在线等C#windows程序设计

C# code

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace Maze{    public partial class Form1 : Form    {        public Form1()        {            //This SoundPlayer plays a sound whenever the player hits a wall.            System.Media.SoundPlayer startSoundPlayer = new System.Media.SoundPlayer(@"E:\KwDownload\song\Jimi Hendrix-Voodoo Chile Blues.mp3");                        // This SoundPlayer plays a sound when the player finishes the game.            System.Media.SoundPlayer finishSoundPlayer = new System.Media.SoundPlayer(@"E:\KwDownload\song\Jimi Hendrix-Red House.mp3");                        InitializeComponent();            MoveToStart();        }        private void finishLabel_MouseEnter(object sender, EventArgs e)        {            //Show a congratulatory Messagebox,then close the form                        MessageBox.Show("Congratulations!");            Close();        }        /// <summary>        /// Move the pointer to a point 10 pixels down and to the right        /// of the starting point in the upper-left corner of the maze.        /// Play a sound, then move the mouse pointer to a point 10 pixels down and to         /// the right of the starting point in the upper-left corner of the maze.        /// </summary>        private void MoveToStart()        {          [color=#FF0000]  startSoundPlayer.Play();[/color]            Point startingPoint = panel1.Location;            startingPoint.Offset(10,10);            Cursor.Position = PointToScreen(startingPoint);        }        private void wall_MouseEnter(object sender, EventArgs e)        {            // When the mouse pointer hits a wall or enters the panel,            // call the MoveToStart() method.            MoveToStart();        }           }}

startSoundPlayer.Play();显示上下文不存在，如何解决

[解决办法]
startSoundPlayer是构造函数中的局部变量，你MoveToStart方法中使用不了
把startSoundPlayer放到全局
[解决办法]
把定义移到form1()上面。定义成全局的