当字符串具有不同的格式[重复]时,有没有方法将字符串解析为DateTime

您可以使用支持多种格式的重载:

string[] formats = {"MM/dd/yyyy HH:mm:ss", "MM/dd/yyyy HH:mm" };
DateTime formattedDateCreated = DateTime.ParseExact(fields[DateCreatedIndex], formats, CultureInfo.InvariantCulture, DateTimeStyles.None);

DateTime.ParseExact 也可以采用多种格式:

var formats = new []
{
    "MM/dd/yyyy HH:mm:ss",
    "MM/dd/yyyy HH:mm"
};
var dates = "03/30/2016 10:55:49;04/01/2016 11:02".Split(';')
    .Select(x => DateTime.ParseExact(x, formats, CultureInfo.InvariantCulture, DateTimeStyles.None));