我如何在 c# 上读取 csv 文件的范围 [关闭]

Question

我正在制作一个应用程序来订购由 logo8 生成的数据。 logo8 生成一个像这样的 csv 文件 logo8 在生成 20000 行数据时创建一个新文件。

所以应用程序必须创建一个Excel 文件，其中所有数据都按日期排序，预期结果必须如下所示

我的代码是这样的：

  private void Button1_Click(object sender, EventArgs e) {

        if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
            ruta = folderBrowserDialog1.SelectedPath;
        arreglado = new Excel("Informe_general", hojas);
        DirectoryInfo dir = new DirectoryInfo(@ruta);
        FileInfo[] f = dir.GetFiles();
        foreach (var item in f)  
            openfile(item.FullName);

        MessageBox.Show("Se termino");
    }
    int ccc=0;
    Excel excel=new Excel();
    public void openfile(string ruta) {
        excel = new Excel(@ruta, 1);
        vitacora("Se abrio " + @ruta + " con exito");
        leerdatos();
    }

    private void Button2_Click(object sender, EventArgs e) {
        leerdatos();
    }
    string[,] todo;

    public bool arreglardatos(string[,] todo) {
        try {
            for (int i = 1; i < 19999; i++) {

                double d = Convert.ToDouble(todo[i, 0]);
                DateTime a = DateTime.FromOADate(d);
                todo[i, 0] = a.ToString();
            }
            DateTime s = Convert.ToDateTime(todo[1, 0]);
            DateTime s2 = Convert.ToDateTime(todo[19998, 0]);

            if (s.ToShortDateString() != s2.ToShortDateString()) {
                return true;
            } else {
                return false;
            }
        } catch {
            return false;
        }
    }
    int cambiodefecha = 0;
    public int busquedabinaria(int f1, int f2) {
        bool seguir = true;
        for (int i = 1; i < 19999 && seguir; i++) {

            DateTime a = Convert.ToDateTime(todo[i, 0]);
            DateTime b = Convert.ToDateTime(todo[i+1, 0]);
            if (a.Day == f1 && b.Day == f2) {
                cambiodefecha = i;
                seguir = false;
            }
        }

        return cambiodefecha+1;
    }
    public void leerdatos() {
        bool valido = true;
        todo= excel.Readrange(1, 1, excel.getRowCount(), excel.getcolumncount());
        foreach (var item in todo) {
            if (item == "error")
                valido = false;
        }
        vitacora("Se leyeron los datos de " + ruta);

        if (valido) {
            if (!arreglardatos(todo)) {
                vitacora("Corrigiendo campos");
                escribirdatos(false);

            } else {
                DateTime a = Convert.ToDateTime(todo[1, 0]);
                DateTime b = Convert.ToDateTime(todo[19998, 0]);

                vitacora("cambiode fecha en " + busquedabinaria(a.Day, b.Day));
                escribirdatos(true);
                cambiodefecha = 0;

            }
            ccc++;
        } else {
            vitacora("El archivo " + ruta + " no es valido");
            ccc++;
        }
    }
    public void vitacora(string d) {
        listBox1.Items.Add(d);
    }


    public void escribirdatos(bool cambiofecha) {
        if (!cambiofecha) {

            arreglado.Writerange(2, 2, 21000,78, todo);
            DateTime a = Convert.ToDateTime(todo[1, 0]);
            arreglado.setname(a.ToShortDateString()+"("+hojas+")");
            vitacora("Se transfirieron los datos a Informe general.xlsx");
        } else {
            arreglado.Writerange(2, 2, cambiodefecha + 1, 78, todo);
            DateTime b = Convert.ToDateTime(todo[1, 0]);
            arreglado.setname(b.ToShortDateString() + " ("+ hojas +")");
            arreglado.createnewsheet();
            arreglado.Writerange(2, 2, 20000-cambiodefecha, 78, todo);
            DateTime a = Convert.ToDateTime(todo[cambiodefecha+9, 0]);
            hojas++;
            arreglado.setname(a.ToShortDateString() + " (" + hojas + ")");
            vitacora("Se transfirieron los datos a Informe general.xlsx");
        }

        arreglado.createnewsheet();
        hojas++;
        arreglado.save();

    }

我的 class excel 是这样的：

public class Excel {
    string path = "";
    _Application excel = new _Excel.Application();


    Workbook wb;
    Worksheet ws;



    public Excel(string path,int sheet) {
        try {

            this.path = path;
            wb = excel.Workbooks.Open(Filename: path);
            ws = (Microsoft.Office.Interop.Excel.Worksheet)wb.Worksheets[sheet];

        } catch {
            wb.Close();
        } 
    }

    public Excel() {}

    public int getsheetscount() {
        return wb.Sheets.Count;
    }
    public string[] getsheetsname() {

        string[] nombres = new string[wb.Sheets.Count];
        for (int i = 1; i < wb.Sheets.Count; i++) {
            nombres[i - 1] = wb.Worksheets[i].Name;
        }
        return nombres;
    }


    public void createnewsheet() {
        Worksheet tempSheet = wb.Worksheets.Add(After: ws);
        ws = tempSheet;
    }


    public async void Writerange(int starti, int starty, int endi, int endy, string[,] datos) { 
        Range range = (Range)ws.Range[ws.Cells[starti, starty], ws.Cells[endi, endy]];
         range.Value2 = datos;            
    }



    public void focussheet(int t) {
       ws= wb.Worksheets[t];
    }
    public void setname(string d) {
        d = d.Replace('/', '-');
        ws.Name = d;
    }
    public string[,] Readrange(int starti,int starty,int endi,int endy) {

            Range range = (Range)ws.Range[ws.Cells[starti, starty], ws.Cells[endi, endy]];
            object[,] holder = range.Value2;

             string[,] returnstring = new string[endi - starti, endy - starty];
             for (int p = 1; p <= endi - starti; p++)  {
                 for (int q = 1; q <= endy - starty; q++) {
                     returnstring[p - 1, q - 1] = holder[p, q].ToString();
                 }

             }
             return returnstring;
     }

    public void createnewfile() {

        this.wb = excel.Workbooks.Add(XlWBATemplate.xlWBATWorksheet);
        this.ws = wb.Worksheets[1];
    }


    public void save() {
        wb.Save();
    }
    public void saveas(string path) {
        object misValue = System.Reflection.Missing.Value; 
        wb.SaveAs(path); 
    }
    public int getcolumncount() {
        return ws.UsedRange.Columns.Count;
    }
    public int getRowCount()  {
        int a=Convert.ToInt32( ws.UsedRange.Rows.Count);
        return a;
    }
    public void close() {
        wb.Close(true); 
    }