jquery datepicker不适用于动态创建的html

问题描述

我正在动态创建几个带有内部控件的 div.其中两个控件应该是日期选择器.但由于某种原因，它们没有显示(仅显示输入文本)如果我创建静态 html，它就可以工作，但当我使用动态 html 时就不行.

I'm creating dynamically a couple of div with inner controls. Two of those controls should be datepickers. But for some reason they are not showing (only input text are shown) It works if I create static html, but not when I'm using dynamic one.

这是我用来生成 HTML 的代码(我可以看到 div)

This is the code I'm using to generate the HTML (I can see the div)

var ShowContainerDiv = document.createElement('DIV');

var btnShowDiv = document.createElement('DIV');
btnShowDiv.id = 'btnShowDiv ';
btnShowDiv.title = 'Change';
btnShowDiv.index = 120;

var lblShow = document.createElement('label')
lblShow.htmlFor = "btnShowDiv";
lblShow.appendChild(document.createTextNode('Show'));
btnShowDiv.appendChild(lblShow );
btnShowDiv.onclick = function () {
    dropdown.style.visibility = "visible";
};

var dropdown = document.createElement('DIV');
dropdown.style.backgroundColor = 'white';
dropdown.style.borderStyle = 'solid';
dropdown.style.borderWidth = '2px';
dropdown.style.cursor = 'pointer';
dropdown.style.textAlign = 'left';
dropdown.style.width = '150px';

var chkRed = document.createElement("input");
chkRed.type = "checkbox";
chkRed.id = "chkRed";
chkRed.value = "Red";
chkRed.checked = false;
var lblRed = document.createElement('label')
lblRed.htmlFor = "chkRed";
lblRed.style.color = "#F00";
lblRed.appendChild(document.createTextNode('Red'));

var chkYellow = document.createElement("input");
chkYellow.type = "checkbox";
chkYellow.id = "chkYellow";
chkYellow.value = "Yellow";
chkYellow.checked = false;
var lblYellow = document.createElement('label')
lblYellow.htmlFor = "chkYellow";
lblYellow.style.color = "#FF0";
lblYellow.appendChild(document.createTextNode('Yellow'));

var chkGreen = document.createElement("input");
chkGreen.type = "checkbox";
chkGreen.id = "chkGreen";
chkGreen.value = "Green";
chkGreen.checked = false;
var lblGreen = document.createElement('label')
lblGreen.htmlFor = "chkGreen";
lblGreen.style.color = "#0F0";
lblGreen.appendChild(document.createTextNode('Green'));

var dateFrom = document.createElement("input");
dateFrom.id = "txtDateFrom";
dateFrom.type = "text";
dateFrom.className = "datepicker";
dateFrom.style.width = "70px";
dateFrom.readonly = "readonly";
var lblDateFrom = document.createElement('label')
lblDateFrom.htmlFor = "txtDateFrom";
lblDateFrom.appendChild(document.createTextNode('From'));

var dateTo = document.createElement("input");
dateTo.id = "txtDateTo";
dateTo.type = "text";
dateTo.className = "datepicker";
dateTo.style.width = "70px";
dateTo.readonly = "readonly";
var lblDateTo = document.createElement('label')
lblDateTo.htmlFor = "txtDateTo";
lblDateTo.appendChild(document.createTextNode('To'));

var btnDone = document.createElement("input");
btnDone.type = "button";
btnDone.name = "btnDone";
btnDone.value = "Done";
btnDone.onclick = function () {
    dropdown.style.visibility = "hidden";
};

dropdown.appendChild(chkRed);
dropdown.appendChild(lblRed);
dropdown.appendChild(document.createElement("BR"));
dropdown.appendChild(chkYellow);
dropdown.appendChild(lblYellow);
dropdown.appendChild(document.createElement("BR"));
dropdown.appendChild(chkGreen);
dropdown.appendChild(lblGreen);
dropdown.appendChild(document.createElement("BR"));
dropdown.appendChild(dateFrom);
dropdown.appendChild(document.createElement("BR"));
dropdown.appendChild(dateTo);
dropdown.appendChild(document.createElement("BR"));
dropdown.appendChild(btnDone);

ShowContainerDiv.appendChild(btnShowDiv);
ShowContainerDiv.appendChild(dropdown);

g.event.addDomListener(btnShowDiv, 'click', function () {
    dropdown.visible = true;
    dropdown.style.visibility = "visible";
});

g.event.addDomListener(btnDone, 'click', function () {
    dropdown.visible = false;
    dropdown.style.visibility = "hidden";
});

map.controls[g.ControlPosition.TOP_RIGHT].push(ShowContainerDiv);

然后在一个 .js 文件中我有这个(我检查并包含该文件)

Then in a .js file I have this (I checked and I'm including the file)

$(document).ready(function () {
    $(".datepicker").datepicker({
        dateFormat: 'yy/m/d',
        firstDay: 1,
        changeMonth: true,
        changeYear: true,
        showOn: 'both',
        autosize: true,
        buttonText: "Select date",
        buttonImage: '../Content/images/calendar.png',
        buttonImageOnly: true
    });
});

为什么没有显示日期选择器?

Why the datepicker is not showing up?

推荐答案

写的时候

$(document).ready(function () {
    $(".datepicker").datepicker({...});
});

该片段在页面加载后立即执行.因此，您的动态日期选择器还不存在.您需要在每个新插入的元素上调用 $(aSuitableSelector).datepicker(...) .首先，使用 var 来保存您的选项:

This fragment is getting executed right after the page has loaded. Therefore, your dynamic datepickers are not there yet. You need to call $(aSuitableSelector).datepicker(...) on each newly-inserted element. First, use a var to hold your options:

var datePickerOptions = {
    dateFormat: 'yy/m/d',
    firstDay: 1,
    changeMonth: true,
    changeYear: true,
    // ...
}

这让你可以写

 $(document).ready(function () {
    $(".datepicker").datepicker(datePickerOptions);
 });

然后写

 // right after appending dateFrom to the document ...
 $(dateFrom).datepicker(datePickerOptions);

 //...

 // right after appending dateTo ...
 $(dateTo).datepicker(datePickerOptions);

您还可以使用 JQuery 的功能来监听 DOM 更改来避免必须对新插入的元素应用 JS 魔法——但我认为这不值得.

You can also use JQuery's ability to listen to DOM changes to avoid having to apply JS magic to newly-inserted elements -- but I do not think it is worth it.

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