winform 添加背景音乐

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
namespace ZSDSystemClient
{
class Mp3Player
{
#region -定义属性-

/* extern修饰符用于声明在外部实现的方法, extern 修饰符的常见用法是在使用Interop 服务调入非托管代码时与 DllImport 属性一起使用；在这种情况下，该方法还必须声明为 static*/

[DllImport("winmm.dll")]
static extern Int32 mciSendString(String command, StringBuilder buffer, Int32 bufferSize, IntPtr hwndCallback);
private string m_musicPath = "";
private IntPtr m_Handle;

#endregion

#region -定义构造函数-

public Mp3Player(string musicPath, IntPtr Handle)
{
m_musicPath = musicPath;
m_Handle = Handle;
}

#endregion

#region - 播放音乐 -
public void Open(string path)
{
if (path != "")
{
try
{
mciSendString("open " + path + " alias media", null, 0, m_Handle);
mciSendString("play media", null, 0, m_Handle);
}
catch (Exception)
{

}
}
}

public void Open()
{
Open(m_musicPath);
}
#endregion

#region - 停止音乐播放 -
public void CloseMedia()
{
try
{
mciSendString("close all", null, 0, m_Handle);
}
catch (Exception)
{
}
}
#endregion
}
}

 调用方式：

Mp3Player mp3 = new Mp3Player(path, Handle);
mp3.CloseMedia();
mp3.Open();