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@@ -5777,6 +5777,399 @@ namespace OASystem.API.OAMethodLib
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#endregion
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#endregion
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+
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+ #region Excel导出服务
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+ #region 类
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+ public class FileExportSettings
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+ {
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+ public string ExportBasePath { get; set; } = "wwwroot/exports";
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+ public string DownloadBaseUrl { get; set; } = "/exports";
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+ public int RetentionDays { get; set; } = 7;
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+ public int MaxFileSizeMB { get; set; } = 50;
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+ public string ExcelTemplatesPath { get; set; } = "Templates/Excel";
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+ }
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+
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+ public class ExportResult
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+ {
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+ public bool Success { get; set; }
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+ public string FilePath { get; set; }
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+ public string DownloadUrl { get; set; }
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+ public string FileName { get; set; }
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+ public long FileSize { get; set; }
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+ public string MimeType { get; set; } = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
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+ public string ErrorMessage { get; set; }
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+ public DateTime GeneratedAt { get; set; } = DateTime.Now;
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+ }
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+
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+ public class ExportRequest
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+ {
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+ public IEnumerable<object> Data { get; set; }
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+ public string FileName { get; set; }
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+ public string SheetName { get; set; } = "Sheet1";
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+ public string TemplateType { get; set; } = "default";
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+ public Dictionary<string, string> CustomHeaders { get; set; }
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+ }
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+
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+ public class ExportResponse
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+ {
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+ public string FilePath { get; set; }
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+ public string DownloadUrl { get; set; }
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+ public string FileName { get; set; }
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+ public long FileSize { get; set; }
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+ public DateTime GeneratedAt { get; set; }
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+ public string Message { get; set; }
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+ }
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+ #endregion
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+
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+
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+
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+ public static async Task<ExportResult> ExportToExcel<T>(IEnumerable<T> data, string fileName, string sheetName = "Sheet1", string templateType = "default")
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+ {
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+ try
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+ {
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+ byte[] excelBytes = templateType.ToLower() switch
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+ {
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+ "styled" => GenerateStyledExcel(data, sheetName),
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+ "with_formulas" => GenerateExcelWithFormulas(data, sheetName),
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+ //"with_charts" => GenerateExcelWithCharts(data, sheetName),
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+ _ => GenerateDefaultExcel(data, sheetName)
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+ };
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+
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+ var filePath = await SaveFileAsync(excelBytes, fileName, "excel");
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+ var downloadUrl = $"wwwroot/exports/{filePath}";
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+
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+ return new ExportResult
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+ {
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+ Success = true,
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+ FilePath = filePath,
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+ DownloadUrl = downloadUrl,
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+ FileName = Path.GetFileName(filePath),
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+ FileSize = excelBytes.Length,
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+ MimeType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
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+ };
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+ }
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+ catch (Exception ex)
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+ {
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+ return new ExportResult
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+ {
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+ Success = false,
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+ ErrorMessage = ex.Message
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+ };
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+ }
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+ }
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+
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+ public static async Task<ExportResult> ExportWithTemplate<T>(IEnumerable<T> data, byte[] templateBytes, string fileName, string sheetName = "Sheet1")
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+ {
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+ try
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+ {
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+ using var templateStream = new MemoryStream(templateBytes);
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+ using var workbook = new Workbook(templateStream);
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+
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+ var worksheet = workbook.Worksheets[sheetName] ?? workbook.Worksheets[0];
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+
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+ // 查找数据起始行（可以根据模板中的标记来定位）
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+ int startRow = FindDataStartRow(worksheet);
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+
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+ // 填充数据
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+ FillWorksheetWithData(worksheet, data, startRow);
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+
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+ using var outputStream = new MemoryStream();
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+ workbook.Save(outputStream, Aspose.Cells.SaveFormat.Xlsx);
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+ var excelBytes = outputStream.ToArray();
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+
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+ var filePath = await SaveFileAsync(excelBytes, fileName, "excel/templates");
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+ var downloadUrl = $"wwwroot/exports/exports/{filePath}";
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+
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+ return new ExportResult
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+ {
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+ Success = true,
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+ FilePath = filePath,
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+ DownloadUrl = downloadUrl,
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+ FileName = Path.GetFileName(filePath),
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+ FileSize = excelBytes.Length,
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+ MimeType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
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+ };
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+ }
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+ catch (Exception ex)
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+ {
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+ return new ExportResult
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+ {
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+ Success = false,
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+ ErrorMessage = ex.Message
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+ };
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+ }
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+ }
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+
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+ public static async Task<ExportResult> ExportMultipleSheets<T>(Dictionary<string, IEnumerable<T>> sheetsData, string fileName)
