c# – 使用xmlwriter附加xml文件

概述感谢早先建议使用“ XMLWriter”,每次创建新的xml文件,所以我使用xmldoc加载xml文件然后追加到该文件中,这是我的代码,但它抛出异常说“这个文档已经有’DocumentElement’节点.” //Append to xml file XmlDocument doc = new XmlDocument(); doc.Load(@ 感谢早先建议使用“ XMLWriter”,每次创建新的xml文件,所以我使用xmldoc加载xml文件然后追加到该文件中,这是我的代码,但它抛出异常说“这个文档已经有’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>

我试图像下面的xml一样追加

<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>

提前致谢

解决方法 要使用.net版本3.5,要使用XML数据,最好是用户 LINQ to XML.

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

要么

Manipulate XML data with XPath and XmlDocument (C#)

要么

文章：How to Append to a Large XML File

我想你需要像这样将节点附加到你的xmldocuemnt

//add to elements collectiondoc.documentElement.AppendChild(node);

你需要做这样的事情

Xmldocument xmlDoc=new Xmldocument();xmlDoc.Load("F:/documents and Settings/administrator/Desktop/Account.xml");XmlElement subroot=xmlDoc.CreateElement("User");//UsernameXmlElement appendedElementUsername=xmlDoc.CreateElement("Username");XmlText xmlTextUsername=xmlDoc.CreateTextNode(txtUsrname.Text.Trim());appendedElementUsername.AppendChild(xmlTextUsername);subroot.AppendChild(appendedElementUsername);xmlDoc.documentElement.AppendChild(subroot);//EmailXmlElement 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");//UsernameXmlElement appendedElementUsername=xmlDoc.CreateElement("Username");XmlText xmlTextUsername=xmlDoc.CreateTextNode(txtUsrname.Text.Trim());appendedElementUsername.AppendChild(xmlTextUsername);subroot.AppendChild(appendedElementUsername);xmlDoc.documentElement.AppendChild(subroot);//EmailXmlElement 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");

结果就是这样：

</USERS><User><Username>BUGgaya</Username> <Email>BUGgaya@gmail.com</Email> </User></USERS>

orignal post：Append in xml document

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