使用XElement更新XElement而不使用XDocument

Question

以下是我的xml：

<settings>
  <Element Name="a" Attribute="b" />
  <Element Name="b" Attribute="c" />
</settings>

这是我的密码：

const string SettingsFileName = "settings.xml";
XmlDocument xmlDocument = new XmlDocument();
const string RootNode = "settings";
const string elementName = "Element";
const string attributeName = "Name";
const string attributeValue = "b";

xmlDocument.Load(SettingsFileName);
XElement xElement = XElement.Load(new XmlNodeReader(xmlDocument));

var entry = from element in xElement.Elements(elementName)
   where (string)element.Attribute(attributeName) == attributeValue
   select element;

string[] values = { "Attribute", "d" };

xElement = entry.First<XElement>();

for (int i = 0; i < values.Length; i++)
{
    string name = values[i++];
    string value = "";
    if (i < values.Length)
        value = values[i];
    xElement.Attribute(name).Value=value;
}

我想使用xmlDocument更新XElement，最好不用XDocument。我好像错过了一步，因为这做不到：

xmlDocument.Save(SettingsFileName);

这有可能吗?如果有，怎么做？

Answer 1

弄明白了。以下是解决办法：

const string SettingsFileName = "settings.xml";
XmlDocument xmlDocument = new XmlDocument();
const string RootNode = "settings";
const string elementName = "Element";
const string attributeName = "Name";
const string attributeValue = "b";

xmlDocument.Load(SettingsFileName);
XElement xElement = XElement.Load(new XmlNodeReader(xmlDocument));

var entry = from element in xElement.Elements(elementName)
   where (string)element.Attribute(attributeName) == attributeValue
   select element;

string[] values = { "Attribute", "d" };

XElement xElement0 = entry.First<XElement>();

for (int i = 0; i < values.Length; i++)
{
    string name = values[i++];
    string value = "";
    if (i < values.Length)
        value = values[i];
    xElement0.Attribute(name).Value=value;
}
xmlDocument.LoadXml(xElement.ToString());
xmlDocument.Save(SettingsFileName);

Answer 2

我不是真的跟着“为什么”在这里。你做的事看起来很疯狂。只要坚持使用XDocument

var doc = XDocument.Load(SettingsFileName);

var attribute = doc
    .Descendants("Element")
    .Attributes("Attribute")
    .Single(x => x.Value == "b");

attribute.Value = "d";

doc.Save(SettingsFileName);