- XmlDocument xmlDoc = new XmlDocument();
- xmlDoc.Load("bookstore.xml");
-
- XmlNode root = xmlDoc.SelectSingleNode("bookstore");
- XmlElement xe1 = xmlDoc.CreateElement("book");
- xe1.SetAttribute("genre", "李赞红");
- xe1.SetAttribute("ISBN", "2-3631-4");
-
- XmlElement xesub1 = xmlDoc.CreateElement("title");
- xesub1.InnerText = "CS从入门到精通";
- xe1.AppendChild(xesub1);
- XmlElement xesub2 = xmlDoc.CreateElement("author");
- xesub2.InnerText = "候捷";
- xe1.AppendChild(xesub2);
-
- XmlElement xesub3 = xmlDoc.CreateElement("price");
- xesub3.InnerText = "58.3";
- xe1.AppendChild(xesub3);
-
- root.AppendChild(xe1);
- xmlDoc.Save("bookstore.xml");
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load("bookstore.xml");
//xmlDoc.LoadXml("
");
XmlNode root = xmlDoc.SelectSingleNode("bookstore");//查找
XmlElement xe1 = xmlDoc.CreateElement("book");//创建一个
节点
xe1.SetAttribute("genre", "李赞红");//设置该节点genre属性
xe1.SetAttribute("ISBN", "2-3631-4");//设置该节点ISBN属性
XmlElement xesub1 = xmlDoc.CreateElement("title");
xesub1.InnerText = "CS从入门到精通";//设置文本节点
xe1.AppendChild(xesub1);//添加到
节点中
XmlElement xesub2 = xmlDoc.CreateElement("author");
xesub2.InnerText = "候捷";
xe1.AppendChild(xesub2);
XmlElement xesub3 = xmlDoc.CreateElement("price");
xesub3.InnerText = "58.3";
xe1.AppendChild(xesub3);
root.AppendChild(xe1);//添加到
节点中
xmlDoc.Save("bookstore.xml");
已知有一个XML文件(bookstore.xml)如下:
<?xml version="1.0" encoding="gb2312"?>
<bookstore>
<book genre="fantasy" ISBN="2-3631-4">
<title>Oberon's Legacy</title>
<author>Corets, Eva</author>
<price>5.95</price>
</book>
</bookstore>
1、往<bookstore>节点中插入一个<book>节点:
- XmlDocument xmlDoc = new XmlDocument();
- xmlDoc.Load("bookstore.xml");
-
- XmlNode root = xmlDoc.SelectSingleNode("bookstore");
- XmlElement xe1 = xmlDoc.CreateElement("book");
- xe1.SetAttribute("genre", "李赞红");
- xe1.SetAttribute("ISBN", "2-3631-4");
-
- XmlElement xesub1 = xmlDoc.CreateElement("title");
- xesub1.InnerText = "CS从入门到精通";
- xe1.AppendChild(xesub1);
- XmlElement xesub2 = xmlDoc.CreateElement("author");
- xesub2.InnerText = "候捷";
- xe1.AppendChild(xesub2);
- XmlElement xesub3 = xmlDoc.CreateElement("price");
- xesub3.InnerText = "58.3";
- xe1.AppendChild(xesub3);
-
- root.AppendChild(xe1);
- xmlDoc.Save("bookstore.xml");
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load("bookstore.xml");
//xmlDoc.LoadXml("
");
XmlNode root = xmlDoc.SelectSingleNode("bookstore");//查找
XmlElement xe1 = xmlDoc.CreateElement("book");//创建一个
节点
xe1.SetAttribute("genre", "李赞红");//设置该节点genre属性
xe1.SetAttribute("ISBN", "2-3631-4");//设置该节点ISBN属性
XmlElement xesub1 = xmlDoc.CreateElement("title");
xesub1.InnerText = "CS从入门到精通";//设置文本节点
xe1.AppendChild(xesub1);//添加到
节点中
XmlElement xesub2 = xmlDoc.CreateElement("author");
xesub2.InnerText = "候捷";
xe1.AppendChild(xesub2);
XmlElement xesub3 = xmlDoc.CreateElement("price");
xesub3.InnerText = "58.3";
xe1.AppendChild(xesub3);
root.AppendChild(xe1);//添加到
节点中
xmlDoc.Save("bookstore.xml");
//===============================================
结果为:
<?xml version="1.0" encoding="gb2312"?>
<bookstore>
<book genre="fantasy" ISBN="2-3631-4">
