form1.cs

实现C/S 国家 省市 级联实现C/S 国家 省市 级联

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Collections;
namespace 国省市下拉条
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

       Hashtable hashtable = new Hashtable();
        private void Form1_Load(object sender, EventArgs e)
        {
            String str = "2008-01-11 11:42:49.267";
            String []str1 = str.Split(new Char[] { ' ', '-',' ','-',' ',' ',' ',':',' ',':',' ','.',' '});
            MessageBox.Show(str1[0]+str1[1]+str1[2]+str1[3]+str1[4]);
            Add add = new Add();
            hashtable = add.Addhashtable();
            FillcomboBox();
        }
        //添加国家
       private void FillcomboBox()
       {
          
          String[] ww=GetItems(hashtable["0"].ToString());
           for (int i = 0; i <ww.Length ;i++ )
           {
               this.comboBox1.Items.Add (ww[i].ToString());
           }
           
       }
       //获取详细字段
        private String[] GetItems(String aa)
        {
         
            int y=0;
          for(int i=0;i<aa.Length ;i++)
          {
             if(aa[i].Equals(","))
             {
               y++;
             }
          }
          String[] item=new string[y+1];
          item=aa.Split(',');
          return item;
        }
        //添加省
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            //this.comboBox2.Text = "";
            //this.comboBox3.Text = "";
            //this.comboBox2.Items.Clear();
            int a=this.comboBox1.SelectedIndex;
            int b = this.comboBox1.SelectedIndex;
            int c = this.comboBox2.SelectedIndex;
            String[] ww = GetItems(hashtable["0_"+a].ToString());
            this.comboBox2.Text = ww[0].ToString();
            String[] ss = GetItems(hashtable["0_" + b + "_" + c].ToString());
            this.comboBox3.Text = ww[0].ToString();
            for (int i = 0; i < ww.Length; i++)
            {
                this.comboBox2.Items.Add(ww[i].ToString());
            }
        }


        //添加市 
        private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            //this.comboBox3.Text = "";
            //this.comboBox3.Items.Clear();
            int a = this.comboBox1.SelectedIndex;
            int b = this.comboBox2.SelectedIndex;
            String[] ww = GetItems(hashtable["0_" + a + "_" + b].ToString());
            this.comboBox3.Text = ww[0].ToString();
            for (int i = 0; i < ww.Length; i++)
            {
                this.comboBox3.Items.Add(ww[i].ToString());
            }
        }
    }
}