关于XmlWriter写入字符串而不是文件和xmltextwriter的问题就给大家分享到这里，感谢你花时间阅读本站内容，更多关于.net–XMLWritervsXMLDictionaryWriter
关于XmlWriter写入字符串而不是文件和xmltextwriter的问题就给大家分享到这里，感谢你花时间阅读本站内容，更多关于.net – XMLWriter vs XMLDictionaryWriter、c# – 使用xmlwriter附加xml文件、c# – 使用XmlWriter附加现有XML文件、c# – 如何使用CR生成XML,而不是XmlTextWriter中的CRLF等相关知识的信息别忘了在本站进行查找喔。
本文目录一览：- XmlWriter写入字符串而不是文件（xmltextwriter）
- .net – XMLWriter vs XMLDictionaryWriter
- c# – 使用xmlwriter附加xml文件
- c# – 使用XmlWriter附加现有XML文件
- c# – 如何使用CR生成XML,而不是XmlTextWriter中的CRLF
XmlWriter写入字符串而不是文件（xmltextwriter）
我有一个WCF服务，需要返回XML字符串。但是似乎作者只想建立一个文件，而不是一个字符串。我试过了：
string nextXMLstring = "";using (XmlWriter writer = XmlWriter.Create(nextXMLstring))这将产生一个错误，指出nextXMLstring没有文件路径。它想要类似：
using (XmlWriter writer = XmlWriter.Create("nextXMLstring.xml"))如何建立XML，然后将其作为字符串返回？
谢谢！！
答案1
小编典典您需要创建一个StringWriter，并将其传递给XmlWriter。
XmlWriter.Create的字符串重载用于文件名。
例如
using (var sw = new StringWriter()) { using (var xw = XmlWriter.Create(sw)) { // Build Xml with xw. } return sw.ToString();}
.net – XMLWriter vs XMLDictionaryWriter
我正在黑暗中采取一种刺激,您希望使用DataContractSerializer或通常使用de / serialization. XmlDictionaryWriter是WCF使用它进行de / serialization的基类.
从那里我将推断,在XmlDictionaryWriter中必须有一些性能调优,以使其在WCF de / serialization任务中更具性能.事实上,如果你调用WriteObject(Stream,object)而不是WriteObject(XmlWriter,object)或WriteObject(XmlDictionaryWriter,object)方法,它将为你创建一个XmlDictionaryWriter
public virtual void WriteObject(Stream stream,object graph)
{
CheckNull(stream,"stream");
XmlDictionaryWriter writer = XmlDictionaryWriter.CreateTextWriter(stream,Encoding.UTF8,false);
this.WriteObject(writer,graph);
writer.Flush();
}
c# – 使用xmlwriter附加xml文件
//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
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 collection doc.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");
//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");
结果就是这样：
</USERS> <User> <UserName>Buggaya</UserName> <Email>Buggaya@gmail.com</Email> </User> </USERS>
orignal post：Append in xml document
c# – 使用XmlWriter附加现有XML文件
XmlWriterSettings xmlWriterSettings = new XmlWriterSettings();
xmlWriterSettings.Indent = true;
xmlWriterSettings.NewLineOnAttributes = true;
using (XmlWriter xmlWriter = XmlWriter.Create("Test.xml",xmlWriterSettings))
{
xmlWriter.WriteStartDocument();
xmlWriter.WriteStartElement("School");
xmlWriter.WriteEndElement();
xmlWriter.WriteEndDocument();
xmlWriter.Close();
}
我需要动态插入节点,创建以下结构：
<?xml version="1.0" encoding="utf-8"?>
<School />
<Student>
<FirstName>David</FirstName>
<LastName>Smith</LastName>
</Student>
...
<Teacher>
<FirstName>David</FirstName>
<LastName>Smith</LastName>
</Teacher>
...
</School>
我该怎么做？应从键盘读取“FirstName”和“LastName”的值,并且可以随时输入值,当然在现有值下.
解决方法
XDocument doc = XDocument.Load(xmlFilePath);
XElement school = doc.Element("School");
school.Add(new XElement("Student",new XElement("FirstName","David"),new XElement("LastName","Smith")));
doc.Save(xmlFilePath);
编辑
如果要将Element添加到Existing< Student>,只需添加一个Attribute
school.add(new XElement("Student",new XAttribute("ID","ID_Value"),"Smith")));
然后,您可以向现有< Student>添加更多详细信息.通过搜索 – >得到 – >加
XElement particularStudent = doc.Element("School").Elements("Student")
.Where(student => student.Attribute("ID").Value == "SearchID")
.FirstOrDefault();
if(particularStudent != null)
particularStudent.Add(new XElement("<NEwElementName>","<Value>");
c# – 如何使用CR生成XML,而不是XmlTextWriter中的CRLF
该文件看起来很好,验证(at wc3),并被客户接受.
但客户端供应商抱怨线路终端是CRLF,而不仅仅是CR.
好吧,我在使用C#的Win32机器上,而CRLF是Win32标准的行结束.
有没有办法改变XmlTextWriter中的行结尾？
另外 – 对于正确的XML解析器,行结尾不应该无关紧要吗？
另见：What are carriage return,linefeed,and form feed?
注意：看起来唯一的答案是横向解决方案 – 您必须使用XmlWriter而不是XmlTextWriter
解决方法
然后在SO: Writing XMLDocument to file with specific newline character (c#)引导我接受了不可接受的答案
一切都在术语…..
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