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.net development: NPOI files excelsus ad orbem generat

2024-07-12

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Source code available for temptationis

Utere .net toolkit NPOI ad praecellentes limas ad locorum orbis generandum.

In inceptis actualibus, viam ministranti specificare potes et generatas limas repone in certo indicem in calculonis servi.

moderatoris tabulatum

  1. [HttpPost("ExportExcel")]
  2. public void ExportExcel()
  3. {
  4. _TestService.ExportToExcel();
  5. }

ministerium accumsan

  1. public void ExportToExcel() {
  2. String FileName = "D:\learning\yxl\chinese\2024年7月10日星期三.xlsx";
  3. var chineseWordList = this.WrapChineseWord();
  4. ExportExcelToDiskUtils<ChineseWord>.ExportToExcel(chineseWordList, FileName);
  5. }

NPOI instrumentum classis

  1. using Newtonsoft.Json;
  2. using NPOI.HPSF;
  3. using NPOI.SS.Formula.Functions;
  4. using NPOI.SS.UserModel;
  5. using NPOI.XSSF.UserModel;
  6. using System.Reflection;
  7. namespace Learning.Dotnet
  8. {
  9. public class ExportExcelToDiskUtils<T>
  10. {
  11. public static void ExportToExcel(List<T> list, String FileName)
  12. {
  13. var workbook = new XSSFWorkbook();
  14. var sheet = workbook.CreateSheet("Sheet1");
  15. IRow row1 = sheet.CreateRow(0);
  16. Type t = typeof(T);
  17. int cell = 0;
  18. var properties = t.GetProperties().Where(p => p.GetCustomAttribute<JsonPropertyAttribute>() != null).Select(p => p).ToList();
  19. foreach (var pro in properties)
  20. {
  21. row1.CreateCell(cell).SetCellValue(pro.GetCustomAttribute<JsonPropertyAttribute>().PropertyName);
  22. cell++;
  23. }
  24. int row = 1;
  25. foreach (var item in list)
  26. {
  27. cell = 0;
  28. IRow newRow = sheet.CreateRow(row);
  29. foreach (var pro in properties)
  30. {
  31. var value = list[row - 1];
  32. newRow.CreateCell(cell).SetCellValue(Convert.ToString(pro.GetValue(value, null)));
  33. cell++;
  34. }
  35. row++;
  36. }
  37. // 导出到文件
  38. using (FileStream file = new FileStream(FileName, FileMode.Create, FileAccess.Write))
  39. {
  40. workbook.Write(file);
  41. }
  42. // 释放资源
  43. workbook.Close();
  44. }
  45. }
  46. }

Negotium Object Model

  1. using Newtonsoft.Json;
  2. namespace Learning.Models.Chinese
  3. {
  4. public class ChineseWord
  5. {
  6. [JsonProperty(PropertyName = "field1")]
  7. public string field1 { get; set; }
  8. [JsonProperty(PropertyName = "field2")]
  9. public string field2 { get; set; }
  10. [JsonProperty(PropertyName = "field3")]
  11. public string field3 { get; set; }
  12. [JsonProperty(PropertyName = "field4")]
  13. public string field4 { get; set; }
  14. [JsonProperty(PropertyName = "field5")]
  15. public string field5 { get; set; }
  16. [JsonProperty(PropertyName = "field6")]
  17. public string field6 { get; set; }
  18. [JsonProperty(PropertyName = "field7")]
  19. public string field7 { get; set; }
  20. [JsonProperty(PropertyName = "field8")]
  21. public string field8 { get; set; }
  22. [JsonProperty(PropertyName = "field9")]
  23. public string field9 { get; set; }
  24. [JsonProperty(PropertyName = "field10")]
  25. public string field10 { get; set; }
  26. }
  27. }

Data encapsulation

Hic est demonstratio rectae notitiae ludibrium.

  1. private List<ChineseWord> WrapChineseWord()
  2. {
  3. var chineseWord = new ChineseWord();
  4. chineseWord.field1 = "field1";
  5. chineseWord.field2 = "field2";
  6. chineseWord.field3 = "field3";
  7. chineseWord.field4 = "field4";
  8. chineseWord.field5 = "field5";
  9. chineseWord.field6 = "field6";
  10. chineseWord.field7 = "field7";
  11. chineseWord.field8 = "field8";
  12. chineseWord.field9 = "field9";
  13. chineseWord.field10 = "field10";
  14. var chineseWord2 = new ChineseWord();
  15. chineseWord2.field1 = "field1";
  16. chineseWord2.field2 = "field2";
  17. chineseWord2.field3 = "field3";
  18. chineseWord2.field4 = "field4";
  19. chineseWord2.field5 = "field5";
  20. chineseWord2.field6 = "field6";
  21. chineseWord2.field7 = "field7";
  22. chineseWord2.field8 = "field8";
  23. chineseWord2.field9 = "field9";
  24. chineseWord2.field10 = "field10";
  25. var chineseWordList = new List<ChineseWord>();
  26. chineseWordList.Add(chineseWord);
  27. chineseWordList.Add(chineseWord2);
  28. _Logger.LogInformation("chineseWordList:{}", JsonConvert.SerializeObject(chineseWordList));
  29. return chineseWordList;
  30. }