大神们看一下我这代码怎么改

Question

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.IO;namespace LMZshipin
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        string[] fileList = new string[10000];       // 定义播放列表数的最大值
        int numOfMusic;                              // 选中的媒体文件的索引号
        int selectOne;                                // 选中的音乐文件
        bool playOne = false;                        // 控制是否循环播放
        public void AddFile(string path)
        {
            if (numOfMusic < 10000)
            {
                numOfMusic += 1;
                fileList[numOfMusic] = path;
            }
            else
            {
                MessageBox.Show("不能添加文件!", "播放列表已满");
            }
        }        public void AddFiles(string path, ListBox lstFiles)
        {
            DirectoryInfo dir = new DirectoryInfo(path);
            foreach (FileInfo f in dir.GetFiles("*.mp3"))
            {
                AddFile(f.FullName);
                int i;
                string strFile = Convert.ToString(numOfMusic);
                for (i = 1; i <= 5 - strFile.Length; i++)
                {
                    strFile += "";
                }
                strFile = f.Name;
                lstFileList.Items.Add(strFile);
            }
            foreach (DirectoryInfo d in dir.GetDirectories())
            {
                AddFiles(d.FullName, lstFileList);
            }
        }        public void DelFile(int selectNum)
        {
            int i;
            for (i = selectNum; i <= numOfMusic - 1; i++)
            {
                fileList[i] = fileList[i + 1];
            }
            numOfMusic -= 1;
        }        public void CloseBtn()
        {
            btnPlay.Enabled = false;
            btnBack.Enabled = false;
            btnForward.Enabled = false;
            btnStop.Enabled = false;
            btnReplay.Enabled = false;
            btnDelete.Enabled = false;
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            lstFileList.Items.CopyTo(fileList, 0);
            // 将列表框（lstFileList）中的列表项全部复制到数组（fileList）中
            numOfMusic = 0;          // 选中第一个媒体文件
            CloseBtn();        }
         public void Play(int selectNum)
        {
            mediaPlayer.URL = fileList[selectNum];       // 播放选中的媒体文件
            this.Text = "正在播放 -- " + lstFileList.SelectedItem.ToString();
        }        public void OpenBtn()
        {
            btnPlay.Enabled = true;
            btnBack.Enabled = true;
            btnForward.Enabled = true;
        }
        private void axWindowsMediaPlayer1_Enter(object sender, EventArgs e)
        {        }        private void butAddFile_Click(object sender, EventArgs e)
        {
            int i;
            odlgMedia.FileName = "";                             // 设置默认文件名
            odlgMedia.InitialDirectory = "C:\\";                 // 设置默认路径
            odlgMedia.Filter = "mp3文件|*.mp3|所有文件|*.*";     // 设置文件类型
            if (odlgMedia.ShowDialog() == DialogResult.OK)
            {
                string path = odlgMedia.FileName;
                FileInfo f = new FileInfo(path);
                AddFile(f.FullName);
                string strFile = Convert.ToString(numOfMusic);
                for (i = 1; i <= 5 - strFile.Length; i++)
                {
                    strFile += "";
                }
                strFile = f.Name;
                lstFileList.Items.Add(strFile);
                if (lstFileList.Items.Count > 0)
                {
                    OpenBtn();
                }
            }        }        private void btnAddFiles_Click(object sender, EventArgs e)
        {
            fbdlaMedia.SelectedPath = "c:\\";
            fbdlaMedia.ShowNewFolderButton = true;
           
            fbdlaMedia.Description = "请选择媒体文件目录：";
            fbdlaMedia.ShowNewFolderButton = false;
            if (fbdlaMedia.ShowDialog() == DialogResult.OK)
            {
                AddFiles(fbdlaMedia.SelectedPath, lstFileList);
                if (lstFileList.Items.Count > 0)
                {
                    OpenBtn();
                }
            }        }        private void btnDelete_Click(object sender, EventArgs e)
        {
            int i = lstFileList.SelectedIndex;
            if (lstFileList.SelectedIndex >= 0)
            {
                if ((selectOne == lstFileList.SelectedIndex + 1) && (mediaPlayer.URL != ""))
                {
                    MessageBox.Show("不能删除正在播放的文件", "错误");
                }
                else
                {
                    DelFile(i + 1);
                    lstFileList.Items.RemoveAt(i);
                    if (i < lstFileList.Items.Count)
                    {
                        lstFileList.SelectedIndex = i;
                    }
                    else if (lstFileList.Items.Count == 0)
                    {
                        CloseBtn();
                    }
                    else
                    {
                        lstFileList.SelectedIndex = 0;
                    }
                }
            }        }        private void btnPlay_Click(object sender, EventArgs e)
        {
            if (lstFileList.SelectedIndex < 0)
            {
                selectOne = 1;
                lstFileList.SelectedIndex = 0;
            }
            else
            {
                selectOne = lstFileList.SelectedIndex + 1;
            }
            Play(selectOne);
            tmrMedia.Enabled = true;
            btnStop.Enabled = true;
            btnReplay.Enabled = true;        }        private void lstFileList_SelectedIndexChanged(object sender, EventArgs e)
        {
            
