如何从列表框中的节点读取值 [英] How to read values from a node which is in list box
本文介绍了如何从列表框中的节点读取值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
ListBox listBox1 = new ListBox();
string fileName = (Server.MapPath("OrgList.xml"));
XPathDocument doc = new XPathDocument(fileName);
XPathNavigator nav = doc.CreateNavigator();
// Compile a standard XPath expression
XPathExpression expr;
expr = nav.Compile("/main/DATA_RECORD");
XPathNodeIterator iterator = nav.Select(expr);
// Iterate on the node set
listBox1.Items.Clear();
try
{
while (iterator.MoveNext())
{
XPathNavigator nav2 = iterator.Current.Clone();
listBox1.Items.Add(nav2.Value);
}
}
catch (Exception ex)
{
Response.Write(ex.ToString());
}
在程序数据记录中是其中包含3个项(名称,度数和ID)的节点. iteraor与节点一起传递,并循环遍历所有节点以及添加到列表框中的所有节点.现在,我想分别访问这3个项目.
In the program data record is the node which has 3 items(name,degree,and ID) in it. The iteraor gets passed with the node and it loops through all the node and all the nodes added to a list box. Now I want to access the 3 items separately. What is the syntax for it?
推荐答案
简单示例显示直接通过索引和foreach;
Simple Example showing direct via index and foreach;
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
//Add some items to a ListBox on the form
for (int x = 0; x < 5; x++)
{
listBox1.Items.Add("Item " + x.ToString());
}
}
//Access an item by Index in collection
private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show(listBox1.Items[2].ToString());
}
//Iterate the collection
private void button2_Click(object sender, EventArgs e)
{
foreach (String item in listBox1.Items)
{
MessageBox.Show(item);
}
}
}
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