代码如下:

	

	 public static string DateDiff(DateTime DateTime1, DateTime DateTime2)

	         {

	             string dateDiff = null;

	             int date = 0;

	             try

	             {

	                 int year = Convert.ToInt32(DateTime2.ToString("yyyy")) - Convert.ToInt32(DateTime1.ToString("yyyy"));

	                 TimeSpan ts = DateTime2 - DateTime1;

	                 string t1 = DateTime1.ToString("yyyy-MM-dd");

	                 string t2 = DateTime2.ToString("yyyy-MM-dd");

	                 DateTime d1 = DateTime.Parse(t1);

	                 DateTime d2 = DateTime.Parse(t2);

	                 TimeSpan ts2 = d2 - d1;

	                 date = ts2.Days;

	                 if (date == 0)

	                 {

	                     if (ts.Hours > 1)

	                     {

	                         dateDiff = ts.Hours.ToString() + "小时前";

	                     }

	                     else

	                     {

	                         if (ts.Minutes > 1)

	                         {

	                             dateDiff = ts.Minutes.ToString() + "分钟前";

	                         }

	                         else

	                         {

	                             dateDiff = ts.Seconds.ToString() + "秒前";

	                         }

	                     }

	                 }

	                 else

	                 {

	                     if (date == 1)

	                     {

	                         dateDiff = "昨天";

	                     }

	                     else

	                     {

	                         if (date == 2)

	                         {

	                             dateDiff = "前天";

	                         }

	                         else

	                         {

	                             if (year == 0)

	                             {

	                                 dateDiff = DateTime1.Month.ToString() + "月" + DateTime1.Day.ToString() + "日";

	                             }

	                             else

	                             {

	                                 dateDiff = DateTime1.Year.ToString() + "年" + DateTime1.Month.ToString() + "月" + DateTime1.Day.ToString() + "日";

	                             }

	                         }

	                     }

	                 }

	             }

	             catch

	             { }

	             return dateDiff;

	         }