This article mainly introduces the two methods of importing and exporting Excel data in detail. It has certain reference value. Interested friends can refer to this article. I have shared with you the specific code for C# to import and export Excel data for your reference. The specific content is as follows
Note: It is best to create a new entity class object and inherit the original entity class, so that the type can be modified;
This method is to use the FileInfo stream in EPPLUS to read (I really don’t know if it is a stream, if you know, please leave a message, very Thanks) 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;
}
}
}
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(); } }
Method implementation:
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(); } } }
Method call implementation function:
//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; }
Convert the Excel table into a DataTable table, and then perform business operations on the DataTableusing 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;
}
}
}
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