我想检查DatePicker
的值是否为空(==框中没有日期)。
默认情况下,Text
的{{1}}设置为DatePicker
,因此我无法使用Select a date
属性进行检查。
答案 0 :(得分:9)
DatePicker类有一个属性SelectedDate,可用于获取或设置所选日期。如果没有选中,则表示其值为null。
>>> py_compile.compile('test.py')
File "hello_world.py", line 1
print "Hello World")
^
SyntaxError: invalid syntax
答案 1 :(得分:2)
虽然DatePicker
的默认文本为Select a date
,但您可以使用Text
属性来Text.Length
进行检查。或者像这样检查SelectedDate
属性:
if (datePicker.Text.Length == 0)
{
//Do your stuff
}
或者:
if (datePicker.SelectedDate == null)
{
//Do your stuff
}
答案 2 :(得分:0)
to = $('#to');// hopefully you defined this yourself and the options
//I am writing coffeeScript here, below I will add pure JS
if to.datepicker('getDate') == null
//basically do your stuff here -
//using month_day_year_string (m_d_y_s) func to format a date object here and add 6 to the date's year so passed e.g. 2014 gives 2020.
return to.datepicker('option', 'minDate', getDate(this), to.datepicker('option', 'maxDate', m_d_y_s(getDate(this), 6)))
return// I have this on a call back so I am returning from the call back
在纯JS中,它简直就是
var to = $('#to');// hope you defined the options and datepicker
if (to.datepicker('getDate') === null) {
#do your stuff - I have an example code below as I needed this check in a callback
return to.datepicker('option', 'minDate', getDate(this), to.datepicker('option', 'maxDate', m_d_y_s(getDate(this), 6)));
}
return;// if on a call back e.g. onChange or onRender.