C# xml文件读取
假设有xml文件：ParamConfig.xml
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<books kinds="7">
<book name="math" price="20"></book>
<book name="Chinese" price="10"></book>
<book name="English" price="15"></book>
<book name="chemistry" price="25"></book>
<book name="biology" price="20"></book>
<book name="physics" price="30"></book>
<book name="history" price="15"></book>
</books>
</configuration>
//文件路径
string filePath = System.AppDomain.CurrentDomain.BaseDirectory + @"\ParamConfig.xml";
/// <summary>
/// 加载xml
/// </summary>
private void LoadXML()
{
string filePath = System.AppDomain.CurrentDomain.BaseDirectory + @"\ParamConfig.xml";
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(filePath);
XmlNode parent, root;
parent = xmlDoc.SelectSingleNode("configuration");
if (null == parent)
{
return;
}
root = parent.SelectSingleNode("books");
if (null == root)
{
return;
}
XmlNodeList nodeList = root.ChildNodes;
if (null == nodeList || nodeList.Count <= 0)
{
return;
}
foreach (XmlNode node in nodeList)
{
XmlElement element = node as XmlElement;
this.richTextBox1.AppendText(string.Format("name={0},price={1}", element.GetAttribute("name"),
element.GetAttribute("price")) + "\r\n");
}
}
/// <summary>
/// 保存xml
/// </summary>
private void SaveXML()
{
List<book> bookList = new List<book>();
bookList.Add(new book("math", "25"));
bookList.Add(new book("Chinese", "5"));
bookList.Add(new book("Biology", "10"));
XmlDocument xmlDoc = new XmlDocument();
if (!System.IO.File.Exists(filePath))
{
XmlDeclaration dec = xmlDoc.CreateXmlDeclaration("1.0", "utf-8", string.Empty);
xmlDoc.AppendChild(dec);
}
else
{
xmlDoc.Load(filePath);
}
XmlNode parent, root;
parent = xmlDoc.SelectSingleNode("configuration");
if (null == parent)
{
parent = xmlDoc.CreateElement("configuration");
xmlDoc.AppendChild(parent);
}
root = parent.SelectSingleNode("books");
if (null == root)
{
root = xmlDoc.CreateElement("books");
parent.AppendChild(root);
}
root.RemoveAll();
((XmlElement)root).SetAttribute("kinds", bookList.Count.ToString());
foreach (book pbook in bookList)
{
XmlElement bookElement = xmlDoc.CreateElement("book");
bookElement.SetAttribute("name", pbook.name);
bookElement.SetAttribute("price", pbook.price);
root.AppendChild(bookElement);
}
xmlDoc.Save(filePath);
}
private void btnSave_Click(object sender, EventArgs e)
{
SaveXML();
}
private void btnLoad_Click(object sender, EventArgs e)
{
LoadXML();
}
