在asp.net c中從excel轉換為datatable時更改日期格式＃

Question

我試圖導入excel，excel中的日期列正在更改為數字格式。 例如，我在excel Name，age和Dob中有3列

當我嘗試將此excel轉換為數據表時，Dob列中的日期將更改為數字。

using (ExcelPackage excelPackage = new ExcelPackage(fi))      
{
    ExcelWorksheet worksheet = excelPackage.Workbook.Worksheets[sheetName];
    ExcelCellAddress startCell = worksheet.Dimension.Start;
    ExcelCellAddress endCell = worksheet.Dimension.End;
    if (endCell.Row > 0)
    {
        for (int col = startCell.Column; col <= endCell.Column; col++)
        {
            dt.Columns.Add(Convert.ToString(worksheet.Cells[startCell.Row, col].Value));
        }

        for (int row = startCell.Row + 1; row <= endCell.Row; row++)
        {
            DataRow dr = dt.NewRow();
            int x = 0;
            for (int col = startCell.Column; col <= endCell.Column; col++)enter code here
            {
                dr[x++] = worksheet.Cells[row, col].Value;
            }

            dt.Rows.Add(dr);
        }
    }
}

Answer 1

嘗試這個，

double val= double.Parse("42552");
DateTime requiredDate= DateTime.FromOADate(val);

Answer 2

請通過更改單元格的格式來嘗試這一點。

Range r = (Excel.Range)worksheetobject.Cells[row,column];
r.EntireColumn.NumberFormat = "MM/DD/YYYY";

並能做到這一點還，

double value = double.Parse(convertedNumber);
DateTime yourData = DateTime.FromOADate(value);

Answer 3

將列類型設置為“Text”並設置格式：

worksheet.Cells[row, col].NumberFormat = "@";