从xml读取javascript警报值

I have a JavaScript function code where I want to alert.

我有一个JavaScript功能代码,我想要提醒。

function msg(x,y)
{
 tempstr = x.value
if(tempstr.length>y)
 {
  alert(c_AcknowledgementText);
  x.value = tempstr.substring(0,y);
  }
}

Now I have an xml with below format:

现在我有一个格式如下的xml:

<?xml version="1.0" encoding="utf-8" ?>
<root>
    <key name="c_ContactUsHeading">Contact Us</key>
    <key name="c_AcknowledgementText">Comments can not be more than 250 characters.</key>
</root>

I want the JavaScript code so that the message shown in above alert can be read from above xml key name "c_AcknowledgementText".

我想要JavaScript代码,以便可以从上面的xml密钥名称“c_AcknowledgementText”中读取上面警告中显示的消息。

I hope it is clear about my problem.

我希望我的问题很清楚。

3 个解决方案

#1

Basically, you want to use XMLHttpRequest. Not sure what you're trying to do with tempstr, etc., though.

基本上,您想要使用XMLHttpRequest。不知道你正在尝试用tempstr等做什么。

function msg(x,y)
{
    tempstr = x.value;
    if(tempstr.length>y)
    {
        var req = new XMLHttpRequest();
        req.open('GET', '/file.xml', true);
        req.onreadystatechange = function (aEvt) {
            if (req.readyState == 4) {
                if(req.status == 200)
                {
                    var keys = req.responseXML.getElementsByTagName("key");
                    for(var i = 0; i < keys.length; i++)
                    {
                        var key = keys[i];
                        if(key.getAttribute("name") == "c_AcknowledgementText")
                        {
                            alert(key.textContent);
                            break;
                        }
                    }
                }
                else  
                    alert("Error loading page\n");

                  }
      };
      req.send(null);
      x.value = tempstr.substring(0,y);
    }
}

#2

First step is to get a DOM reference to the XML document. One way to do that is with Ajax. In this case, the server needs to respond with the Content-Type: text/xml header.

第一步是获取XML文档的DOM引用。一种方法是使用Ajax。在这种情况下,服务器需要使用Content-Type:text / xml标头进行响应。

$.ajax({
   type: "GET",
   url: "/path/to/my.xml",
   dataType: "xml",
   success: function(doc){
     var keys = doc.getElementsByTagName('key');
     if (keys.length > 0) {
       for (var i=0; i<keys.length; i++) {
         if (keys[i].getAttribute('name') == 'c_AcknowledgementText') {
           alert(keys[i].innerHTML);
         }
       }
     }
   }
 });

You may need some additional error-handling, etc.

您可能需要一些额外的错误处理等。

#3

You have to parse the XML file for c_AcknowledgementText (either in JavaScript or using a server side language and storing it into JavaScript as the page loads).

您必须为c_AcknowledgementText解析XML文件(使用JavaScript或使用服务器端语言并在页面加载时将其存储到JavaScript中)。

#1