我如何可以验证该日期是不是在.NET C#的未来的日期 [英] How can I validate the date is not the future date in .net c#
问题描述
只是游荡,我怎么能确认的日期是不是在.NET C#的未来的日期。
例如:
我已经为必填字段验证应用验证那里。但不知何故,我不知道如何应用的验证检查的开始日期,以确保它不是将来的日期(日期不能大于当前日期)?
< TR>
< TD ALIGN =权利与GT;开始日期:< / TD>
< TD>< ASP:文本框=服务器ID =activeDate大小=8/>(YYYY-MM-DD)
< ASP:使用RequiredFieldValidator ID =reqvactiveDate=服务器
的ControlToValidate =activeDate显示=动态EnableClientScript =真
的ErrorMessage =需要/>
< / TD>
< / TR>
不是我写了下面code至尝试了日期验证。日期验证似乎并没有为我工作:(
< TR>
< TD ALIGN =权利与GT;开始日期:< / TD>
< TD>< ASP:文本框=服务器ID =activeDate大小=8/>(YYYY-MM-DD)
< ASP:使用RequiredFieldValidator ID =reqvactiveDate=服务器
的ControlToValidate =activeDate显示=动态EnableClientScript =真
的ErrorMessage =需要/>
< ASP:的CustomValidator =服务器
ID =valDateRange
的ControlToValidate =activeDate
onservervalidate =valDateRange_ServerValidate
的ErrorMessage =请输入有效日期/>
< / TD>
< / TR>
身后code:
保护无效valDateRange_ServerValidate(对象源,ServerValidateEventArgs参数)
{
日期时间为MinDate = DateTime.Parse(1000年12月28日);
日期时间的maxDate = DateTime.Parse(2011/05/26);
DateTime的DT;
args.IsValid =(DateTime.TryParse(args.Value,出DT)
&功放;&安培; DT< =的maxDate
&功放;&安培; DT> =为MinDate);
}
日期时间实现了IComparer的接口。检查其是否大于DateTime.Now
没有理由去分析它,只是做:
如果(datetime1> DATETIME2)
{
....
}
Just wandering, how can I validate the date is not the future date in .net c#.
Example:
I have applied a validation there for required field validation. But somehow I have no idea how to apply the validation to check the start date to make sure it's not the future date (date not greater then the current date)?
<tr>
<td align="right">Start Date:</td>
<td><asp:TextBox runat="server" ID="activeDate" size="8"/>(YYYY-MM-DD)
<asp:RequiredFieldValidator ID="reqvactiveDate" runat="server"
ControlToValidate="activeDate" Display="Dynamic" EnableClientScript="true"
ErrorMessage="required" />
</td>
</tr>
than I wrote the following code to tried out the date validation. The date validation doesn't seem working for me :(
<tr>
<td align="right">Start Date:</td>
<td><asp:TextBox runat="server" ID="activeDate" size="8"/>(YYYY-MM-DD)
<asp:RequiredFieldValidator ID="reqvactiveDate" runat="server"
ControlToValidate="activeDate" Display="Dynamic" EnableClientScript="true"
ErrorMessage="required" />
<asp:CustomValidator runat="server"
ID="valDateRange"
ControlToValidate="activeDate"
onservervalidate="valDateRange_ServerValidate"
ErrorMessage="enter valid date" />
</td>
</tr>
code behind:
protected void valDateRange_ServerValidate(object source, ServerValidateEventArgs args)
{
DateTime minDate = DateTime.Parse("1000/12/28");
DateTime maxDate = DateTime.Parse("2011/05/26");
DateTime dt;
args.IsValid = (DateTime.TryParse(args.Value, out dt)
&& dt <= maxDate
&& dt >= minDate);
}
DateTime implements an IComparer interface. Check if its greater than DateTime.Now
There is no reason to parse it, just do:
if(datetime1>datetime2)
{
....
}
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