本文为大家分享了C#导入导出Excel数据的具体代码，供大家参考，具体内容如下
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
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using Abp.Extensions;namespace HYZT.Ltxy.International.Ctrip.Exporting{ public class ExcelLib { public ICtripPolicyExcelImport GetExcel(string filePath) { if (filePath.Trim() .IsNullOrEmpty()) throw new Exception("文件名不能为空"); //因为这儿用得是EPPLUS对Excel进行的操作，所以只能操作 //2007以后的版本以后的（即扩展名为.xlsx） if (!filePath.Trim().EndsWith("xlsx")) throw new Exception("请使用office Excel 2007版本或2010版本"); else if (filePath.Trim().EndsWith("xlsx")) { ICtripPolicyExcelImport res = new CtripPolicyExcelImport(filePath.Trim()); return res; } else return null; } }} |
方法接口：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace HYZT.Ltxy.International.Ctrip.Exporting{ public interface ICtripPolicyExcelImport { /// <summary> 打开文件 </summary> bool Open(); //ExcelVersion Version { get; } /// <summary> 文件路径 </summary> string FilePath { get; set; } /// <summary> 文件是否已经打开 </summary> bool IfOpen { get; } /// <summary> 文件包含工作表的数量 </summary> int SheetCount { get; } /// <summary> 当前工作表序号 </summary> int CurrentSheetIndex { get; set; } /// <summary> 获取当前工作表中行数 </summary> int GetRowCount(); /// <summary> 获取当前工作表中列数 </summary> int GetColumnCount(); /// <summary> 获取当前工作表中某一行中单元格的数量 </summary> /// <param name="Row">行序号</param> int GetCellCountInRow(int Row); /// <summary> 获取当前工作表中某一单元格的值（按字符串返回） </summary> /// <param name="Row">行序号</param> /// <param name="Col">列序号</param> string GetCellValue(int Row, int Col); /// <summary> 关闭文件 </summary> void Close(); }} |
方法实现：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
using OfficeOpenXml;using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;namespace HYZT.Ltxy.International.Ctrip.Exporting{ public class CtripPolicyExcelImport:ICtripPolicyExcelImport { public CtripPolicyExcelImport() { } public CtripPolicyExcelImport(string path) { filePath = path; } private string filePath = ""; private ExcelWorkbook book = null; private int sheetCount = 0; private bool ifOpen = false; private int currentSheetIndex = 0; private ExcelWorksheet currentSheet = null; private ExcelPackage ep = null; public bool Open() { try { ep = new ExcelPackage(new FileInfo(filePath)); if (ep == null) return false; book =ep.Workbook; sheetCount = book.Worksheets.Count; currentSheetIndex = 0; currentSheet = book.Worksheets[1]; ifOpen = true; } catch (Exception ex) { throw new Exception(ex.Message); } return true; } public void Close() { if (!ifOpen || ep == null) return; ep.Dispose(); } //public ExcelVersion Version //{ get { return ExcelVersion.Excel07; } } public string FilePath { get { return filePath; } set { filePath = value; } } public bool IfOpen { get { return ifOpen; } } public int SheetCount { get { return sheetCount; } } public int CurrentSheetIndex { get { return currentSheetIndex; } set { if (value != currentSheetIndex) { if (value >= sheetCount) throw new Exception("工作表序号超出范围"); currentSheetIndex = value; currentSheet =book.Worksheets[currentSheetIndex+1]; } } } public int GetRowCount() { if (currentSheet == null) return 0; return currentSheet.Dimension.End.Row; } public int GetColumnCount() { if (currentSheet == null) return 0; return currentSheet.Dimension.End.Column; } public int GetCellCountInRow(int Row) { if (currentSheet == null) return 0; if (Row >= currentSheet.Dimension.End.Row) return 0; return currentSheet.Dimension.End.Column; } //根据行号和列号获取指定单元格的数据 public string GetCellValue(int Row, int Col) { if (currentSheet == null) return ""; if (Row >= currentSheet.Dimension.End.Row || Col >= currentSheet.Dimension.End.Column) return ""; object tmpO =currentSheet.GetValue(Row+1, Col+1); if (tmpO == null) return ""; return tmpO.ToString(); } } } |
方法调用实现功能：
|
1
2
3
4
5
6
7
8
9
10
11
|
//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；//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//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 public string GetExcelToCtripPolicy(string filePath) { ExcelLib lib = new ExcelLib(); if (filePath == null) return new ReturnResult<bool>(false, "未找到相应文件"); string str= tmp.GetCellValue(i, j); return str; } |
方法二：将Excel表格转化成DataTable表，然后在对DataTable进行业务操作
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
using Abp.Application.Services;using OfficeOpenXml;using System;using System.Collections.Generic;using System.Data;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;namespace HYZT.Ltxy.International.Ctrip.GetExcelToDataTable{ public class EPPlusHelperAppService:ApplicationService,IEPPlusHelperAppService { private static string GetString(object obj) { try { return obj.ToString(); } catch (Exception ex) { return ""; } } /// <summary> ///将指定的Excel的文件转换成DataTable （Excel的第一个sheet） /// </summary> /// <param name="fullFielPath">文件的绝对路径</param> /// <returns></returns> public DataTable WorksheetToTable(string filePath) { try { FileInfo existingFile = new FileInfo(filePath); ExcelPackage package = new ExcelPackage(existingFile); ExcelWorksheet worksheet = package.Workbook.Worksheets[1];//选定 指定页 return WorksheetToTable(worksheet); } catch (Exception) { throw; } } /// <summary> /// 将worksheet转成datatable /// </summary> /// <param name="worksheet">待处理的worksheet</param> /// <returns>返回处理后的datatable</returns> public static DataTable WorksheetToTable(ExcelWorksheet worksheet) { //获取worksheet的行数 int rows = worksheet.Dimension.End.Row; //获取worksheet的列数 int cols = worksheet.Dimension.End.Column; DataTable dt = new DataTable(worksheet.Name); DataRow dr = null; for (int i = 1; i <= rows; i++) { if (i > 1) dr = dt.Rows.Add(); for (int j = 1; j <= cols; j++) { //默认将第一行设置为datatable的标题 if (i == 1) dt.Columns.Add(GetString(worksheet.Cells[i, j].Value)); //剩下的写入datatable else dr[j - 1] = GetString(worksheet.Cells[i, j].Value); } } return dt; } }} |
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，就请明白人指导我到底这两种方法哪种比较好些。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
