• 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FormBorderStyleNone,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;   //mousedowm变量置为true,说明mousedown

                }

            }

     

           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

               if (e.Button == MouseButtons.Left)

                    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;

                }

               else

                {

                   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"; break;

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

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

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

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

                }

               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!

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  • 原文地址:https://www.cnblogs.com/java20130723/p/3211534.html
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