C#读写Excel的流程步骤

using Excel = Microsoft.Office.Interop.Excel;
using System.Reflection;
using System.Runtime.InteropServices;//导入dll

void dataToExcel(double[,] data, string outName)
{
    Excel.Application app = new Excel.Application();
    Excel._Workbook wbk = app.Workbooks.Add(true);
    Excel._Worksheet whs = wbk.Sheets[1];
    //激活whs
    whs.Activate();

    //将二维数组中的数据写入whs这个sheet
    for (int i = 0; i < data.GetLength(0); i++)
        for (int j = 0; j < data.GetLength(1); j++)
            whs.Cells[i + 1, j + 1] = data[i, j].ToString();

    //将wbk另存为outName
    wbk.SaveAs(outName);
    //关闭wbk
    wbk.Close();
    //退出Excel程序
    app.Quit();
}

double[,] data = new double[5, 5];
// 获取当前工作路径
string path = System.Environment.CurrentDirectory;
// 输出文件的路径
path = Path.Combine(path, "test.xlsx");
dataToExcel(data, path);
Console.WriteLine($"输出到{path}");

void readExcel(string inName)
{
    var app = new Excel.Application();
    var wbk = app.Workbooks.Add(inName);
    //app.Visible = true;
    
    var sh = wbk.Sheets[1];
    sh.Activate();
    Console.WriteLine("您打开了" + sh.Name);
    Console.WriteLine($"本sheet共有{sh.Rows.Count}行，{sh.Columns.Count}列");

    var usedRange = sh.UsedRange.CurrentRegion;
    for (int i = 0; i < usedRange.Rows.Count; i++)
    {
        for (int j = 0; j < usedRange.Columns.Count; j++)
            Console.Write($"{sh.Cells[i + 1, j + 1].Text} ");
        Console.Write("\n");
    }
    wbk.Close();
    app.Quit();
}

string path = System.Environment.CurrentDirectory;
path = Path.Combine(path, "test.xlsx");
readExcel(path);