解析XML

Question

XML示例：
            <Record>
              <Field>
                <FieldName>SeverityDesc</FieldName>
                <FieldValue>Moderate</FieldValue>
              </Field>
              <Field>
                <FieldName>StencilName</FieldName>
                <FieldValue>Car - Internal - Portrait</FieldValue>
              </Field>
              <Field>
                <FieldName>ServerStencilImagePath</FieldName>
                <FieldValue>\\tbs-vm-hosted\TBS\BCA\Stencils\Car-Internal-Portrait.png</FieldValue>
              </Field>
              <Field>
                <FieldName>X</FieldName>
                <FieldValue>240</FieldValue>
              </Field>
              <Field>
                <FieldName>Y</FieldName>
                <FieldValue>120</FieldValue>
              </Field>
           </Record>
用户要传两个参数过来，分别是：XPathNavigator和StencilName(StencilName也就是一个节点里的内容)，现在我想写一个方法，运用这两个参数，获取StencilName、X、Y对应的值(也就是Car - Internal - Portrait、240和120)，应该怎么写？

Answer 1

XPathNavigator 是什么呢？没有表述清楚奥！

Answer 2

    string xml = @"<root>
         <Field>
  <FieldName>SeverityDesc</FieldName>
  <FieldValue>Moderate</FieldValue>
  </Field>
  <Field>
  <FieldName>StencilName</FieldName>
  <FieldValue>Car - Internal - Portrait</FieldValue>
  </Field>
  <Field>
  <FieldName>ServerStencilImagePath</FieldName>
  <FieldValue>\\tbs-vm-hosted\TBS\BCA\Stencils\Car-Internal-Portrait.png</FieldValue>
  </Field>
  <Field>
  <FieldName>X</FieldName>
  <FieldValue>240</FieldValue>
  </Field>
  <Field>
  <FieldName>Y</FieldName>
  <FieldValue>120</FieldValue>
  </Field></root>";
            XElement xmlPage = XElement.Parse(xml);
            var query = from x in xmlPage.Descendants("Field")
                        where new string[] { "StencilName","X", "Y" }.Contains(x.Element("FieldName").Value)
                        select x.Element("FieldValue").Value;
            foreach (var q in query)
            {
                Console.WriteLine(q);
            }
根据参数生成new string[] { "StencilName","X", "Y" }

Answer 3

XPathNavigator 的 Select 方法返回的 XPathNodeIterator 遍历选定的节点。
http://msdn.microsoft.com/en-us/library/0ea193ac.aspx