更新XML与LINQ属性XML
问题描述:
我有一个这样的XML文件:更新XML与LINQ属性XML
<URUN id="1" uName="KT-08" thumb="images_/berjer_/small_/17.jpg" image="images_/berjer_/17.jpg" desc="" />
<URUN id="2" uName="KT-08" thumb="images_/berjer_/small_/18.jpg" image="images_/berjer_/18.jpg" desc="" />
<URUN id="3" uName="KT-08" thumb="images_/berjer_/small_/19.jpg" image="images_/berjer_/19.jpg" desc="" />
<URUN id="4" uName="KT-08" thumb="images_/berjer_/small_/20.jpg" image="images_/berjer_/20.jpg" desc="" />
删除元素后为前:ID = 1;之后,它就像ID = 2,ID = 3 ID = 4。我的问题是我想更新XML像id = 1 id = 2和id = 3。我怎样才能做到这一点?
答
如果我理解你的要求......
int i = 1;
foreach (var e in elem.Elements("URUN")) {
e.SetAttributeValue("id", i);
i++;
}
这假定您已经删除了第一URUN元素(ID = 1),要更新其余的有顺序ID从1开始。
答
XElement urunlur = XDocument.Load("filepath.xml").Root;
var uruns = urunlur.Elements("URUN");
//the next line will throw an exception if
// (a) a URUN element exists without an id attribute
// (b) there is no URUN element with an id = 1
// (c) a URUN element exists with a non-integer id
uruns.Single(x => int.Parse(x.Attribute("id").Value) == 1).Remove();
var count = uruns.Count();
var sorted = uruns.OrderBy(x => x.Attribute("id").Value);
for(int i = 0; i<count;i++)
{
sorted.ElementAt(i).SetAttributeValue("id",i+1);
}
+0
只要使用'foreach' – abatishchev 2011-03-11 08:36:37
我想你错过了一些你的示例XML ... – 2011-03-10 23:03:30