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+ {
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+ try
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+ {
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+ using var workbook = new Workbook();
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+ workbook.Worksheets.Clear(); // 清除默认工作表
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+
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+ foreach (var sheet in sheetsData)
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+ {
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+ var worksheet = workbook.Worksheets.Add(sheet.Key);
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+ var data = sheet.Value;
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+
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+ if (data != null && data.Any())
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+ {
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+ FillWorksheetWithData(worksheet, data, 0);
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+ worksheet.AutoFitColumns();
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+ }
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+ }
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+
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+ using var stream = new MemoryStream();
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+ workbook.Save(stream, Aspose.Cells.SaveFormat.Xlsx);
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+ var excelBytes = stream.ToArray();
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+
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+ var filePath = await SaveFileAsync(excelBytes, fileName, "excel/multi-sheets");
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+ var downloadUrl = $"wwwroot/exports/exports/{filePath}";
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+
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+ return new ExportResult
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+ {
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+ Success = true,
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+ FilePath = filePath,
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+ DownloadUrl = downloadUrl,
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+ FileName = Path.GetFileName(filePath),
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+ FileSize = excelBytes.Length,
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+ MimeType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
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+ };
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+ }
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+ catch (Exception ex)
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+ {
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+ return new ExportResult
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+ {
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+ Success = false,
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+ ErrorMessage = ex.Message
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+ };
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+ }
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+ }
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+
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+ public static async Task<ExportResult> ExportWithCustomHeaders<T>(IEnumerable<T> data, Dictionary<string, string> headers, string fileName, string sheetName = "Sheet1")
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+ {
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+ try
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+ {
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+ using var workbook = new Workbook();
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+ var worksheet = workbook.Worksheets[0];
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+ worksheet.Name = sheetName;
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+
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+ // 设置自定义表头
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+ int colIndex = 0;
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+ foreach (var header in headers)
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+ {
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+ worksheet.Cells[0, colIndex].PutValue(header.Value);
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+ colIndex++;
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+ }
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+
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+ // 填充数据
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+ if (data != null && data.Any())
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+ {
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+ int rowIndex = 1;
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+ var properties = typeof(T).GetProperties();
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+
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+ foreach (var item in data)
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+ {
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+ colIndex = 0;
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+ foreach (var header in headers)
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+ {
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+ var property = properties.FirstOrDefault(p => p.Name == header.Key);
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+ if (property != null)
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+ {
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+ var value = property.GetValue(item);
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+ worksheet.Cells[rowIndex, colIndex].PutValue(value);
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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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+ }
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+
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+ worksheet.AutoFitColumns();
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+
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+ using var stream = new MemoryStream();
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+ workbook.Save(stream, Aspose.Cells.SaveFormat.Xlsx);
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+ var excelBytes = stream.ToArray();
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+
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+ var filePath = await SaveFileAsync(excelBytes, fileName, "excel/custom-headers");
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+ var downloadUrl = $"filePath";
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+
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+ return new ExportResult
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+ {
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+ Success = true,
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+ FilePath = filePath,
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+ DownloadUrl = downloadUrl,
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+ FileName = Path.GetFileName(filePath),
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+ FileSize = excelBytes.Length,
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+ MimeType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
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+ };
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+ }
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+ catch (Exception ex)
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+ {
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+ return new ExportResult
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+ {
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+ Success = false,
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+ ErrorMessage = ex.Message
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+ };
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+ }
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+ }
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+
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+ private static byte[] GenerateDefaultExcel<T>(IEnumerable<T> data, string sheetName)
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+ {
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+ using var workbook = new Workbook();
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+ var worksheet = workbook.Worksheets[0];
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+ worksheet.Name = sheetName;
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+
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+ if (data != null && data.Any())
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+ {
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+ FillWorksheetWithData(worksheet, data, 0);
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+ worksheet.AutoFitColumns();
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+ }
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+
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+ return SaveWorkbookToBytes(workbook);
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+ }
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+
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+ private static byte[] GenerateStyledExcel<T>(IEnumerable<T> data, string sheetName)
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+ {
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+ using var workbook = new Workbook();
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+ var worksheet = workbook.Worksheets[0];
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+ worksheet.Name = sheetName;
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+
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+ if (data != null && data.Any())
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+ {
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+ FillWorksheetWithData(worksheet, data, 0);
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+
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+ // 设置样式
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+ var headerStyle = workbook.CreateStyle();
