我有一个以下格式的字符串,yyyyMMdd
我试图让它看起来像这样:
yyyy-MM-dd
当我尝试:
string date = "20121004";
Convert.ToDateTime(date).ToString("yyyy-MM-dd");
我得到错误:
FormatException: String was not recognized as a valid DateTime.
以下工作是否可行,或者我会遇到问题:
private string GetValidDate(string date,string format)
{
DateTime result;
if(DateTime.TryParseExact(date, "yyyy-MM-dd", CultureInfo.InvariantCulture, DateTimeStyles.None, out result))
{
return date;
}
else if(DateTime.TryParseExact(date, "yyyyMMdd", CultureInfo.InvariantCulture, DateTimeStyles.None, out result))
{
return DateTime.ParseExact(date, "yyyyMMdd",
CultureInfo.InvariantCulture).ToString("yyyy-MM-dd");
}
else
{
return "Invalid Date Format";
}
}