Question

这就是我在视图中使用日期选择器的方式：

<input type="text" class="form-control datepicker" name="ChartStartDate1" id="dailySummaryDt" data-bind="datePicker: targetDate, minDate: viewModel.datePickerMinDate()" />
<span id="temp" data-bind="text:viewModel.datePickerMinDate()"></span>

带有span的最后一行完美无缺。我创建了这个范围只是为了检查我的模型是否具有正确的值。但是日期选择器并未获得该值，我不确定原因。

日期选择器的minDate未设置;换句话说，我无法设置日期选择器的最短日期。请注意以下内容正常：

minDate: new Date()  or
minDate:new Date('01/10/2015')

这不起作用。如果我尝试调试我的绑定处理程序，则date的值在所有这些情况下都是未定义的或无效的：

minDate: new Date(viewModel.datePickerMinDate())  OR
minDate: viewModel.datePickerMinDate()  OR
minDate: viewModel.datePickerMinDate

这是我的绑定处理程序的代码

ko.bindingHandlers.datePicker = {
    init: function (element, valueAccessor, allBindings) {
        var minDate = moment(allBindings.get('minDate') || ''),
            maxDate = moment(allBindings.get('maxDate') || ''),
            options = {
                minDate: minDate.isValid() ? minDate.toDate() : undefined,
                maxDate: maxDate.isValid() ? maxDate.toDate() : undefined,
                onClose: function () { if ($.fn.valid) $(this).valid(); },
                dateFormat: allBindings.get('format') || GGS.dateFormats.pickerDateFormat
            },
            dp = $(element).datepicker(options);
        console.log('minDate ' + minDate + '  ' + moment.utc($("#ChartStartDate").val()).format('MM/DD/YYYY'));
        dp.change(function () {
            var observable = valueAccessor(),
                unwrapped = ko.unwrap(observable)
                current = unwrapped ? moment.utc(unwrapped) : null,
                raw = dp.datepicker("getDate"),
                localValue = raw ? moment(raw) : null, //n.b. not UTC; stupid jQuery UI
                value = localValue ? moment.utc([localValue.year(), localValue.month(), localValue.date()]) : null //extract the date part to a UTC date
                if (!value || (!current || !current.isSame(value, 'day'))) {
                    console.log('value = ' + value.toDate());
                     observable(value ? value.toDate() : value);
                }
        });
    },
    update: function (element, valueAccessor) {
        var dp = $(element);
        var observable = valueAccessor(),
            unwrapped = ko.unwrap(observable),
            value = unwrapped ? moment.utc(unwrapped) : null,
            localValue = value ? moment([value.year(), value.month(), value.date()]) : null //make sure that jQuery UI shows the date we expect, rather than trying to convert to local time
        ;
        dp.datepicker("setDate", localValue ? localValue.toDate() : localValue);
        dp.blur();        
    },
}

Answer 1

正如评论中提到的那样，你只需要这样做

查看：

<input type="text" class="form-control datepicker" data-bind="datePicker:targetDate, minDate:datePickerMinDate()" /> <span id="temp" data-bind="text:targetDate"></span>

<强>视图模型：

var ViewModel = function () { var self = this; self.targetDate = ko.observable('01/10/2015'); self.datePickerMinDate = ko.observable('01/10/2015'); }; //In bindingHandler update update: function (element, valueAccessor) { var dp = $(element); var observable = valueAccessor(), unwrapped = ko.unwrap(observable) //here you have to format the Date before setting $(element).datepicker("setDate", unwrapped); dp.blur(); }

工作小提琴以供参考 here

minDate未在日期选择器中设置

1 个答案: