如何解决转换错误 [英] How to resolve conversion error

问题描述

if (Convert.ToDateTime(txtTodate.Text).Date < DateTime.Now.Date && Convert.ToDateTime(txtTodate.Text).Date < Convert.ToDateTime(txtdesigndate.Text).Date)

如何解决转换错误？



我有什么试过：



我正在尝试解决转换错误

How to resolve conversion error?

What I have tried:

I am trying to resolve conversion error

推荐答案

从不使用开始 Convert.ToDateTime 。

相反，请使用DateTime.TryParse：

Start by not using Convert.ToDateTime.
Instead, use DateTime.TryParse:

DateTime toDate;
if (!DateTime.TryParse(txtToDate.Text, out toDate))
   {
   ... Report problem to user so he can  correct it
   return;
   }
toDate = toDate.Date;
DateTime designDate;
if (!DateTime.TryParse(txtdesignDate.Text, out designDate))
   {
   ... Report problem to user so he can  correct it
   return;
   }
designDate = designate.Date;
if (todate < DateTime.Now.Date && todate < designDate)
   {
   ...

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