从 datTimePicker 中选择日期

发布于 2024-11-26 17:41:44 字数 419 浏览 2 评论 0原文

这是一个代码片段，其中我必须选择正确的日期来预订约会，它应该进行简单的验证，以确保为约会选择的日期是当前日期或晚于该日期的日期。

if (dateTimePicker1.Value < DateTime.Now)
            toolStripStatusLabel1.Text = "Date Selected is not Proper";
else (dateTimePicker1.Value >= DateTime.Now)
            toolStripStatusLabel1.Text = "Date Selected is " + dateTimePicker.Value;

但是，在这里，当我选择当前日期时，它总是进入 if 块。每当我选择晚于当前日期的日期时，它都会正常工作。

谢谢

原文

Here is a code snippet where in I have to select a proper date to book an appointment, it should do a simple validation that the date selected for the appointment is a date which is either the current date or later than that.

if (dateTimePicker1.Value < DateTime.Now)
            toolStripStatusLabel1.Text = "Date Selected is not Proper";
else (dateTimePicker1.Value >= DateTime.Now)
            toolStripStatusLabel1.Text = "Date Selected is " + dateTimePicker.Value;

However, here when I select the Current date it always goes in the if block.When ever I select a date later than the current date it works fine.

Thank you

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杀お生予夺 2024-12-03 17:41:44

您忘记了日期时间的时间部分。你应该使用这个：

if (dateTimePicker1.Value < DateTime.Today)
        toolStripStatusLabel1.Text = "Date Selected is not Proper";
else (dateTimePicker1.Value >= DateTime.Today)
        toolStripStatusLabel1.Text = "Date Selected is " + dateTimePicker.Value;

You are forgetting about the time portion of the DateTime. You should use this instead:

if (dateTimePicker1.Value < DateTime.Today)
        toolStripStatusLabel1.Text = "Date Selected is not Proper";
else (dateTimePicker1.Value >= DateTime.Today)
        toolStripStatusLabel1.Text = "Date Selected is " + dateTimePicker.Value;

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羁拥 2024-12-03 17:41:44

由于 DateTime.Now 包含一天中的时间，因此请尝试 DateTime.Today 这仅获取日期。

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じ违心 2024-12-03 17:41:44

因为 DateTime.Now 不仅返回数据，还返回时间。所以要解决这个问题：

使用 DateTime.Now.Date 而不是 DateTime.Now

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温柔少女心 2024-12-03 17:41:44

DateTime.Now 包括两者日期和时间，以及
'2011-07-29' 始终小于 '2011-07-29 13:50:00'

为此使用 DateTime.Now.Date 或 DateTime.Today种比较。

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深居我梦 2024-12-03 17:41:44

DateTimePicker 有一个 MaximumDate 属性，可以为您执行此检查 - 您尝试过吗？这是文档：

http://msdn.microsoft.com/en-us/library/system.windows.forms.datetimepicker.mindate(v=vs.80).aspx

另外，请记住 DateTime.Now 有小时/分钟/秒 - 从您的示例中不清楚您是否只想比较 DateTime 的日期部分...？

希望这有帮助，

约翰

The DateTimePicker has a MinimumDate property that will do this checking for you -- have you tried that? Here is the documentation:

http://msdn.microsoft.com/en-us/library/system.windows.forms.datetimepicker.mindate(v=vs.80).aspx

Also, keep in mind that DateTime.Now has hours/minutes/seconds - it's not clear from your example if you want to compare just the date portion of the DateTime...?

Hope this helps,

John

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