如何从提供搜索条件的列表中选择日期范围

Question

   DateInfo[] dateInfo= GetDateInfo();

   DateInfo[] searchDates  = null;
   DateTime dtfrom = DateTime.Parse(txtFromDate.Text);
   DateTime dtTo = DateTime.Parse(txtToDate.Text);
   searchDates = dateInfo.Where(p => p.AddDate >= dtfrom || p.AddDate < dtTo).ToArray<DateInfo>();

如果列表包含

11/17/13,11/18/13,11/19/13,11/19/13,11/19/13,11/20/13,11/20/13 

我已经进入

11/17/13 to 11/19/13 

它应该返回

11/17/13,11/18/13,11/19/13,11/19/13,11/19/13

Answer 1

替换|| 与&& ：

searchDates = dateInfo.Where(p => p.AddDate >= dtfrom && p.AddDate <= dtTo)
                      .ToArray();

Answer 2

searchDates = dateInfo
   .Where(p => p.AddDate >= dtfrom && p.AddDate <= dtTo)
   .ToArray<DateInfo>();

在这种情况下，AND将强制过滤介于两者之间的日期，而您的条件将涵盖所有内容。

Answer 3

感谢您的回答。我的问题通过编写此查询得以解决

searchDates  = dateInfo.Where(p => (p.AddDate.Date.Year >= dtfrom.Date.Year && p.AddDate.Date.Month >= dtfrom.Date.Month && p.AddDate.Date.Day >= dtfrom.Date.Day) && (p.AddDate.Date.Year <= dtTo.Date.Year && p.AddDate.Date.Month <= dtTo.Date.Month && p.AddDate.Date.Day <= dtTo.Date.Day)).ToArray<DateInfo>();