using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Xml; using System.IO; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } List<string> sheng = new List<string>(); List<string> shi = new List<string>(); List<string> qua = new List<string>(); private void Form1_Load(object sender, EventArgs e) { XmlDocument doc = new XmlDocument(); doc.Load("Provinces.xml"); comboBox1.Items.Clear(); sheng.Clear(); XmlNodeList nodelist = doc.SelectNodes("/Provinces/Province"); foreach (XmlNode item in nodelist) { comboBox1.Items.Add(item.Attributes["ProvinceName"].Value); sheng.Add(item.Attributes["ID"].Value); } comboBox1.SelectedIndex = 0; } private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { XmlDocument xm = new XmlDocument(); xm.Load("Cities.xml"); shi.Clear(); comboBox2.Items.Clear(); string cid = sheng[comboBox1.SelectedIndex]; XmlNodeList citys = xm.SelectNodes("/Cities/City[@PID="+cid+"]"); foreach (XmlNode item in citys) { comboBox2.Items.Add(item.Attributes["CityName"].Value); shi.Add(item.Attributes["ID"].Value); } comboBox2.SelectedIndex = 0; } private void comboBox3_SelectedIndexChanged(object sender, EventArgs e) { } private void comboBox2_SelectedIndexChanged(object sender, EventArgs e) { XmlDocument qu = new XmlDocument(); qu.Load("Districts.xml"); qua.Clear(); comboBox3.Items.Clear(); string qid = shi[comboBox2.SelectedIndex]; XmlNodeList qux = qu.SelectNodes("/Districts/District[@CID=" + qid + "]"); foreach (XmlNode item in qux) { comboBox3.Items.Add(item.Attributes["DistrictName"].Value); qua.Add(item.Attributes["ID"].Value); } comboBox3.SelectedIndex = 0; } } }
时间: 2024-11-10 11:54:01