的Javascript：讓子節點從爲XMLDocument

Question

假設我有以下的XMLHttpRequest（）的responseText存儲在var response：

{"success":true,"error":null,"body":"<modules>\n <total>5<\/total>\n <status>\n <id>0<\/id>\n <name>Archon<\/name>\n <portCount>14<\/portCount>\n <attached>true<\/attached>\n <\/status>\n <status>\n <id>1<\/id>\n <name>PC4<\/name>\n <portCount>0<\/portCount>\n <attached>false<\/attached>\n <\/status>\n <status>\n <id>2<\/id>\n <name>APC<\/name>\n <portCount>0<\/portCount>\n <attached>false<\/attached>\n <\/status>\n <status>\n <id>3<\/id>\n <name>SL1<\/name>\n <portCount>0<\/portCount>\n <attached>false<\/attached>\n <\/status>\n <status>\n <id>4<\/id>\n <name>SW5-1<\/name>\n <portCount>0<\/portCount>\n <attached>false<\/attached>\n <\/status>\n <status>\n <id>5<\/id>\n <name>ALC<\/name>\n <portCount>0<\/portCount>\n <attached>false<\/attached>\n <\/status>\n <status>\n <id>65<\/id>\n <name>VirtualModule<\/name>\n <portCount>16<\/portCount>\n <attached>true<\/attached>\n <\/status>\n<\/modules>\n"} 

在那之後，我做了以下提取體：

var json = JSON.parse(response); 
var xml = json.body; 

var xml中的對象是一個字符串，所以我試圖將其解析爲一個XMLDocument：

var xmlDoc = new DOMParser().parseFromString(xml, 'text/xml'); 

這裏的麻煩是我不知道如何到達子節點。我已經嘗試了以下來獲得總價值（應該是5）：

console.log(xmlDoc.getElementsByTagName("modules")[0].childNodes[0].nodeValue); 

但我得到的只是一個空白字符串。我覺得這應該是非常簡單的事情，但我根本沒有得到它。一旦我想要獲得各種名稱標籤的價值，我就更加無能爲力了。

我該如何去獲取子節點的值？

Answer 1

字符串不是空的。

console.log(xmlDoc.getElementsByTagName("modules")[0].childNodes[0].nodeValue.charCodeAt(0)); 

10 

這是回車的ASCII代碼。你可以看看here瞭解更多關於childNodes和children的信息。 xmlDoc.children將爲您提供一個HTML集合，您可以遍歷並從中提取信息。

注意：我建議編輯問題的標題是爲那些誰可能會看到它在未來更有幫助。

Answer 2

按照要求，請嘗試下面的代碼。

var response = {"success":true,"error":null,"body":"<modules>\n <total>5<\/total>\n <status>\n <id>0<\/id>\n <name>Archon<\/name>\n <portCount>14<\/portCount>\n <attached>true<\/attached>\n <\/status>\n <status>\n <id>1<\/id>\n <name>PC4<\/name>\n <portCount>0<\/portCount>\n <attached>false<\/attached>\n <\/status>\n <status>\n <id>2<\/id>\n <name>APC<\/name>\n <portCount>0<\/portCount>\n <attached>false<\/attached>\n <\/status>\n <status>\n <id>3<\/id>\n <name>SL1<\/name>\n <portCount>0<\/portCount>\n <attached>false<\/attached>\n <\/status>\n <status>\n <id>4<\/id>\n <name>SW5-1<\/name>\n <portCount>0<\/portCount>\n <attached>false<\/attached>\n <\/status>\n <status>\n <id>5<\/id>\n <name>ALC<\/name>\n <portCount>0<\/portCount>\n <attached>false<\/attached>\n <\/status>\n <status>\n <id>65<\/id>\n <name>VirtualModule<\/name>\n <portCount>16<\/portCount>\n <attached>true<\/attached>\n <\/status>\n<\/modules>\n"}; 
 

 
var xml = response.body; 
 

 
var xmlDoc = new DOMParser().parseFromString(xml, 'text/xml'); 
 

 
var allChildNodes = xmlDoc.documentElement.childNodes; 
 

 
var total = allChildNodes[1].textContent; 
 

 
alert(total);