将字符串转换成日期
DateTime datetime = DateTime.ParseExact("Thu Mar 1 19:23:56 UTC+0800 201桃轾庾殇4", format, cultureInfo);
C# 把字符串类型日期转换为日期类型有三种方法
1、Convert.ToDateTime(string)
string格式有要求，必须是yyyy-MM-dd hh:mm:ss
2、Convert.ToDateTime(string, IFormatProvider)
DateTime dt;
DateTimeFormatInfo dtFormat = new System.GlobalizationDateTimeFormatInfo();
dtFormat.ShortDatePattern = "yyyy/MM/dd";
dt = Convert.ToDateTime("2011/05/26", dtFormat);
3、DateTime.ParseExact()
string dateString = "20110526";
DateTime dt = DateTime.ParseExact(dateString, "yyyyMMdd",
System.Globalization.CultureInfo.CurrentCulture);
或者
DateTime dt = DateTime.ParseExact(dateString, "yyyyMMdd",
System.Globalization.CultureInfo.InvariantCulture);
扩展资料：
代码实现：
private void Form1_Load(object sender, EventArgs e)
{
this.timer.Start(); //窗体启动时，启动timer。
label_currentTime.Text = DateTime.Now.ToString("当前时间：" +
"yyyy年MM月dd日 dddd tt HH:mm:ss");
}
/*timer中执行的代码*/
private void timer_Tick(object sender, EventArgs e)
{
DateTime time = DateTime.Now;
string t = time.ToString("当前时间：" + "yyyy年MM月dd日 dddd tt HH:mm:ss");
this.label_currentTime.Text = t;
}