C# 读取 Excel xlsx 文件

编写 read_excel.cs 如下

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Data;
using System.Linq;
using System.Text;
using System.Data.OleDb;

namespace ReadExcel
{
  public partial class Program
  {
    
    static void Main(string[] args)
    {
        if (args.Length <1){
            Console.WriteLine(" usage: read_excel your_file.xlsx ");
            return ;
        }
        if (! File.Exists(args[0])){
            Console.WriteLine("Error: {0} not exists.", args[0]);
            return ;
        }
        if (Path.GetExtension(args[0]) != ".xlsx"){
            Console.WriteLine("Tip: can only read file.xlsx");
        }
        string filePath = args[0]; // your_excel_file_path
 
        string connStr = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0 Xml;HDR=YES;IMEX=1\"", filePath);
 
        using (OleDbConnection conn = new OleDbConnection(connStr))
        {
            conn.Open();
 
            string sheet1 = "Sheet1";
 
            string query = string.Format("SELECT * FROM [{0}$]", sheet1);
 
            using (OleDbDataAdapter adapter = new OleDbDataAdapter(query, conn))
            {
                DataTable dataTable = new DataTable();
                adapter.Fill(dataTable);
                int rows, cols;
                // 处理获取到的数据
                foreach (DataRow row in dataTable.Rows)
                {
                    rows = row.Table.Rows.IndexOf(row) +1;
                    foreach (DataColumn column in dataTable.Columns)
                    {
                        string value = row[column].ToString() ?? string.Empty;                       
                        cols = column.Ordinal +1;
                        Console.WriteLine("Cell({0:d},{1:d}): {2}", rows,cols,value);
                    }
                }
            }
        } 
        Console.ReadKey();
    }
  }
}

SET PATH=C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319;%PATH%

编译：csc.exe  /t:exe read_excel.cs  

环境：win10 64位系统 运行 \your\path\read_excel  test1.xlsx

错误信息：未在本地计算机上注册“microsoft.ACE.oledb.12.0”提供程序。

搜索 Microsoft Access Database Engine 2016 

我先下载了  accessdatabaseengine.exe 安装好后，还是运行出错。

卸载了32位版本，又下载了 AccessDatabaseEngine_X64.exe 安装好后，能运行了。