93 lines
4.0 KiB
C#
93 lines
4.0 KiB
C#
using OfficeOpenXml;
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using OfficeOpenXml.Style;
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.IO;
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using System.Reflection;
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namespace Syc.Basic.Web.WMS
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{
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public static class ExcelExporter
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{
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/// <summary>
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/// EPPlus 8.0+ 导出 List 数据为 Excel 内存流（带样式美化）
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/// </summary>
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/// <typeparam name="T">数据模型类型</typeparam>
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/// <param name="dataList">要导出的数据集合</param>
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/// <param name="sheetName">Excel 工作表名称</param>
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/// <param name="headerMap">自定义表头（key：模型属性名，value：Excel 表头文本）</param>
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/// <returns>Excel 内存流（需手动释放）</returns>
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public static string ExportToExcelStream<T>(
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List<T> dataList,
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string sheetName = "数据报表",
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string filePath = null,
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Dictionary<string, string> headerMap = null)
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{
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// 1. 配置 EPPlus 许可证（非商业用途，商业需购买许可证）
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//ExcelPackage.License = License.NonCommercial;
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// 2. 初始化 Excel 包和工作表
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using var package = new ExcelPackage();
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var worksheet = package.Workbook.Worksheets.Add(sheetName);
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// 3. 处理表头（支持自定义列名，无自定义则用模型属性名）
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PropertyInfo[] properties = typeof(T).GetProperties();
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int colIndex = 1;
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// 写入表头
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foreach (var prop in properties)
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{
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string headerText = headerMap?.ContainsKey(prop.Name) ?? false
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? headerMap[prop.Name]
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: prop.Name; // 优先用自定义表头，否则用属性名
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worksheet.Cells[1, colIndex].Value = headerText;
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colIndex++;
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}
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// 4. 写入数据（逐行逐列绑定）
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int rowIndex = 2; // 第1行是表头，从第2行开始写数据
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foreach (var data in dataList)
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{
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colIndex = 1;
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foreach (var prop in properties)
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{
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var value = prop.GetValue(data);
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// 特殊类型处理（避免日期/布尔值格式异常）
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switch (value)
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{
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case DateTime date:
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worksheet.Cells[rowIndex, colIndex].Value = date.ToString("yyyy-MM-dd HH:mm:ss");
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break;
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case bool b:
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worksheet.Cells[rowIndex, colIndex].Value = b ? "是" : "否";
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break;
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case decimal d:
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worksheet.Cells[rowIndex, colIndex].Value = d;
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worksheet.Cells[rowIndex, colIndex].Style.Numberformat.Format = "0.00"; // 金额保留2位小数
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break;
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default:
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worksheet.Cells[rowIndex, colIndex].Value = value ?? string.Empty;
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break;
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}
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colIndex++;
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}
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rowIndex++;
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}
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// 5. 样式美化（表头加粗+背景色、自动列宽）
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var headerRange = worksheet.Cells[1, 1, 1, properties.Length];
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headerRange.Style.Font.Bold = true; // 表头加粗
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headerRange.Style.Fill.PatternType = ExcelFillStyle.Solid;
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headerRange.Style.Fill.BackgroundColor.SetColor(System.Drawing.Color.LightSkyBlue); // 表头背景色
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worksheet.Cells[worksheet.Dimension.Address].AutoFitColumns(); // 自动调整所有列宽
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// 6. 保存到内存流并返回
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//var stream = new MemoryStream();
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package.SaveAs(filePath);
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// stream.Position = 0; // 重置流指针（关键：否则下载的文件为空）
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return filePath;
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}
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}
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}
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