Extensible Markup Language XML

XML Overview:

: Extensible Markup Language

: XML is used to describe data

: XML is called Extensible Markup Language, which is used primarily to describe data

: XML nodes are case-sensitive, paired, and can be freely extended

Methods of manipulating XML (i)

1. Instantiate Document Object XMLDocument myXML =new XMLDocument (), parsing XML file class

2, Myxml.load ("Engineer.xml"); load the specified XML data

3, XmlNode engineer = myxml.documentelement; get root node

4, foreach (XmlNode node in engineer. ChildNodes) gets all the child nodes of the current node

{

Switch (node. Name) Current node name

{

Case "Name":

Console.WriteLine ("Name: {0}", node.) InnerText); The value of the current node

Break

Top down, row by line parsing

}

}

　　　　　　　　

Ways to manipulate XML (ii)

: Traversing a child node under a child node through a double foreach loop

　　　　　　　　

　　　　　　　　　　　　: Direct output through the name of the child node

　　　　　　TreeView Display Data (i)

TreeView Dynamic Add Node

　　　　　　

　　　　　　　　　　Tree Menu Expansion Method: Control name. ExpandAll ();

To delete a node:

this. The name of the control. Selectednode.remove ();

To empty a node:

this. The name of the control. SelectedNode.Nodes.Clear ();//empties all child nodes under the node

this. The name of the control. Node.clear ();//empties all nodes in the TreeView control

The method of emptying the tree menu is often used to update the top of the tree menu method so that the node is not loaded repeatedly

Summarize:

TreeView is used to display information with hierarchies

The TreeView main attributes are nodes and SelectedNode

TreeNode the Node object that represents the TreeView

The Text property is used to set the text description of the node

The Tag property can set node-related information

　　　　　　

　　　　　　　　　　　　　

Extensible Markup Language XML