c# - 如何避免 Try and Catch 语句

Question

//Example 2 - Validate Date for the format MM/DD/YYYY 
private bool ValidateDate(string stringDateValue)
{
   try
   {
       CultureInfo CultureInfoDateCulture = new CultureInfo("en-US");
       DateTime d = DateTime.ParseExact(stringDateValue, "MM/dd/yyyy", CultureInfoDateCulture);
       return true;
   }
   catch
   {
       return false;
   }
 }

---

如何在不使用 try 和 catch 的情况下设置此代码工作？

Answer 1

使用DateTime.TryParseExact：

private bool ValidateDate(string stringDateValue)
{
    DateTime dummy;
    CultureInfo CultureInfoDateCulture = new CultureInfo("en-US");
    return DateTime.TryParseExact(stringDateValue, "MM/dd/yyyy",
                                  CultureInfoDateCulture, DateTimeStyles.None,
                                  out dummy);
}

Answer 2

改为使用DateTime.TryParseExact，这将让您使用有条件的if.

Answer 3

我认为最简单的方法是：

    private static bool ValidateDate(string stringDateValue)
    {
        DateTime dummy;
        return DateTime.TryParseExact(stringDateValue, "MM/dd/yyyy", CultureInfo.CreateSpecificCulture("en-US"), DateTimeStyles.None,  out dummy);
    }

Answer 4

你可以试试：

CultureInfo CultureInfoDateCulture = new CultureInfo("en-US");
DateTime date;

bool works = DateTime.TryParseExact(dateString, "MM/dd/yyyy", CultureInfoDateCulture , 
                       DateTimeStyles.None, out date))