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  • .net core用NPOI导入Excel

    dotnet core 版本:3.1.416

    1、新建项目

      dotnet new console

    2、添加包

      dotnet add package NPOI --version 2.5.5

    3、添加代码

    using System.Reflection.Metadata;
    using System.Reflection.Emit;
    using System.Reflection;
    using System.ComponentModel;
    using System.ComponentModel.DataAnnotations.Schema;
    using System;
    using NPOI.SS.UserModel;
    using NPOI.XSSF.UserModel;
    using NPOI.HSSF.UserModel;
    using System.IO;
    using System.Collections;
    using System.Collections.Generic;
    
    
    namespace console
    {
        class Program
        {
            static void Main(string[] args)
            {
                
                // 导入总表
                IWorkbook wk = null;
                string filePath = @"E:\test.xls";
                string extension = System.IO.Path.GetExtension(filePath);
                try
                {
                    // 总数据
                    List<AllData> list = new List<AllData>();
    
                    FileStream fs = File.OpenRead(filePath);
                    if (extension.Equals(".xls"))
                    {
                        //把xls文件中的数据写入wk中
                        wk = new HSSFWorkbook(fs);
                    }
                    else
                    {
                        //把xlsx文件中的数据写入wk中
                        wk = new XSSFWorkbook(fs);
                    }
    
                    fs.Close();
                    //读取当前表数据
                    ISheet sheet = wk.GetSheetAt(0);
                    IRow row = sheet.GetRow(0);  //读取当前行数据
             
                    //LastRowNum 是当前表的总行数-1(注意)
                    int offset = 0;
                    for (int i = 0; i <= sheet.LastRowNum; i++)
                    {
                        // Console.Write("序号:"+i);
                        row = sheet.GetRow(i);  //读取当前行数据
                        if (row != null)
                        {
                            //LastCellNum 是当前行的总列数
                            for (int j = 0; j < row.LastCellNum; j++)
                            {
                                //读取该行的第j列数据
                                string value = row.GetCell(j).ToString();
                                Console.Write(value.ToString() + " ");
                            }
                            Console.WriteLine("\n");
    
                        }
                    }
                }
                
                catch (Exception e)
                {
                    //只在Debug模式下才输出
                    Console.WriteLine(e.Message);
                }
    
                Console.WriteLine("Hello World!");
            }
    
        }
    }
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  • 原文地址:https://www.cnblogs.com/kwoon/p/15727362.html
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