日期验证 [英] date validation

问题描述

任何一个可以告诉我，code，以验证在注册表格的日期字段（SHD也验证天的闰年，没有每个月

can any one tell me the code to validate the date field in signup form(which shd also validate the leap year and no of days in each month

推荐答案

这取决于输入，但假设你有整个日期字符串输入，那么你可以尝试这样的：

That depends on the input but suppose you have a string input for the whole date then you could try something like:

try
{
     DateTime parsedDate = DateTime.Parse(incomingDateString);
}
catch
{
     throw new Exception("Incoming Date string could not be parsed as a DateTime");
}

另外，如果你有三个整数从表单来的，然后你将与

Alternatively if you have three integers as strings coming in from the form then you would replace the DateTime.Parse with

     DateTime parsedDate = new DateTime(Int32.Parse(yearString), Int32.Parse(MonthString), Int32.Parse(DayString));

和允许DateTime构造带的分析当月天的细节关怀和闰年。你可能会更加复杂和使用Int32.TryParse以及如果多数民众赞成你所需要的空字符串提供更具体的错误信息和检查。

and allow the DateTime constructor take care of the details of analyzing days of month and leap years. You could be more sophisticated and use Int32.TryParse and provide more specific error messages and checks for null strings if thats what you need.

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