注：对于实体类对象最好新建一个并且继承原有实体类，这样可以将类型进行修改；
方法一：此种方法是用EPPLUS中的FileInfo流进行读取的（是不是流我还真不太了解，若有懂得请留言，非常感谢了）
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Threading.Tasks;
6 using Abp.Extensions;
7
8 namespace HYZT.Ltxy.International.Ctrip.Exporting
9 {
10 public class ExcelLib
11 {
12 public ICtripPolicyExcelImport GetExcel(string filePath)
13 {
14 if (filePath.Trim() .IsNullOrEmpty())
15 throw new Exception("文件名不能为空");
16 //因为这儿用得是EPPLUS对Excel进行的操作，所以只能操作
17 //2007以后的版本以后的（即扩展名为.xlsx）
18 if (!filePath.Trim().EndsWith("xlsx"))
19 throw new Exception("请使用office Excel 2007版本或2010版本");
20
21 else if (filePath.Trim().EndsWith("xlsx"))
22 {
23 ICtripPolicyExcelImport res = new CtripPolicyExcelImport(filePath.Trim());
24 return res;
25 }
26 else return null;
27 }
28 }
29 }
方法接口：
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Threading.Tasks;
6
7 namespace HYZT.Ltxy.International.Ctrip.Exporting
8 {
9 public interface ICtripPolicyExcelImport
10 {
11 /// <summary> 打开文件 </summary>
12 bool Open();
13 //ExcelVersion Version { get; }
14 /// <summary> 文件路径 </summary>
15 string FilePath { get; set; }
16 /// <summary> 文件是否已经打开 </summary>
17 bool IfOpen { get; }
18 /// <summary> 文件包含工作表的数量 </summary>
19 int SheetCount { get; }
20 /// <summary> 当前工作表序号 </summary>
21 int CurrentSheetIndex { get; set; }
22 /// <summary> 获取当前工作表中行数 </summary>
23 int GetRowCount();
24 /// <summary> 获取当前工作表中列数 </summary>
25 int GetColumnCount();
26 /// <summary> 获取当前工作表中某一行中单元格的数量 </summary>
27 /// <param name="Row">行序号</param>
28 int GetCellCountInRow(int Row);
29 /// <summary> 获取当前工作表中某一单元格的值（按字符串返回） </summary>
30 /// <param name="Row">行序号</param>
31 /// <param name="Col">列序号</param>
32 string GetCellValue(int Row, int Col);
33 /// <summary> 关闭文件 </summary>
34 void Close();
35 }
36 }
方法实现：
1 using OfficeOpenXml;
2 using System;
3 using System.Collections.Generic;
4 using System.IO;
5 using System.Linq;
6 using System.Text;
7 using System.Threading.Tasks;
8
9 namespace HYZT.Ltxy.International.Ctrip.Exporting
10 {
11 public class CtripPolicyExcelImport:ICtripPolicyExcelImport
12 {
13
14 public CtripPolicyExcelImport()
15 { }
16
17 public CtripPolicyExcelImport(string path)
18 { filePath = path; }
19
20
21 private string filePath = "";
22 private ExcelWorkbook book = null;
23 private int sheetCount = 0;
24 private bool ifOpen = false;
25 private int currentSheetIndex = 0;
26 private ExcelWorksheet currentSheet = null;
27 private ExcelPackage ep = null;
28
29 public bool Open()
30 {
31 try
32 {
33 ep = new ExcelPackage(new FileInfo(filePath));
34
35 if (ep == null) return false;
36 book =ep.Workbook;
37 sheetCount = book.Worksheets.Count;
38 currentSheetIndex = 0;
39 currentSheet = book.Worksheets[1];
40 ifOpen = true;
41 }
42 catch (Exception ex)
43 {
44 throw new Exception(ex.Message);
45 }
46 return true;
47 }
48
49 public void Close()
50 {
51 if (!ifOpen || ep == null) return;
52 ep.Dispose();
53 }
54
55 //public ExcelVersion Version
56 //{ get { return ExcelVersion.Excel07; } }
57
58 public string FilePath
59 {
60 get { return filePath; }
61 set { filePath = value; }
62 }
63
64 public bool IfOpen
65 { get { return ifOpen; } }
66
67 public int SheetCount
68 { get { return sheetCount; } }
69
70 public int CurrentSheetIndex
71 {
72 get { return currentSheetIndex; }
73 set
74 {
75 if (value != currentSheetIndex)
