C# 如何防止excel导入中日期列转换为字符串

我正在使用以下代码导入excel并读取文件

从日期列获取数据时，它会自动转换为字符串。在excel中，此列的格式为日期 所以如果有日期“2019年9月9日”，我会得到43717

以下是我的最低代码：

for (int rowIterator = 2; rowIterator <= noOfRow; rowIterator++)   
{
    var ex = new ExcelData();
    ex.CostCode = workSheet.Cells[rowIterator, 1].Value.ToString();
    ex.EmployeeNumber = workSheet.Cells[rowIterator, 2].Value.ToString();
    ex.Class = workSheet.Cells[rowIterator, 3].Value.ToString();
    ex.Date = workSheet.Cells[rowIterator, 4].Value.ToString();
    ex.Hours = workSheet.Cells[rowIterator, 5].Value.ToString();
    ex.PayType = workSheet.Cells[rowIterator, 6].Value.ToString();
    dataList.Add(ex);  
} 

for (int rowIterator = 2; rowIterator <= noOfRow; rowIterator++)   
{
    var ex = new ExcelData();
    ex.CostCode = workSheet.Cells[rowIterator, 1].Value.ToString();
    ex.EmployeeNumber = workSheet.Cells[rowIterator, 2].Value.ToString();
    ex.Class = workSheet.Cells[rowIterator, 3].Value.ToString();
    ex.Date = workSheet.Cells[rowIterator, 4].Value.ToString();
    ex.Hours = workSheet.Cells[rowIterator, 5].Value.ToString();
    ex.PayType = workSheet.Cells[rowIterator, 6].Value.ToString();
    dataList.Add(ex);  
} 

---

对于（int-rowIterator=2；rowIterator您必须将字符串转换为DateTime

例如，Date=workSheet.Cells[rowIterator，4].Value.ToString（“yyyy-MM-dd-hh:ss”）

for（int-rowditerator=2；rowditerator）