本文介绍C#编程时将String类型字符串转换为DateTime类型的三种方法：

方法1：Convert.ToDateTime(string)

string格式有要求，必须是yyyy-MM-dd hh:mm:ss

方法2：Convert.ToDateTime(string, IFormatProvider)

DateTime dt;
DateTimeFormatInfo dtFormat = new System.GlobalizationDateTimeFormatInfo();
dtFormat.ShortDatePattern = "yyyy/MM/dd";
dt = Convert.ToDateTime("2012/11/26", dtFormat);

方法3：DateTime.ParseExact()

string dateString = "20121126";
DateTime dt = DateTime.ParseExact(dateString, "yyyyMMdd", System.Globalization.CultureInfo.CurrentCulture);
//或者
DateTime dt = DateTime.ParseExact(dateString, "yyyyMMdd", System.Globalization.CultureInfo.InvariantCulture);