閒來無事寫個程序來讀取xml文本內容。使用微軟提供的接口讀取xml數據不能像jQuery和CSS那樣方便的讀取HTML元素，於是自己寫個程序來實現類似的功能，代碼如下：
public class XmlReader
{
/// <summary>
/// 讀取xml節點值
/// </summary>
/// <param name="xmlStr">xml字符串</param>
/// <param name="names">樹形節點</param>
/// <returns></returns>
public static List<string> ReadFromXmlStr(string xmlStr, params string[] names)
{
XDocument xdoc = XDocument.Parse(xmlStr);
return Read(xdoc, names);
}
/// <summary>
/// 讀取xml節點值
/// </summary>
/// <param name="path">xml文檔路徑</param>
/// <param name="names">樹形節點</param>
/// <returns></returns>
public static List<string> ReadFromXmlPath(string path, params string[] names)
{
XDocument xdoc = XDocument.Load(path);
return Read(xdoc, names);
}
/// <summary>
/// 讀取xml節點值
/// </summary>
/// <param name="xdoc">xml文檔對象</param>
/// <param name="names">樹形節點</param>
/// <returns></returns>
public static List<string> Read(XDocument xdoc, params string[] names)
{
if (xdoc == null || xdoc.Root == null)
{
return null;
}
XElement xroot = xdoc.Root;
List<string> CatchedValues = new List<string>();
CatchElement(xroot, 0, CatchedValues, names);
return CatchedValues;
}
private static void CatchElement(XElement element, int index, List<string> CatchedValues, params string[] names)
{
if (element.Name.ToString() == names[index])
{
if (index == names.Length - 1)
{
CatchedValues.Add(element.Value);
}
else
{
if (element.HasElements)
{
index++;
foreach (XElement child in element.Elements())
{
CatchElement(child, index, CatchedValues, names);
}
}
}
}
else
{
if (element.HasElements)
{
foreach (XElement child in element.Elements())
{
CatchElement(child, index, CatchedValues, names);
}
}
}
}
public static XDocument GetXDocument(string path)
{
return XDocument.Load(path);
}
public static XDocument GetXDcoment(string xmlStr)
{
return XDocument.Parse(xmlStr);
}
}
用於測試的xml文件內容如下：
<?xml version="1.0" encoding="utf-8" ?>
<Book>
<A>
<E>nihao</E>
</A>
<B>
<C>aaa</C>
<D>
<E>good</E>
</D>
</B>
</Book>
測試代碼如下：
public static void Test()
{
string path = @"D:\abc.xml";
List<string> results = XmlReader.ReadFromXmlPath(path, "E");
Console.WriteLine("xml節點路徑爲 E 的節點的內容：");
foreach (string r in results)
{
Console.WriteLine(r);
}
Console.WriteLine("xml節點路徑爲 B->E 的節點內容：");
List<string>results2=XmlReader.ReadFromXmlPath(path,"B","E");
foreach (string r in results2)
{
Console.WriteLine(r);
}
}
運行結果如下：
