XML简单的增改删操作
XML文件的简单增改删，每一个都可以单独拿出来使用。
新创建XML文件，<?xmlversion="1.0"encoding="utf-8"?>
<bookstore>
<bookgenre="fantasy"ISBN="2-3631-4">
<title>Oberon's Legacy</title>
<author>Corets, Eva</author>
<price>5.95</price>
</book>
</bookstore>
实现如下：
//插入节点
protected void btn_Add_Click(object sender, EventArgs e)
{
XmlDocument doc = new XmlDocument();
doc.Load(@"E:\ruxiaomeng\Simple\C++\CLR\stlclr\StlClr Sample\XMLTest\bookstore.xml");
XmlNode root = doc.SelectSingleNode("bookstore");//找到根节点
XmlElement new_ele = doc.CreateElement("book");//文档创建节点<book>
new_ele.SetAttribute("genre", "历史");
new_ele.SetAttribute("ISBN", "100-001-*6963");//设置属性
XmlElement new_ele_childone = doc.CreateElement("title");
new_ele_childone.InnerText = "史记"; //填充新节点内的文本。
new_ele.AppendChild(new_ele_childone);//给父节点添加子节点。
XmlElement new_ele_childtwo = doc.CreateElement("author");
new_ele_childtwo.InnerText = "司马迁";
new_ele.AppendChild(new_ele_childtwo);
XmlElement new_ele_childthree = doc.CreateElement("price");
new_ele_childthree.InnerText = "90.36";
new_ele.AppendChild(new_ele_childthree);
root.AppendChild(new_ele);//根节点添加新创建的子节点！
doc.Save(@"E:\ruxiaomeng\Simple\C++\CLR\stlclr\StlClr Sample\XMLTest\bookstore.xml");//记得一定要保存！
}
//更新属性和节点值
protected void btn_Edit_Click(object sender, EventArgs e)
{
XmlDocument doc = new XmlDocument();
doc.Load(@"E:\ruxiaomeng\Simple\C++\CLR\stlclr\StlClr Sample\XMLTest\bookstore.xml");
XmlNodeList nodes = doc.SelectSingleNode("bookstore").ChildNodes; //找到根节点下的所有子节点。
foreach (XmlElement item in nodes)
{
if (item.GetAttribute("genre") == "历史")//找属性
{
item.SetAttribute("genre", "中国古代史");
}
XmlNodeList childsnodes = item.ChildNodes;
foreach (XmlElement childitem in childsnodes)
{
if (childitem.Name == "price") //找节点
{
childitem.InnerText = "199";
break;
}
}
}
doc.Save(@"E:\ruxiaomeng\Simple\C++\CLR\stlclr\StlClr Sample\XMLTest\bookstore.xml");
}
//删除节点的genre属性，删除price是99的节点
protected void btn_Del_Click(object sender, EventArgs e)
{
XmlDocument doc = new XmlDocument();
doc.Load(@"E:\ruxiaomeng\Simple\C++\CLR\stlclr\StlClr Sample\XMLTest\bookstore.xml");
XmlNode root = doc.SelectSingleNode("bookstore");
foreach (XmlElement item in root.ChildNodes)
{
if (item.HasAttribute("genre"))
{
item.RemoveAttribute("genre");
}
foreach (XmlElement child_item in item)
{
if (child_item.Name == "price" && child_item.InnerText == "99")
{
root.RemoveChild(item);
}
}
}
doc.Save(@"E:\ruxiaomeng\Simple\C++\CLR\stlclr\StlClr Sample\XMLTest\bookstore.xml");
}
