Primefaces AJAX回调参数的JavaScript [英] Primefaces ajax callback with parameter to javascript
问题描述
我在努力直接以打开新的一页，写的bean属性的内容到新的页面发送Primefaces bean属性的JavaScript。
I am struggling to send a Primefaces bean property to javascript directly in order to open a new page and write the content of the bean property into the new page.
我使用Primefaces 4.0。
I am using Primefaces 4.0.
我有这样一个命令按钮：
I have a command button like this:
<p:commandButton id="buttonId" update="buttonId, otherComponentId"
value="press me" process="@this" actionListener="#{homeController.myMethod}"
oncomplete="handleComplete(xhr, status, args)">
</p:commandButton>
在handleComplete的javascript函数参数是不确定的，但不是XHR和地位。 javascript函数的定义：
In handleComplete javascript function args is undefined, but not xhr and status. javascript function definition:
function handleComplete(xhr, status, args){
var w = window.open();
w.document.open();
alert(xhr.responseText.substring(100));
alert(status);
alert(args);
var d = '<head></head><body>'+ args.firstParam +'<body>';
w.document.write(d);
w.document.close();
}
第一个警报它给我的网页，第二个语法错误， 而错误是：未捕获的类型错误：无法读取属性firstParam未定义
first alert it's giving me the page, the second one parse error, and the error is: Uncaught TypeError: Cannot read property 'firstParam' of undefined
我要在args设置为传递一个字符串是这样的：
I want to pass in the args a string like this:
public String MyMethod() {
RequestContext context = RequestContext.getCurrentInstance();
context.addCallbackParam("firstParam", "my string");
return "";
}
和访问它的JavaScript与 args.firstParam 。
and access it in javascript with args.firstParam .
该方法被调用，（我有一些printscreens这项工作。）
the method is called, (I have some printscreens that work.)
我要尝试这种方式，而不是文字设置成
I have to try this way and not to set the text into a
<h:outputText id="myText" escape="false" rendered="true"
value="#{homeController.property}" />
，然后得到，因为我将与innerHTML的得到的将不会是相同的bean中的字符串变量这个元素的innerHTML。此方法有效，但并不如我所愿。我很奇怪，为什么ARGS对象是不确定的或者我怎么回事，能得到bean的属性从JavaScript管理。谢谢你。
and then get innerHTML of this element because what I will get with innerHTML will not be the same as the string variable in the bean. This method works but not as I would like. I am wondering why the args object is undefined or how else could I get the bean property manageable from javascript. Thank you.
推荐答案
首先你要确保你的方法被调用。 把一些日志记录或调试方法，如果它被称为正确。
First thing you should make sure that your method is called. Put some logging or debug your method if it's called correctly.
如果不是你可能要添加的过程属性进按钮， 并设置过程分为@this
If not you might want to add the process attribute into the button, and set the process into @this.
如果在这个阶段，你的方法被调用，那么你必须在你的页面验证错误。
If in this stage your method is called, then you have a validation error in your page.
和我所说的不是行动我的ActionListener的方法，并把（）到底。 <一href="http://stackoverflow.com/questions/3909267/differences-between-action-and-actionlistener">Differences行动之间的ActionListener
And I would call my methods in actionListener not in action, and put the () in the end. Differences between action and actionListener
请尝试以下
<p:commandButton id="buttonId"
value="press me" actionListener="#{homeController.myMethod()}"
process="@this"
oncomplete="handleComplete(xhr, status, args)">
</p:commandButton>
由于您的错误是firstParam是不确定的，而不是ARGS是不确定的，你可能想确保你的firstParam值不为null！
Since your error is "firstParam" is undefined and not the "args" is undefined, you might want to make sure that your firstParam value is not null !.
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