这是我的问题:
DateTime previousDate = new DateTime();
DateTime currentDate = new DateTime();
foreach (ApproverVo approver in approvers)
{
if (previousDate != null)
{
currentDate = (DateTime)approver.ApprovalDate;
totalTimeSpan += (currentDate - previousDate).TotalDays;
previousDate = currentDate;
} else
previousDate = (DateTime)approver.ApprovalDate;
}
当在开始时声明前一个日期时,它包含 DateTime() 的默认值。我想要做的是找出是否为 previousDate 分配了正确的日期。
请指教,谢谢
最佳答案
假设您的批准日期没有等于 DateTime.MinValue
的值:
DateTime previousDate = DateTime.MinValue;
DateTime currentDate = new DateTime();
foreach (ApproverVo approver in approvers)
{
if (previousDate != DateTime.MinValue)
{
currentDate = (DateTime)approver.ApprovalDate;
totalTimeSpan += (currentDate - previousDate).TotalDays;
previousDate = currentDate;
} else
previousDate = (DateTime)approver.ApprovalDate;
}
更新
根据@mdmullinax 的回答,上面的代码类似于:
DateTime previousDate = new DateTime();
DateTime currentDate = new DateTime();
foreach (ApproverVo approver in approvers)
{
if (previousDate != new DateTime())
{
currentDate = (DateTime)approver.ApprovalDate;
totalTimeSpan += (currentDate - previousDate).TotalDays;
previousDate = currentDate;
} else
previousDate = (DateTime)approver.ApprovalDate;
}
关于c# - 确定新日期是否是默认的 new DateTime(),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/15060618/