如何用C#进行Winform MP3播放器开发

总结一下,下午半天进行的MP3播放器的开发:

 首先,新建一个解决方案:命名MP3solution,设置FormBorderStyle为None,即上面的图标,最大化最小化按钮隐藏,但如图所示还有最大化关闭按钮,这时自己添加的两个PictureBox控件,下面的暂停,停止,静音等也是PictureBox控件设置其Image属性为properties资源中的图片.如何导入图片资源也是一个关键点。我们点击Properties下的Resources文件，然后在添加资源中添加图片资源PNG图片。值得一提的是，图片控件的BackColor属性设置为Transparent，及显示为背景颜色。别的还有两三个label控件，用来显示播放的是哪首音乐，和当前是否播放还是暂停等状态，还有一个用来显示当天播放到几秒钟的状态，两个hscrollBar进度条一个用来显示当前音乐的播放进度，另一个是显示声音的大小。另外引进一个openFileDialog控件和timer控件，分别用来打开音乐源文件和定期检测播放器的运行状态，及时显示到label控件上。

接下来我们来看看，后台代码段：首先定义四个变量，其作用注释如下：

private PointmouseOffset;//记录鼠标坐标

       private bool ismouseDown = false;//判断是否按下鼠标

boolflag = false;//判断是播放还是打开选择窗口

       static bool MM = true;//记录是否静音

看到窗体最右上角的两个按键最小化和关闭按钮，其代码如下：

       //窗体最小化

       private void pictureBox1_Click(object sender, EventArgs e)

{

           this.WindowState = FormWindowState.Minimized;

}

//关闭按钮

       private void pictureBox2_Click(object sender, EventArgs e)

           Application.Exit();

当初在设置form窗体的FormBorderStyle属性为None的时候，其实就意味着目前的窗体是不能用鼠标来移动了，那我们如何正常移动它呢？这个要我们额外用代码来实现：

#region

移动无边框窗体

       private void pictureBox3_MouseDown(object sender, MouseEventArgs e)

           int xOffset;  

//定义X坐标

           int yOffset;  

//定义Y坐标

           if (e.Button == MouseButtons.Left)

{   //如果鼠标的左键点击了，则将坐标分别进行相应的移动

               xOffset = -e.X;

               yOffset = -e.Y;

               mouseOffset = new Point(xOffset,yOffset);

               ismouseDown = true;  

//将mousedowm变量置为true，说明mousedown了

       private void pictureBox3_MouseMove(object sender, MouseEventArgs e)

{  //如果鼠标移动了

           if (ismouseDown)

               //获取坐标的位置

               Point MousePos = Control.MousePosition;

               MousePos.Offset(mouseOffset.X,mouseOffset.Y);

       Location = MousePos;  //此时获取的坐标的值即为鼠标的坐标

       private void pictureBox3_MouseUp(object sender, MouseEventArgs e)

{ //如果鼠标按键松开了，则将mousedown属性置为false，说明鼠标的左键已经松开

         ismouseDown = false;

       #endregion

int m = 0;

//打开播放按钮，选择要播放的MP3文件

       private void pictureBox4_Click(object sender, EventArgs e)

           if (!flag) 

//如果是打开按钮，则打开文件

               if (openFileDialog1.ShowDialog() == DialogResult.OK)

               {

                   axWindowsMediaPlayer1.URL = openFileDialog1.FileName;

                   m = 1;

                   lblSongTitle.Text = "歌曲名称："

+  axWindowsMediaPlayer1.currentMedia.getItemInfo("Title");

               }

           else

               axWindowsMediaPlayer1.Ctlcontrols.play();

//暂停功能

       private void pictureBox5_Click(object sender, EventArgs e)

           axWindowsMediaPlayer1.Ctlcontrols.pause();

           flag = true;

//停止功能

       private void pictureBox6_Click(object sender, EventArgs e)

  {

           axWindowsMediaPlayer1.Ctlcontrols.stop();

           flag = false;

//静音功能

       private void pictureBox7_Click(object sender, EventArgs e)

           if (MM)

               pictureBox7.Image = (Image)Properties.Resources.音量按钮变色;

               axWindowsMediaPlayer1.settings.mute = true;

               MM = false;

               pictureBox7.Image = (Image)Properties.Resources.音量按钮;

               axWindowsMediaPlayer1.settings.mute = false;

               MM = true;

如何动态设置图片的背景色，即当你点击一个按钮时显示的是不同的图片效果，在这里我们可以这只图片控件的背景图片为资源里面的图片

       private void pictureBox4_MouseEnter(object sender, EventArgs e)

           pictureBox4.Image = (Image)Properties.Resources.播放按钮变;

       private void pictureBox4_MouseLeave(object sender, EventArgs e)

           pictureBox4.Image = (Image)Properties.Resources.播放按钮;

       private void pictureBox5_MouseEnter(object sender, EventArgs e)

           pictureBox5.Image = (Image)Properties.Resources.暂停按钮变;

       private void pictureBox5_MouseLeave(object sender, EventArgs e)

           pictureBox5.Image = (Image)Properties.Resources.暂停按钮;

       private void pictureBox6_MouseEnter(object sender, EventArgs e)

           pictureBox6.Image = (Image)Properties.Resources.停止按钮变;

       private void pictureBox6_MouseLeave(object sender, EventArgs e)

           pictureBox6.Image = (Image)Properties.Resources.停止按钮;

Timer这个类用来定期检测播放器的状态，以便及时更新信息，显示给用户看

       private void timer1_Tick(object sender, EventArgs e)

           int i = (int)axWindowsMediaPlayer1.playState;

           switch (i)

               case 1: lblStauts.Text = "状态：停止";

break;

               case 2: lblStauts.Text = "状态：暂停";

               case 3: lblStauts.Text = "状态：播放";

               case 6: lblStauts.Text = "状态：正在缓冲";

               case 9: lblStauts.Text = "状态：正在连接";

               case 10: lblStauts.Text = "状态：准备就绪";

           lbljindu.Text = axWindowsMediaPlayer1.Ctlcontrols.currentPositionString;

           if (m == 1)

               hScrollBar1.Maximum =

 (int)axWindowsMediaPlayer1.currentMedia.duration;

               hScrollBar1.Minimum = 0;

               hScrollBar1.Value = (int)axWindowsMediaPlayer1.Ctlcontrols.currentPosition;

               hScrollBar2.Value = axWindowsMediaPlayer1.settings.volume;

//音乐播放进程条，用来显示已经播放了多少了

       private void hScrollBar1_Scroll(object sender, ScrollEventArgs e)

           axWindowsMediaPlayer1.Ctlcontrols.currentPosition = e.NewValue;

//声音进程条

       private void hScrollBar2_Scroll(object sender, ScrollEventArgs e)

           axWindowsMediaPlayer1.settings.volume = e.NewValue;

   }

通过一个小小软件的开发，又收获到一些小的知识点，电池没电了，就简单介绍了一下，还有待改进！