dojo dijit.form.DateTextBox constraints not working, datetextbox

问题

Hi I'm new to javascript and dojo. I'm trying to use two dijit DateTextBoxes with the drop-down calendars to establish a date range for a query on a database. I want to restrict the dates available, once the begin or end date has been selected, so that its impossible to pick an end date that is chronologically before the begin date, and vice versa. I'm trying to apply the example called 'changing constraints on the fly' (about half way down the page) from the dojo reference here: http://dojotoolkit.org/reference-guide/dijit/form/DateTextBox.html However, the constraints aren't working in my code. The only thing I'm really doing differently is using thetundra theme. Any suggestions would be greatly appreciated.

<html>

<head>
  <title></title>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6/dojo/resources/dojo.css">
  <link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6.0/dijit/themes/tundra/tundra.css" media="screen" />
  <script src="http://ajax.googleapis.com/ajax/libs/dojo/1.6.0/dojo/dojo.xd.js" data-dojo-config="isDebug: true, parseOnLoad: true"></script>

  <script type="text/javascript">
    dojo.require("dijit.form.DateTextBox");
  </script>
</head>

<body class="tundra">
  <div>
    <label for="fromDate">From:</label>
    <input id="fromDate" type="text" name="fromDate" data-dojo-type="dijit.form.DateTextBox" required="true" onChange="dijit.byId('toDate').constraints.min = arguments[0];" />
    <label for="toDate">To:</label>
    <input id="toDate" type="text" name="toDate" data-dojo-type="dijit.form.DateTextBox" required="true" onChange="dijit.byId('fromDate').constraints.max = arguments[0];" />

  </div>
</body>

</html>

回答1:

With the new, HTML5-conform attribute data-dojo-type introduced in Dojo 1.6, the way how widget attributes are parsed has changed as well (to validate in HTML5 too). Widget-specific attributes are now in an HTML attribute called data-dojo-props, in a JSON-style syntax.

To make your example work again, either put the onChange (and required) in data-dojo-props (note that you have to wrap a function around it):

 dojo.require("dijit.form.DateTextBox");

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6/dojo/resources/dojo.css">
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6.0/dijit/themes/tundra/tundra.css" media="screen" />
<script src="http://ajax.googleapis.com/ajax/libs/dojo/1.6.0/dojo/dojo.xd.js" data-dojo-config="isDebug: true, parseOnLoad: true"></script>


<body class="tundra">
  <label for="fromDate">From:</label>
  <input id="fromDate" type="text" name="fromDate" data-dojo-type="dijit.form.DateTextBox" data-dojo-props="onChange: function() {dijit.byId('toDate').constraints.min = arguments[0];}, required: true" />
  <label for="toDate">To:</label>
  <input id="toDate" type="text" name="toDate" data-dojo-type="dijit.form.DateTextBox" data-dojo-props="onChange: function() {dijit.byId('fromDate').constraints.min = arguments[0];}, required: true" />

Or you use the old dojoType instead of data-dojo-type, then the onChange attribute would be parsed. Note that it would not be HTML5-conform, but in my opinion more elegant.

回答2:

Searching for an effective date range and restrictions, where only can have a range in the past, adding the constraints max with echoing the date in this format Y-m-d, I manage to edit it like this, hopes this help.

dojo.require("dijit.form.DateTextBox");

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6/dojo/resources/dojo.css">
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6.0/dijit/themes/tundra/tundra.css" media="screen" />
<script src="http://ajax.googleapis.com/ajax/libs/dojo/1.6.0/dojo/dojo.xd.js" data-dojo-config="isDebug: true, parseOnLoad: true"></script>
<body class="tundra">
  <form>
    <label for="fromDate">From:</label>
    <input id="fromDate" type="text" name="fromDate" data-dojo-type="dijit.form.DateTextBox" data-dojo-props="onChange: function() {dijit.byId('toDate').constraints.min = arguments[0];}, required: true, constraints:{max:'<?PHP echo date(" Y-m-d "); ?>'} "
    />
    <label for="toDate">To:</label>
    <input id="toDate" type="text" name="toDate" data-dojo-type="dijit.form.DateTextBox" data-dojo-props="onChange: function() {dijit.byId('fromDate').constraints.min = arguments[0];}, required: true, constraints:{max:'<?PHP echo date(" Y-m-d "); ?>'} " />
    <button onclick="dijit.byId('fromDate').reset(); dijit.byId('toDate').reset();" type="reset">reset</button>
    <button type="">Generate</button>
  </form>

回答3:

I someday do some like:

dojo.require("dijit.form.DateTextBox");

some_function(minDate) {
  dijit.byId('toDate').constraints.min = minDate;

}

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6/dojo/resources/dojo.css">
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6.0/dijit/themes/tundra/tundra.css" media="screen" />
<script src="http://ajax.googleapis.com/ajax/libs/dojo/1.6.0/dojo/dojo.xd.js" data-dojo-config="isDebug: true, parseOnLoad: true"></script>

<body class="tundra">
  <input id="fromDate" type="text" name="fromDate" data-dojo-type="dijit.form.DateTextBox" data-dojo-props="onChange: some_function(this.value);">

I hope that it help you.

回答4:

I never had any luck with the attributes in the template like that.

I ended up just handling it on the function I run when either change:

I have one with an attach point of "startDatePicker" and another with "endDatePicker". Here I'm setting the endDatePicker to add constraints based on the new startDate someone selected so it's dynamic:

this.endDatePicker.constraints.min = new Date(startDate);
this.endDatePicker.constraints.max = new Date();

来源：https://stackoverflow.com/questions/8743757/dojo-dijit-form-datetextbox-constraints-not-working-datetextbox

标签

javascript

dojo

dijit.form