框样式
worksheet.Cells.Style.Border.Top.Style = ExcelBorderStyle.Thin;
worksheet.Cells.Style.Border.Bottom.Style = ExcelBorderStyle.Thin;
worksheet.Cells.Style.Border.Left.Style = ExcelBorderStyle.Thin;
worksheet.Cells.Style.Border.Right.Style = ExcelBorderStyle.Thin;

// 设置背景颜色
worksheet.Cells.Style.Fill.PatternType = ExcelFillStyle.Solid;
worksheet.Cells.Style.Fill.BackgroundColor.SetColor(Color.LightGray);

// 设置文本格式
worksheet.Cells.Style.Numberformat.Format = "@";

// 添加数据
worksheet.Cells["A1"].Value = "Hello";
worksheet.Cells["B1"].Value = "World";

// 自动调整列宽
worksheet.Cells.AutoFitColumns();

excelPackage.SaveAs(new FileInfo("path/to/excel/file.xlsx"));