字符串与孩子节点的密文的比较

Question

在下面的代码中，我试图通过使用一个streamreader来进行文本分析。这是从文本文件中获取电子邮件地址。如果我没有电子邮件地址，组合框留空（index = -1）。如果我有我的XML文件中找到的电子邮件，那么我会选择它。否则，我将使用新的电子邮件地址将节点添加到我的xml文件中。

代码：

private void Textparsing() 
    {    
     using (StreamReader sr = new StreamReader(Masterbuildpropertiespath))     
      { 
       while (sr.Peek() >= 0) 
       if (line.StartsWith("Builder_Email:")) 
        { 
         string[] fields = line.Split('\t'); 
         string builderemail = fields[3]; 
         XmlDocument emailparse = new XmlDocument(); 
         emailparse.LoadXml(@"C:\GUI\buildermanageremail.xml"); 
         XmlNodeList emailnode = emailparse.GetElementsByTagName("value"); 
         if (string.IsNullOrEmpty(builderemail)) 
          comboBox1.SelectedIndex = -1; 
         else 
          foreach (XmlNode node in emailnode) 
          { 
           if (builderemail == node.InnerText) 
           { 
            int count = emailparse.SelectNodes("email/builderemail/builder").Count; 
            count--; 
            comboBox1.SelectedIndex = count; 
           } 
           else 
           { 
            //create main node 
            XmlNode abc = emailparse.CreateNode(XmlNodeType.Element, "builder", null); 

            //create the first child node 
            XmlNode value = emailparse.CreateElement("value"); 
            //set the value 
            value.InnerText = builderemail; 

            // add childes to father 
            //node.AppendChild(id); 
            abc.AppendChild(value); 

            // find the node we want to add the new node to 
            XmlNodeList l = emailparse.GetElementsByTagName("builderemail"); 
            // append the new node 
            l[0].AppendChild(abc); 
            // save the file 
            emailparse.Save(@"C:\GUI\buildermanageremail.xml"); 

            //then we populate the new updated xml file into the drop down list: 
            PopulateDDLFromXMLFile(); 
            int count = emailparse.SelectNodes("email/builderemail/builder").Count; 
            count--; 
            comboBox1.SelectedIndex = count; 
           } 
          } 

      } 

然而，我得到一个XmlException（在根级别的数据是无效的行1，位置1。）在这一行：

emailparse.LoadXml(@"C:\GUI\buildermanageremail.xml"); 

为什么会这样？

我XMLFILE：

<?xml version="1.0" encoding="utf-8"?> 
<email> 
    <builderemail> 
    <builder> 
     <value>abc@123.com</value> 
    </builder> 
    <builder> 
     <value>Others</value> 
    </builder> 
    </builderemail> 
    <manageremail> 
    <manager> 
     <value>abc@456.com</value> 
    </manager> 
    <manager> 
     <value>Others</value> 
    </manager> 
    </manageremail> 
</email> 

Answer 1

您应该使用的，而不是

 emailparse.LoadXml(@"C:\GUI\buildermanageremail.xml"); 

的

 emailparse.Load(@"C:\GUI\buildermanageremail.xml"); 

方法，因为loadXML的可以加载XML字符串，而不是文件。