使用XmlWriter附加到XML文件

本文关键字：XML 文件 XmlWriter 使用 | 更新日期: 2023-09-27 18:23:37

我使用XmlDocument和XmlWriter将XML附加到现有文件中，但下面的尝试抛出了一个我不理解的异常

此文档已具有"DocumentElement"节点。

//Append to xml file
XmlDocument doc = new XmlDocument();
doc.Load(@"c:''test.xml");
using (XmlWriter xmlWrite = doc.CreateNavigator().AppendChild())
{
    xmlWrite.WriteStartElement("image name=",Name);
    xmlWrite.WriteElementString("width", widthValue[1]);
    xmlWrite.WriteElementString("Height", heightValue[1]);
    xmlWrite.WriteElementString("file-size", FileSizeValue[1]);
    xmlWrite.WriteElementString("file-format", FileFormatValue[1]);
    xmlWrite.WriteElementString("resolution", ResolutionValue[1]);
    xmlWrite.Close();
}

这是我的示例test.xml

<job-metadata>
    <slug>730s_Sales/CupWinner_0111</slug>
    <locations>Africa</locations>
    <primary-location>Africa</primary-location>
    <reporter>Leigh Sales</reporter>
    <genre>Current</genre>
    <copyright>CBS</copyright>
    <autopublish>true</autopublish> 
</job-metadata>

我正试图在下面这样的xml中添加

<job-metadata>
    <slug>730s_Sales/CupWinner_0111</slug>
    <locations>Africa</locations>
    <primary-location>Africa</primary-location>
    <reporter>Leigh Sales</reporter>
    <genre>Current</genre>
    <copyright>CBS</copyright>
    <autopublish>true</autopublish> 
    <image name="557684_20111101-730s_SalesCupWinner_0111_80x60.jpg">
        <width>80</width>
        <height>60</height>
        <file-size>7045</file-size>
        <file-format>JPEG Baseline</file-format>
        <resolution>72</resolution>
        <custom-name>newsthumbnail</custom-name>
    </image>
</job-metadata>

使用XmlWriter附加到XML文件

如果您使用的是.net 3.5版，那么使用XML数据对用户来说更好。LINQ To XML。

http://www.codeproject.com/Articles/24376/LINQ-to-XML

或

使用XPath和XmlDocument（C#）操作XML数据

或

文章：如何附加到大型XML文件

我认为你需要像这个一样将节点附加到你的xmldocuemnt

//add to elements collection
doc.DocumentElement.AppendChild(node);

你需要做一些类似的事情

XmlDocument xmlDoc=new XmlDocument();
xmlDoc.Load("F:/Documents and Settings/Administrator/Desktop/Account.xml");
XmlElement subRoot=xmlDoc.CreateElement("User");
//UserName
XmlElement appendedElementUsername=xmlDoc.CreateElement("UserName");
XmlText xmlTextUserName=xmlDoc.CreateTextNode(txtUsrName.Text.Trim());
appendedElementUsername.AppendChild(xmlTextUserName);
subRoot.AppendChild(appendedElementUsername);
xmlDoc.DocumentElement.AppendChild(subRoot);
//Email
XmlElement appendedElementEmail=xmlDoc.CreateElement("Email");
XmlText xmlTextEmail=xmlDoc.CreateTextNode(txtEmail.Text.Trim());
appendedElementEmail.AppendChild(xmlTextEmail);
subRoot.AppendChild(appendedElementEmail);
xmlDoc.DocumentElement.AppendChild(subRoot);
xmlDoc.Save("F:/Documents and Settings/Administrator/Desktop/Account.xml");if(!File.Exists("F:/Documents and Settings/Administrator/Desktop/Account.xml"))
{
XmlTextWriter textWritter=new XmlTextWriter("F:/Documents and Settings/Administrator/Desktop/Account.xml", null); 
textWritter.WriteStartDocument();
textWritter.WriteStartElement("USERS");
textWritter.WriteEndElement();
textWritter.Close();
}

XmlDocument xmlDoc=new XmlDocument();
xmlDoc.Load("F:/Documents and Settings/Administrator/Desktop/Account.xml");
XmlElement subRoot=xmlDoc.CreateElement("User");
//UserName
XmlElement appendedElementUsername=xmlDoc.CreateElement("UserName");
XmlText xmlTextUserName=xmlDoc.CreateTextNode(txtUsrName.Text.Trim());
appendedElementUsername.AppendChild(xmlTextUserName);
subRoot.AppendChild(appendedElementUsername);
xmlDoc.DocumentElement.AppendChild(subRoot);
//Email
XmlElement appendedElementEmail=xmlDoc.CreateElement("Email");
XmlText xmlTextEmail=xmlDoc.CreateTextNode(txtEmail.Text.Trim());
appendedElementEmail.AppendChild(xmlTextEmail);
subRoot.AppendChild(appendedElementEmail);
xmlDoc.DocumentElement.AppendChild(subRoot);
xmlDoc.Save("F:/Documents and Settings/Administrator/Desktop/Account.xml");

结果是这样的：

</USERS>
<User>
<UserName>Buggaya</UserName> 
<Email>Buggaya@gmail.com</Email> 
</User>
</USERS>

原始帖子：附加在xml文档中

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