我想访问一个jQuery对象,这恰好是一个输入文本框来做一些验证并添加日期选择器,但不幸的是我无法这样做。从自定义绑定处理程序中访问jQuery对象
我正在与KnockoutJS合作。
如果'Datatype'碰巧是'Date'或'Datetime',我想访问'input'并调用它的datepicker()。但每当我尝试使用.closest('td').next('td').html()
进行搜索时,我都会得到一个null(来自自定义绑定内)。试一试,以便我可以根据数据类型'td'在输入上调用datetimepicker构造函数。
下面是我试图用
的jsfiddle工作小提琴:http://jsfiddle.net/sourabhtewari/nkkt88v2/2/
var format = function (str, col) {
col = typeof col === 'object' ? col : Array.prototype.slice.call(arguments, 1);
return str.replace(/\{\{|\}\}|\{(\w+)\}/g, function (m, n) {
if (m == "{{") {
return "{";
}
if (m == "}}") {
return "}";
}
return col[n];
});
};
var data = ko.observableArray([{
paramKey: ko.observable('keyName'),
paramValue: ko.observable('Test1'),
dataType: ko.observable('Date')
}]);
var ParamConstr = function (key, value, dataType) {
return {
ParamKey: ko.observable(key),
ParamValue: ko.observable(value),
DataType: ko.observable(dataType)
};
};
var my = my || {};
function Generator() { };
Generator.prototype.rand = Math.floor(Math.random() * 26) + Date.now();
Generator.prototype.getId = function() {
return this.rand++;
};
var idGen = new Generator();
//var ParamData = ko.observableArray([]);
my.viewModel = {
ParamData : ko.observableArray([]),
addParam: function() {
this.ParamData.push(new ParamConstr("$$" + "key1", "value1","Date"));
}};
ko.bindingHandlers.hidden = {
update: function (element, valueAccessor) {
ko.bindingHandlers.visible.update(element, function() { return !ko.utils.unwrapObservable(valueAccessor()); });
}
};
ko.bindingHandlers.clickToEdit = {
init: function (element, valueAccessor, allBindingsAccessor, viewModel, context) {
var observable = valueAccessor(),
link = document.createElement("a"),
input = document.createElement("input");
var id = idGen.getId();
input.setAttribute("id", id);
element.appendChild(link);
element.appendChild(input);
console.log(document.getElementById(id).id);
var dataType = $(format("#{0}", id)).parent().next('td').html();
//.parent().next().html();
//.closest('td').next('td').html().toString();
console.log(dataType);
switch ($(format("#{0}", id)).parent().next('td').html()) {
case "Datetime":
$(format("#{0}", id)).datetimepicker();
break;
case "Date":
$(format("#{0}", id)).datetimepicker({
timepicker: false,
format: 'Y/m/d'
});
break;
}
observable.editing = ko.observable(false);
ko.applyBindingsToNode(link, {
text: observable,
hidden: observable.editing,
click: observable.editing.bind(null, true)
});
ko.applyBindingsToNode(input, {
value: observable,
visible: observable.editing,
hasfocus: observable.editing,
event: {
keyup: function (data, event) {
//if user hits enter, set editing to false, which makes field lose focus
if (event.keyCode === 13) {
input.blur();
observable.editing(false);
return false;
}
//if user hits escape, push the current observable value back to the field, then set editing to false
else if (event.keyCode === 27) {
observable.valueHasMutated();
observable.editing(false);
return false;
}
}
}
});
}
};
ko.applyBindings(my.viewModel);
HTML:
<div>
<button id="InputSubmitBtn" type="submit" class="btn btn-custom" data-bind="click: addParam"><span class="glyphicon glyphicon-plus-sign"></span> Add</button>
</div>
<table class="table table-hover table-condensed">
<thead>
<tr>
<th>Name</th>
<th>Value</th>
<th>Data type</th>
</tr>
</thead>
<tbody data-bind="foreach: ParamData">
<tr>
<td data-bind="text: ParamKey" style="width: 20%"></td>
<td data-bind="clickToEdit: ParamValue" data-text="" style="width: 20%"></td>
<td data-bind="text: DataType" style="width: 20%"></td>
</tr>
</tbody>
</table>
任何帮助,我怎么能解决这个问题将是巨大的!
如果你的目标是让数据类型,那么你可以使用allbindingaccessors参数来实现它。 修改您的HTML到
这样做的工作。谢谢。 – Navyseal
很高兴听到它的工作。快乐的编码 –