<title>Oberon's Legacy</title>
<author>Corets, Eva</author>
<price>5.95</price>
</book>
<book genre="李赞红" ISBN="2-3631-4">
<title>CS从入门到精通</title>
<author>候捷</author>
<price>58.3</price>
</book>
</bookstore>
2、修改节点:将genre属性值为“李赞红“的节点的genre值改为“update李赞红”,将该节点的子节点<author>的文本修改为“亚胜”。
- XmlNodeList nodeList = xmlDoc.SelectSingleNode("bookstore").ChildNodes;
- foreach (XmlNode xn in nodeList)
- {
- XmlElement xe = (XmlElement)xn;
- if (xe.GetAttribute("genre") == "李赞红")
- {
- xe.SetAttribute("genre", "update李赞红");
-
- XmlNodeList nls = xe.ChildNodes;
- foreach (XmlNode xn1 in nls)
- {
- XmlElement xe2 = (XmlElement)xn1;
- if (xe2.Name == "author")
- {
- xe2.InnerText = "亚胜";
- break;
- }
- }
- break;
- }
- }
-
- xmlDoc.Save("bookstore.xml");
XmlNodeList nodeList = xmlDoc.SelectSingleNode("bookstore").ChildNodes;//获取bookstore节点的所有子节点
foreach (XmlNode xn in nodeList)//遍历所有子节点
{
XmlElement xe = (XmlElement)xn;//将子节点类型转换为XmlElement类型
if (xe.GetAttribute("genre") == "李赞红")//如果genre属性值为“李赞红”
{
xe.SetAttribute("genre", "update李赞红");//则修改该属性为“update李赞红”
XmlNodeList nls = xe.ChildNodes;//继续获取xe子节点的所有子节点
foreach (XmlNode xn1 in nls)//遍历
{
XmlElement xe2 = (XmlElement)xn1;//转换类型
if (xe2.Name == "author")//如果找到
{
xe2.InnerText = "亚胜";//则修改
break;//找到退出来就可以了
}
}
break;
}
}
xmlDoc.Save("bookstore.xml");//保存。
//==================================================
最后结果为:
<?xml version="1.0" encoding="gb2312"?>
<bookstore>
<book genre="fantasy" ISBN="2-3631-4">
<title>Oberon's Legacy</title>
<author>Corets, Eva</author>
<price>5.95</price>
</book>
<book genre="update李赞红" ISBN="2-3631-4">
<title>CS从入门到精通</title>
<author>亚胜</author>
<price>58.3</price>
</book>
</bookstore>
3、删除 <book genre="fantasy" ISBN="2-3631-4">节点的genre属性,删除 <book genre="update李赞红" ISBN="2-3631-4">节点。
- XmlNodeList xnl = xmlDoc.SelectSingleNode("bookstore").ChildNodes;
-
- foreach (XmlNode xn in xnl)
- {
- XmlElement xe = (XmlElement)xn;
- if (xe.GetAttribute("genre") == "fantasy")
- {
- xe.RemoveAttribute("genre");
- }
- else if (xe.GetAttribute("genre") == "update李赞红")
- {
- xe.RemoveAll();
- }
- }
- xmlDoc.Save("bookstore.xml");
XmlNodeList xnl = xmlDoc.SelectSingleNode("bookstore").ChildNodes;
foreach (XmlNode xn in xnl)
{
XmlElement xe = (XmlElement)xn;
if (xe.GetAttribute("genre") == "fantasy")
{
xe.RemoveAttribute("genre");//删除genre属性
}
else if (xe.GetAttribute("genre") == "update李赞红")
{
xe.RemoveAll();//删除该节点的全部内容
}
}
xmlDoc.Save("bookstore.xml");
//===========================================
最后结果为:
<?xml version="1.0" encoding="gb2312"?>
<bookstore>
<book ISBN="2-3631-4">
<title>Oberon's Legacy</title>
<author>Corets, Eva</author>
<price>5.95</price>
</book>
<book>
</book>
</bookstore>
4、显示所有数据。
- XmlNode xn = xmlDoc.SelectSingleNode("bookstore");
-
- XmlNodeList xnl = xn.ChildNodes;
-
- foreach (XmlNode xnf in xnl)
- {
- XmlElement xe = (XmlElement)xnf;
- Console.WriteLine(xe.GetAttribute("genre"));
- Console.WriteLine(xe.GetAttribute("ISBN"));
-
- XmlNodeList xnf1 = xe.ChildNodes;
- foreach (XmlNode xn2 in xnf1)
- {
- Console.WriteLine(xn2.InnerText);
- }
- }