            btnDelete.Enabled = true;
        }        private void btnBack_Click(object sender, EventArgs e)
        {
            if (lstFileList.SelectedIndex > 0)
            {
                lstFileList.SelectedIndex -= 1;
            }
            else if (lstFileList.SelectedIndex == 0)
            {
                lstFileList.SelectedIndex = lstFileList.Items.Count - 1;
            }
            else
            {
                lstFileList.SelectedIndex = numOfMusic - 1;
            }
            selectOne = lstFileList.SelectedIndex + 1;
            Play(selectOne);
            btnStop.Enabled = true;
            btnReplay.Enabled = true;        }        private void btnForward_Click(object sender, EventArgs e)
        {
            if (lstFileList.SelectedIndex < lstFileList.Items.Count - 1)
            {
                lstFileList.SelectedIndex = lstFileList.SelectedIndex + 1;
            }
            else
            {
                if (lstFileList.SelectedIndex > 0)
                {
                    lstFileList.SelectedIndex = 0;
                }
            }
            selectOne = lstFileList.SelectedIndex + 1;
            Play(selectOne);
            btnStop.Enabled = true;
            btnReplay.Enabled = true;
        }        private void btnStop_Click(object sender, EventArgs e)
        {
            mediaPlayer.URL = "";
            this.Text = "媒体播放器";
            tmrMedia.Enabled = false;
            btnReplay.Enabled = false;
            lstFileList.SelectedIndex = selectOne - 1;        }        private void btnReplay_Click(object sender, EventArgs e)
        {
            if (playOne == true)
            {
                playOne = false;
                btnReplay.FlatStyle = FlatStyle.Standard;    // 设置按钮外观为三维
                btnReplay.Text = "单曲循环";
            }
            else
            {
                playOne = true;
                btnReplay.FlatStyle = FlatStyle.Popup;       // 设置按钮外观为平面显示
                btnReplay.Text = "取消循环";
            }
            lstFileList.SelectedIndex = selectOne - 1;
        }        private void lstFileList_DoubleClick(object sender, EventArgs e)
        {
            // 双击播放列表中的媒体文件时，则播放该文件
            btnPlay_Click(sender, e);
            playOne = false;
            btnReplay.Text = "单曲循环";
        }        private void tmrMedia_Tick(object sender, EventArgs e)
        {            // 用Timer控件控制连续播放
            if (mediaPlayer.playState == WMPLib.WMPPlayState.wmppsStopped)
            {
                if (playOne == false)
                {
                    if (selectOne < lstFileList.Items.Count)
                    {
                        selectOne += 1;
                    }
                    else if (selectOne == lstFileList.Items.Count)
                    {
                        // 如果列表中所有媒体文件都播放完毕，则从头开始。
                        selectOne = 1;
                    }
                }
                lstFileList.SelectedIndex = selectOne - 1;
                Play(selectOne);
            }        }希望能帮忙更改一下，谢谢c#

Answer 1

说上下文中没有错误 1 当前上下文中不存在名称“lstFileList” E:\NT\test\LMZshipin\LMZshipin\Form1.cs 51 17 LMZshipin
错误 4 当前上下文中不存在名称“mediaPlayer” E:\NT\test\LMZshipin\LMZshipin\Form1.cs 92 13 LMZshipin
错误 7 当前上下文中不存在名称“odlgMedia” E:\NT\test\LMZshipin\LMZshipin\Form1.cs 119 13 LMZshipin

Answer 2

说上下文中没有错误 1 当前上下文中不存在名称“lstFileList” E:\NT\test\LMZshipin\LMZshipin\Form1.cs 51 17 LMZshipin 错误 4 当前上下文中不存在名称“mediaPlayer” E:\NT\test\LMZshipin\LMZshipin\Form1.cs 92 13 LMZshipin
错误 7 当前上下文中不存在名称“odlgMedia” E:\NT\test\LMZshipin\LMZshipin\Form1.cs 119 13 LMZshipin

Answer 3

所以得出结论你这是复制别人的代码到你机子运行的~~缺少媒体播放组件+一个清单ListBox控件

Answer 4

右键工具箱==〉选择项==〉COM组建==〉勾选Windows Media Player==〉确定在你窗体上放置这个控件(Windows Media Player)!!还有一个ListBox修改控件名称

Answer 5

先不说你说的错误，AddFile函数就有错

Answer 6

if (numOfMusic < 10000) 
应该改为小于9999吧

Answer 7

if (numOfMusic < 10000) 
应该改为小于9999吧
跟索引0没关系，跟最大索引有关系

Answer 8

if (numOfMusic < 10000) 
应该改为小于9999吧
跟索引0没关系，跟最大索引有关系 yes! overflow! 粗心不得了啊