公交线路查询(WinForm)

1.  common.cs

 

using System;
using System.Collections.Generic;
using System.Text;

namespace Friday_A
{
    class common
    {
   
    }

    /// <summary>
    /// 保存数据信息
    /// </summary>
    class BusInfo
    {
        public string strLineName; //车次名称
        public string strLineMemo; //车次备注
        public string strLines;    //行车路线
    }
    /// <summary>
    /// 保存要输出的信息
    /// </summary>
    class nonstopLine
    {
        public string strLineName;
        public string strlineCount; //行车站数
        public string strLines;
    }
    class BusLineName
    {
        /// <summary>
        /// 计算站点在数组中的索引
        /// </summary>
        /// <param name="lines">数组</param>
        /// <param name="value">站点</param>
        /// <returns></returns>
        public static int IndexOfArray(string[] lines, string value)
        {
            for (int i = 0; i < lines.Length;i++ )
            {
                if (lines[i] == value)
                {
                    return i;
                }
         
            }
            return -1;
        }
    }
}

-----------------------------------------------------------------------------------------

2. GetData.cs

 

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.OleDb;
using System.Collections;

namespace Friday_A
{
    class GetData
    {
        public static ArrayList GetLines()
        {
            OleDbConnection conn = new OleDbConnection();
            conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=busline.mdb";
            string sql = "select * from 公交信息表";
            OleDbCommand comm = new OleDbCommand(sql,conn);
            conn.Open();
            OleDbDataReader oddr = comm.ExecuteReader();
            ArrayList al = new ArrayList(); //存储公交信息
            while(oddr.Read())
            {
                BusInfo bi = new BusInfo();
                bi.strLineName = oddr["车次"].ToString();
                bi.strLineMemo = oddr["车次备注"].ToString();
                bi.strLines = oddr["行车路线"].ToString();
                al.Add(bi);
            }
            conn.Close();
            return al;
        }
    }
}

-----------------------------------------------------------------------------------------------

3.  Form1.cs

 

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;
using System.Threading;  //引用线程命名空间

namespace Friday_A
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        ArrayList busLine = new ArrayList(); //存放车次信息
        bool loadComplete = false; //标志线程加载是否结束
        private void Form1_Load(object sender, EventArgs e)
        {
            Thread t = new Thread(new ThreadStart(GetLoadData));//定义一个线程，用来加载数据
            t.Start();//打开线程
          
        }
        private void button1_Click(object sender, EventArgs e)
        {
            string strStart = textBox1.Text;
            string strEnd = textBox2.Text;

            if(strStart.Trim().Length==0)
            {
                MessageBox.Show("哥们儿，从哪上车啊？","乘务员说：",MessageBoxButtons.OK,MessageBoxIcon.Information);
                textBox1.Text = "";
                textBox1.Focus();
                return;
            }
            if (strEnd.Trim().Length == 0)
            {
                MessageBox.Show("哥们儿，从哪下车啊？", "乘务员说：", MessageBoxButtons.OK, MessageBoxIcon.Information);
                textBox2.Text = "";
                textBox2.Focus();
                return;
            }
            if (!loadComplete)
            {
                MessageBox.Show("各位乘客，前方车多人多，车辆行驶缓慢，请谅解！","乘务员说：",MessageBoxButtons.OKCancel,MessageBoxIcon.Information);
                return;
            }

            ArrayList al = NonstopLines(strStart, strEnd);
            if(al.Count>0)
            {
                richTextBox1.Text = "从 " + strStart + " 开往 " + strEnd + "的车辆\n\n";

                myCompare mc = new myCompare(); //排序器实例化
                al.Sort(mc);//使用排序器

                for(int i=0;i<al.Count;i++)
                {
                    nonstopLine nl = (nonstopLine)al[i];
                    richTextBox1.Text=richTextBox1.Text+"车次："+nl.strLineName+"\n";
                    richTextBox1.Text=richTextBox1.Text+"站数："+nl.strlineCount+"\n";
                    richTextBox1.Text=richTextBox1.Text+"线路："+nl.strLines+"\n\n";
                }
            }

        }
        class myCompare:IComparer   //定义一个排序器
        {
            #region IComparer 成员

            public int Compare(object x, object y)
            {
                nonstopLine n1 = (nonstopLine)x;
                nonstopLine n2 = (nonstopLine)y;
                int a = Convert.ToInt16(n1.strlineCount);
                int b = Convert.ToInt16(n2.strlineCount);
                if (a > b)
                {
                    return 1;//a>b 返回1：正序排列；返回-1倒序排列
                }
                else if(a<b)
                {
                    return -1;
                }
                else
                {
                    return 0;
                }
            }

            #endregion
        }
private void GetLoadData()
        {
            busLine = GetData.GetLines();//加载数据
            loadComplete = true;  //加载结束，标志为true
        }
        private ArrayList NonstopLines(string strStart, string strEnd)
        {
            ArrayList al = new ArrayList();
            for (int i = 0; i < busLine.Count;i++ ) //循环查找每辆直达车
            {
                BusInfo c = (BusInfo)busLine[i]; //将数组重新定义
                string[] arrLines = c.strLines.Split("-".ToCharArray());//将行车路线拆分，放进数组
                int iUpLine = BusLineName.IndexOfArray(arrLines,strStart); //公交车上下行判断
                int iDownLine = BusLineName.IndexOfArray(arrLines, strEnd);
                if (iUpLine >= 0 && iDownLine >= 0)
                {
                    nonstopLine nl = new nonstopLine(); //实例化nonstopLine类
                    nl.strLineName = c.strLineName; //将从数据库读出的车次信息赋给要输出的车次信息
                    nl.strlineCount = Convert.ToString(Math.Abs(iUpLine-iDownLine));//计算行车站数
                    string strLines = ""; //定义一个字符串变量，用来保存行车路线站点
                    if (iUpLine > iDownLine)
                    {
                        for (int j = iUpLine; j >= iDownLine; j--)
                        {
                            strLines += arrLines[j] + "-";
                        }
                    }
                    else
                    {
                        for (int j = iUpLine; j <= iDownLine;j++ )
                        {
                            strLines += arrLines[j] + "-";
                        }
                    }
                    strLines = strLines.Substring(0, strLines.Length - 1); //去掉字符串最后面的"-"
                    nl.strLines = strLines;
                    al.Add(nl);
                }
              
            }
            return al;
        }
    }
}