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+ headerStyle.Pattern = BackgroundType.Solid;
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+ headerStyle.ForegroundColor = System.Drawing.Color.LightGray;
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+ headerStyle.Font.IsBold = true;
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+ headerStyle.HorizontalAlignment = TextAlignmentType.Center;
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+
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+ var properties = typeof(T).GetProperties();
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+ Aspose.Cells.Range headerRange = worksheet.Cells.CreateRange(0, 0, 1, properties.Length);
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+ headerRange.ApplyStyle(headerStyle, new StyleFlag { All = true });
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+
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+ worksheet.AutoFitColumns();
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+ }
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+
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+ return SaveWorkbookToBytes(workbook);
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+ }
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+
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+ private static byte[] GenerateExcelWithFormulas<T>(IEnumerable<T> data, string sheetName)
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+ {
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+ using var workbook = new Workbook();
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+ var worksheet = workbook.Worksheets[0];
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+ worksheet.Name = sheetName;
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+
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+ if (data != null && data.Any())
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+ {
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+ FillWorksheetWithData(worksheet, data, 0);
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+
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+ // 添加公式（例如：求和公式）
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+ var properties = typeof(T).GetProperties();
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+ int lastRow = data.Count() + 1;
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+
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+ for (int i = 0; i < properties.Length; i++)
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+ {
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+ if (IsNumericType(properties[i].PropertyType))
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+ {
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+ worksheet.Cells[lastRow, i].Formula = $"=SUM({worksheet.Cells[1, i].Name}:{worksheet.Cells[lastRow - 1, i].Name})";
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+ }
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+ }
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+
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+ worksheet.AutoFitColumns();
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+ }
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+
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+ return SaveWorkbookToBytes(workbook);
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+ }
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+
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+ private static void FillWorksheetWithData<T>(Worksheet worksheet, IEnumerable<T> data, int startRow)
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+ {
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+ var properties = typeof(T).GetProperties();
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+
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+ // 设置表头
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+ for (int i = 0; i < properties.Length; i++)
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+ {
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+ worksheet.Cells[startRow, i].PutValue(properties[i].Name);
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+ }
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+
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+ // 填充数据
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+ int rowIndex = startRow + 1;
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+ foreach (var item in data)
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+ {
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+ for (int colIndex = 0; colIndex < properties.Length; colIndex++)
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+ {
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+ var value = properties[colIndex].GetValue(item);
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+ worksheet.Cells[rowIndex, colIndex].PutValue(value);
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+ }
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+ rowIndex++;
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+ }
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+ }
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+
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+ private static int FindDataStartRow(Worksheet worksheet)
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+ {
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+ // 在实际项目中，可以根据模板中的特定标记来定位数据起始行
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+ // 例如查找 "{{DATA_START}}" 这样的标记
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+ for (int row = 0; row < 50; row++)
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+ {
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+ for (int col = 0; col < 10; col++)
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+ {
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+ var value = worksheet.Cells[row, col].StringValue;
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+ if (value == "{{DATA_START}}")
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+ {
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+ worksheet.Cells[row, col].PutValue(""); // 清空标记
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+ return row + 1;
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+ }
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+ }
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+ }
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+ return 1; // 默认从第2行开始
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+ }
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+
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+ private static byte[] SaveWorkbookToBytes(Workbook workbook)
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+ {
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+ using var stream = new MemoryStream();
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+ workbook.Save(stream, Aspose.Cells.SaveFormat.Xlsx);
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+ return stream.ToArray();
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+ }
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+
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+ private static bool IsNumericType(Type type)
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+ {
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+ return Type.GetTypeCode(type) switch
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+ {
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+ TypeCode.Byte or TypeCode.SByte or TypeCode.UInt16 or TypeCode.UInt32 or
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+ TypeCode.UInt64 or TypeCode.Int16 or TypeCode.Int32 or TypeCode.Int64 or
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+ TypeCode.Decimal or TypeCode.Double or TypeCode.Single => true,
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+ _ => false
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+ };
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+ }
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+
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+
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+ public static async Task<string> SaveFileAsync(byte[] fileData, string fileName, string subFolder = "")
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+ {
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+ try
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+ {
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+ var basePath ="wwwroot/exports/exports";
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+ var folderPath = Path.Combine(basePath, subFolder);
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+ Directory.CreateDirectory(folderPath);
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+
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+ var uniqueFileName = $"{Path.GetFileNameWithoutExtension(fileName)}_{Guid.NewGuid():N}{Path.GetExtension(fileName)}.xlsx";
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+ var filePath = Path.Combine(folderPath, uniqueFileName);
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+
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+ await System.IO.File.WriteAllBytesAsync(filePath, fileData);
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+
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+ var relativePath = Path.Combine(basePath, subFolder, uniqueFileName).Replace("\\", "/");
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+
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+ return relativePath;
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+ }
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+ catch (Exception ex)
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+ {
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+ throw;
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+ }
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+ }
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+
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+ #endregion
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+
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}
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}
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yuanrf