Xml文档增删改查
private void btnCreate_Click(object sender, EventArgs e)
{
XmlDocument xmlDoc = new XmlDocument();
//建立Xml的定义声明
XmlDeclaration dec = xmlDoc.CreateXmlDeclaration("1.0", "GB2312", null);
xmlDoc.AppendChild(dec);
//创建根节点
XmlElement root = xmlDoc.CreateElement("Books");
xmlDoc.AppendChild(root);
//创建根节点的子节点Book
XmlNode book = xmlDoc.CreateElement("Book");
//创建Book的子节点
XmlElement title = xmlDoc.CreateElement("Title");
title.InnerText = "SQLServer";
book.AppendChild(title);
XmlElement isbn = xmlDoc.CreateElement("ISBN");
isbn.InnerText = "444444";
book.AppendChild(isbn);
XmlElement author = xmlDoc.CreateElement("Author");
author.InnerText = "jia";
book.AppendChild(author);
XmlElement price = xmlDoc.CreateElement("Price");
price.InnerText = "120";
price.SetAttribute("Unit", "-FCKpd-0quot");
book.AppendChild(price);
//将Book添加到根节点上
root.AppendChild(book);
//保存文档（如果已经存在该文件，则更新之；如果没有，则创建该文件）
xmlDoc.Save(@"F:/my files/project/产品说明/系统流程图/我的文档/讨论/Books.xml");
}
//插入新的节点
private void btnInsert_Click(object sender, EventArgs e)
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(@"F:/my files/project/产品说明/系统流程图/我的文档/讨论/Books.xml");
XmlNode root = xmlDoc.SelectSingleNode("Books");
XmlElement book = xmlDoc.CreateElement("Book");
book.SetAttribute("face", "red");
XmlElement title = xmlDoc.CreateElement("Title");
title.InnerText = "XML";
book.AppendChild(title);
XmlElement isbn = xmlDoc.CreateElement("ISBN");
isbn.InnerText = "555555";
book.AppendChild(isbn);
XmlElement author = xmlDoc.CreateElement("Author");
author.InnerText = "fengyafei";
book.AppendChild(author);
XmlElement price = xmlDoc.CreateElement("Price");
price.InnerText = "100";
price.SetAttribute("Unit", "-FCKpd-0quot");
book.AppendChild(price);
root.AppendChild(book);
xmlDoc.Save(@"F:/my files/project/产品说明/系统流程图/我的文档/讨论/Books2.xml");
}
//更改节点、元素和属性
private void btnUpdate_Click(object sender, EventArgs e)
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(@"F:/my files/project/产品说明/系统流程图/我的文档/讨论/Books.xml");
//获取Books节点的所有子节点
XmlNodeList list = xmlDoc.SelectSingleNode("Books//Book").ChildNodes;
//遍历所有子节点
foreach (XmlNode node in list)
{
//将子节点类型转换为XmlElement类型
XmlElement xe = (XmlElement)node;
if (xe.Name == "Author")
{
xe.InnerText = "along";
}
if (xe.GetAttribute("Unit") == "-FCKpd-0quot")
{
xe.SetAttribute("Unit", "$");
}
}
//保存
xmlDoc.Save(@"F:/my files/project/产品说明/系统流程图/我的文档/讨论/Books3.xml");
}
//删除节点、元素或属性
private void btnDelete_Click(object sender, EventArgs e)
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(@"F:/my files/project/产品说明/系统流程图/我的文档/讨论/Books.xml");
//获取Books节点的所有子节点
XmlNodeList list = xmlDoc.SelectSingleNode("Books//Book").ChildNodes;
//遍历所有子节点
foreach (XmlNode node in list)
{
//将子节点类型转换为XmlElement类型
XmlElement xe = (XmlElement)node;
if (xe.Name == "Author")
{
xe.RemoveAll();
}
if (xe.GetAttribute("Unit") == "-FCKpd-0quot")
{
xe.RemoveAttribute("Unit");
break;//删除后直接退出来
}
}
//保存
xmlDoc.Save(@"F:/my files/project/产品说明/系统流程图/我的文档/讨论/Books4.xml");
}
//用XmlTextReader读取XML文档
private void btnRead_Click(object sender, EventArgs e)
{
string fileName = @"F:/my files/project/产品说明/系统流程图/我的文档/讨论/Books.xml";
XmlTextReader reader = new XmlTextReader(fileName);
string str = string.Empty;
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
if (reader.LocalName.Equals("Title") || reader.LocalName.Equals("Author"))
{
str += reader.ReadString() + " ";
}
}
}
MessageBox.Show(str);
}
//用XmlTextWriter写入（不是插入，写入会覆盖文档中已有的所有节点）节点
private void btnWrite_Click(object sender, EventArgs e)
{
string fileName = @"F:/my files/project/产品说明/系统流程图/我的文档/讨论/Books.xml";
XmlTextWriter writer = new XmlTextWriter(fileName, null);
writer.Formatting = Formatting.Indented;
writer.Indentation = 6;
writer.WriteStartDocument();
writer.WriteStartElement("Books");
writer.WriteStartElement("Book");
writer.WriteElementString("Title", "Window Form");
writer.WriteElementString("ISBN", "111111");
writer.WriteElementString("Author", "amandag");
writer.WriteStartElement("Price");
writer.WriteAttributeString("Unit", "￥");
writer.WriteValue("128.00");
writer.WriteEndElement();
writer.WriteEndElement();
writer.WriteStartElement("Book");
writer.WriteElementString("Title", "ASP.NET");
writer.WriteElementString("ISBN", "222222");
writer.WriteElementString("Author", "moon");
writer.WriteStartElement("Price");
writer.WriteAttributeString("Unit", "___FCKpd___0quot");
writer.WriteValue("111.00");
writer.WriteEndElement();
writer.WriteEndElement();
writer.WriteEndElement();
writer.WriteEndDocument();
writer.Close();
}
}
}