C# 操作XML
－、XMLTextWriter用法
代码
using
(System.IO.MemoryStream stream
=
new
System.IO.MemoryStream())
{
//
System.Xml.XmlTextWriter writer = new System.Xml.XmlTextWriter(stream, null);
System.Xml.XmlTextWriter writer
=
new
System.Xml.XmlTextWriter(Server.MapPath(
"
userInfo.xml
"
), System.Text.Encoding.UTF8);
writer.Formatting
=
System.Xml.Formatting.Indented;
writer.WriteStartDocument(
true
);
writer.WriteStartElement(
"
PP
"
);
writer.WriteStartElement(
"
X
"
);
writer.WriteString(
"
1
"
);
writer.WriteEndElement();
writer.WriteStartElement(
"
Y
"
);
writer.WriteString(
"
1
"
);
writer.WriteEndElement();
writer.WriteStartElement(
"
Name
"
);
writer.WriteString(
"
fan
"
);
writer.WriteEndElement();
writer.WriteEndElement();
writer.Flush();
writer.Close();
}
二、XMLDocument用法
代码
XmlDocument xmldoc;
XmlNode xmlnode;
xmldoc
=
new
XmlDocument();
xmlnode
=
xmldoc.CreateNode(XmlNodeType.XmlDeclaration,
""
,
""
);
xmldoc.AppendChild(xmlnode);
//
加入XML的声明段落,<?xml version="1.0" encoding="utf-8"?>
//
xmlnode = xmldoc.CreateXmlDeclaration("1.0", "utf-8", null);
//
xmldoc.AppendChild(xmlnode);
//
加入一个根元素
xmldoc.AppendChild(xmldoc.CreateElement(
""
,
"
Menu
"
,
""
));
foreach
(ComponentArt.Web.UI.MenuItem mi
in
Menu2.Items)
{
if
(mi.Enabled
&&
mi.Visible)
{
XmlElement xmlelem;
xmlelem
=
xmldoc.CreateElement(
"
Item
"
);
xmlelem.SetAttribute(
"
title
"
,
string
.Format(
"
{0}
"
, mi.Text));
if
(
string
.IsNullOrEmpty(mi.NavigateUrl))
xmlelem.SetAttribute(
"
url
"
,
string
.Format(
"
{0}
"
, mi.Items[
0
].NavigateUrl));
else
xmlelem.SetAttribute(
"
url
"
,
string
.Format(
"
{0}
"
, mi.NavigateUrl));
xmldoc.ChildNodes.Item(
1
).AppendChild(xmlelem);
}
}
xmldoc.Save(Request.PhysicalApplicationPath
+
@"
data.xml
"
);
string
xmlContent
=
xmldoc.OuterXml;
另外读取的话，用XMLTextReader很方式，也是只进读取，性能据说比较ＯＫ!
三、XMLTextReader用法
代码
string
targer;
XmlDocument xmldoc
=
new
XmlDocument();
xmldoc.Load(
"
userInfo.xml
"
);
byte
[] bytes
=
System.Text.UTF8Encoding.UTF8.GetBytes(xmldoc.OuterXml);
using
(System.IO.MemoryStream stream
=
new
System.IO.MemoryStream(bytes))
{
using
(XmlTextReader reader
=
new
XmlTextReader(stream))
{
while
(reader.Read())
{
if
(
!
reader.IsEmptyElement
&&
reader.NodeType
==
XmlNodeType.Element)
{
switch
(reader.LocalName)
{
case
"
X
"
:
targer
=
reader.ReadString();
break
;
}
}
}
}
}
另外，XML的一个应用是序列化，要用到把字符串转化成byte数组，方法：
byte[] bytes = System.Text.UTF8Encoding.UTF8.GetBytes(XmlContent);
相对的，把byte数组转化为字符串的方法则为：
string XmlContent = System.Text.UTFEncoding.UTF8.GetString(bytes);
这样方便了吧，把想存的东东转化为byte数组，然后压缩一下，网络传输的话也应该很ＯＫ了吧