c# - C# 中的日期计算

Question

我有一个日期作为字符串，格式如下:

yyyy-mm-dd

例如

2011-08-29

我想检查两个日期，看看 date1 是否小于 date2。

伪代码:

string date1 = "2011-08-29";
string date2 = "2011-09-29";

if (date1 < date2) {
    MessageBox.Show("First date is smaller!");
}

Answer 1

DateTime date1 = new DateTime(2009, 8, 1, 0, 0, 0);
DateTime date2 = new DateTime(2009, 8, 1, 12, 0, 0);
int result = DateTime.Compare(date1, date2);
string relationship;

if (result < 0)
   relationship = "is earlier than";
else if (result == 0)
   relationship = "is the same time as";         
else
   relationship = "is later than";