76 {
77 if (value >= sheetCount)
78 throw new Exception("工作表序号超出范围");
79 currentSheetIndex = value;
80 currentSheet =book.Worksheets[currentSheetIndex+1];
81 }
82 }
83 }
84
85 public int GetRowCount()
86 {
87 if (currentSheet == null) return 0;
88 return currentSheet.Dimension.End.Row;
89 }
90
91 public int GetColumnCount()
92 {
93 if (currentSheet == null) return 0;
94 return currentSheet.Dimension.End.Column;
95 }
96
97 public int GetCellCountInRow(int Row)
98 {
99 if (currentSheet == null) return 0;
100 if (Row >= currentSheet.Dimension.End.Row) return 0;
101 return currentSheet.Dimension.End.Column;
102 }
103 //根据行号和列号获取指定单元格的数据
104 public string GetCellValue(int Row, int Col)
105 {
106 if (currentSheet == null) return "";
107 if (Row >= currentSheet.Dimension.End.Row || Col >= currentSheet.Dimension.End.Column) return "";
108 object tmpO =currentSheet.GetValue(Row+1, Col+1);
109 if (tmpO == null) return "";
110 return tmpO.ToString();
111 }
112 }
113 }
方法调用实现功能：
1 //用于程序是在本地，所以此时的路径是本地电脑的绝对路劲；
2 //当程序发布后此路径应该是服务器上的绝对路径，所以在此之前还要有
3 //一项功能是将本地文件上传到服务器上的指定位置，此时在获取路径即可
4 public string GetExcelToCtripPolicy(string filePath)
5 {
6 ExcelLib lib = new ExcelLib();
7 if (filePath == null)
8 return new ReturnResult<bool>(false, "未找到相应文件");
9 string str= tmp.GetCellValue(i, j);
10 return str;
11 }
方法二：将Excel表格转化成DataTable表，然后在对DataTable进行业务操作
1 using Abp.Application.Services;
2 using OfficeOpenXml;
3 using System;
4 using System.Collections.Generic;
5 using System.Data;
6 using System.IO;
7 using System.Linq;
8 using System.Text;
9 using System.Threading.Tasks;
10
11 namespace HYZT.Ltxy.International.Ctrip.GetExcelToDataTable
12 {
13 public class EPPlusHelperAppService:ApplicationService,IEPPlusHelperAppService
14 {
15 private static string GetString(object obj)
16 {
17 try
18 {
19 return obj.ToString();
20 }
21 catch (Exception ex)
22 {
23 return "";
24 }
25 }
26
27 /// <summary>
28 ///将指定的Excel的文件转换成DataTable （Excel的第一个sheet）
29 /// </summary>
30 /// <param name="fullFielPath">文件的绝对路径</param>
31 /// <returns></returns>
32 public DataTable WorksheetToTable(string filePath)
33 {
34 try
35 {
36 FileInfo existingFile = new FileInfo(filePath);
37
38 ExcelPackage package = new ExcelPackage(existingFile);
39 ExcelWorksheet worksheet = package.Workbook.Worksheets[1];//选定 指定页
40
41 return WorksheetToTable(worksheet);
42 }
43 catch (Exception)
44 {
45 throw;
46 }
47 }
48
49 /// <summary>
50 /// 将worksheet转成datatable
51 /// </summary>
52 /// <param name="worksheet">待处理的worksheet</param>
53 /// <returns>返回处理后的datatable</returns>
54 public static DataTable WorksheetToTable(ExcelWorksheet worksheet)
55 {
56 //获取worksheet的行数
57 int rows = worksheet.Dimension.End.Row;
58 //获取worksheet的列数
59 int cols = worksheet.Dimension.End.Column;
60
61 DataTable dt = new DataTable(worksheet.Name);
62 DataRow dr = null;
63 for (int i = 1; i <= rows; i++)
64 {
65 if (i > 1)
66 dr = dt.Rows.Add();
67
68 for (int j = 1; j <= cols; j++)
69 {
70 //默认将第一行设置为datatable的标题
71 if (i == 1)
72 dt.Columns.Add(GetString(worksheet.Cells[i, j].Value));
73 //剩下的写入datatable
74 else
75 dr[j - 1] = GetString(worksheet.Cells[i, j].Value);
76 }
77 }
78 return dt;
79 }
80 }
81 }
之前我有一个程序用的是方法一进行Excel导入的，速度不是很快，后来我又用了第二种方法但是速度更慢了，到底这两种方法哪种快，请大虾指导，还是我用第二种方法的时候业务判断有问题，不得而知，
就请明白人知道我到底这两种方法哪种比较好些；
时间： 2024-07-30 13:46:15