小编Mat*_*ton的帖子

我正在重写一些使用XmlDocument来解析某些XML的代码.我想使用XmlReader来查看是否可以获得一些性能改进.XML的结构如下所示:

<items>
   <item id="1" desc="one">
      <itemBody date="2012-11-12" />
   </item>
   <item id="2" desc="two">
      <itemBody date="2012-11-13" />
   </item>
   <item id="3" desc="three">
      <itemBody date="2012-11-14" />
   </item>
   <item id="4" desc="four">
      <itemBody date="2012-11-15" />
   </item>
</items>

基本上,我需要遍历所有<item>元素.就像我说的,旧代码的工作原理如下:

XmlDocument document = new XmlDocument();

// load XML into XmlDocument
document.LoadXml(xml);

// use xpath to split into individual item
string xPath = @"items/item";
XmlNodeList nodeList = document.SelectNodes(xPath);

// loop through each item
for (int nodeIndex = 0; nodeIndex < nodeList.Count; nodeIndex++)
{
    // do something with …

我使用MVC4 Web API创建了一个RESTful Web服务.如果出现问题,我会抛出WebException.

throw new WebException("Account not found");

这是处理异常的客户端代码:

private void webClientPost_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
    {
        try
        {
            if (e.Error == null)
            {
                // Display result
                textBoxResult.Text = e.Result;
            }
            else
            {
                // Display status code
                if (e.Error is WebException)
                {
                    StringBuilder displayMessage = new StringBuilder();

                    WebException we = (WebException)e.Error;
                    HttpWebResponse webResponse = (System.Net.HttpWebResponse)we.Response;

                    displayMessage.AppendLine(webResponse.StatusDescription);

                    // Gets the stream associated with the response.
                    Stream receiveStream = webResponse.GetResponseStream();
                    Encoding encode = System.Text.Encoding.GetEncoding("utf-8");

                    // Pipes the stream to a higher level …