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C#中用API实现MP3等音频文件的播放类

发布时间:2019-09-13 20:03:40 编辑:笔名

二、用于测试媒体播放类的简单代码:

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.Runtime.InteropServices;

using System.Text;

using System.IO ;

using clsMCIPlay;

namespace MCIPlay

{

/// <summary>

/// Form1 的摘要说明。

/// </summary>

public class Form1 : System.Windows.Forms.Form

{

private System.ComponentModel.IContainer components;

private System.Windows.Forms.Timer timer1;

private System.Windows.Forms.Button Play;

private System.Windows.Forms.Button Stop;

private System.Windows.Forms.Button Puase;

private System.Windows.Forms.Label PlayFileName;

private System.Windows.Forms.Label Duration;

private System.Windows.Forms.Label CurrentPosition;

private System.Windows.Forms.OpenFileDialog openFileDialog1;

private System.Windows.Forms.Button BrowserFile;

clsMCI mp = new clsMCI();

public Form1()

{

//

// Windows 窗体设计器支持所必需的

//

InitializeComponent();

//

// TODO: 在 InitializeComponent 调用后添加任何构造函数代码

//

}

/// <summary>

/// 清理所有正在使用的资源。

/// </summary>

protected override void Dispose( bool disposing )

{

if( disposing )

{

if (components != null)

{

components.Dispose();

}

}

base.Dispose( disposing );

}

#region Windows 窗体设计器生成的代码

/// <summary>

/// 设计器支持所需的方法 - 不要使用代码编辑器修改

/// 此方法的内容。

/// </summary>

private void InitializeComponent()

{

this.components = new System.ComponentModel.Container();

this.Play = new System.Windows.Forms.Button();

this.PlayFileName = new System.Windows.Forms.Label();

this.Duration = new System.Windows.Forms.Label();

this.Stop = new System.Windows.Forms.Button();

this.Puase = new System.Windows.Forms.Button();

this.CurrentPosition = new System.Windows.Forms.Label();

this.timer1 = new System.Windows.Forms.Timer(this.components);

this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();

this.BrowserFile = new System.Windows.Forms.Button();

this.SuspendLayout();

//

// Play

//

this.Play.Location = new System.Drawing.Point(102, 243);

this.Play.Name = "Play";

this.Play.Size = new System.Drawing.Size(78, 24);

this.Play.TabIndex = 0;

this.Play.Text = "Play";

this.Play.Click += new System.EventHandler(this.Play_Click);

//

// PlayFileName

//

this.PlayFileName.AutoSize = true;

this.PlayFileName.Location = new System.Drawing.Point(12, 15);

this.PlayFileName.Name = "PlayFileName";

this.PlayFileName.Size = new System.Drawing.Size(0, 17);

this.PlayFileName.TabIndex = 1;

//

// Duration

//

this.Duration.AutoSize = true;

this.Duration.Location = new System.Drawing.Point(15, 51);

this.Duration.Name = "Duration";

this.Duration.Size = new System.Drawing.Size(0, 17);

this.Duration.TabIndex = 2;

//

// Stop

//

this.Stop.Location = new System.Drawing.Point(282, 243);

this.Stop.Name = "Stop";

this.Stop.Size = new System.Drawing.Size(81, 24);

this.Stop.TabIndex = 3;

this.Stop.Text = "Stop";

this.Stop.Click += new System.EventHandler(this.Stop_Click);

//

// Puase

//

this.Puase.Location = new System.Drawing.Point(198, 243);

this.Puase.Name = "Puase";

this.Puase.Size = new System.Drawing.Size(72, 24);

this.Puase.TabIndex = 4;

this.Puase.Text = "Puase";

this.Puase.Click += new System.EventHandler(this.Puase_Click);

//

// CurrentPosition

//

this.CurrentPosition.AutoSize = true;

this.CurrentPosition.Location = new System.Drawing.Point(15, 87);

this.CurrentPosition.Name = "CurrentPosition";

this.CurrentPosition.Size = new System.Drawing.Size(0, 17);

this.CurrentPosition.TabIndex = 5;

//

// timer1

//

this.timer1.Enabled = true;

this.timer1.Interval = 1000;

this.timer1.Tick += new System.EventHandler(this.timer1_Tick);

//

// BrowserFile

//

this.BrowserFile.Location = new System.Drawing.Point(312, 165);

this.BrowserFile.Name = "BrowserFile";

this.BrowserFile.Size = new System.Drawing.Size(87, 24);

this.BrowserFile.TabIndex = 6;

this.BrowserFile.Text = "SelectFile";

this.BrowserFile.Click += new System.EventHandler(this.BrowserFile_Click);

//

// Form1

//

this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

this.ClientSize = new System.Drawing.Size(433, 287);

this.Controls.Add(this.BrowserFile);

this.Controls.Add(this.CurrentPosition);

this.Controls.Add(this.Puase);

this.Controls.Add(this.Stop);

this.Controls.Add(this.Duration);

this.Controls.Add(this.PlayFileName);

this.Controls.Add(this.Play);

this.Name = "Form1";

this.Text = "Form1";

this.ResumeLayout(false);

}

#endregion

/// <summary>

/// 应用程序的主入口点。

/// </summary>

[STAThread]

static void Main()

{

Application.Run(new Form1());

}

//选择MP3文件播放

private void Play_Click(object sender, System.EventArgs e)

{

try

{

mp.play();

}

catch

{

MessageBox.Show("出错错误!");

}

}

//暂停播放

private void Puase_Click(object sender, System.EventArgs e)

{

try

{

mp.Puase();

}

catch

{

MessageBox.Show("出错错误!");

}

}

//停止播放

private void Stop_Click(object sender, System.EventArgs e)

{

try

{

mp.StopT();

}

catch

{

MessageBox.Show("出错错误!");

}

}

//每秒显示一次播放进度

private void timer1_Tick(object sender, System.EventArgs e)

{

CurrentPosition.Text = mp.CurrentPosition.ToString();

}

//浏览文件

private void BrowserFile_Click(object sender, System.EventArgs e)

{

try

{

openFileDialog1.Filter = "*.mp3|*.mp3";

openFileDialog1.FileName = "";

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

{

mp.FileName = openFileDialog1.FileName ;

PlayFileName.Text = openFileDialog1.FileName ;

Duration.Text = mp.Duration.ToString() ;

}

}

catch

{

MessageBox.Show("出错错误!");

}

}

}

}

本程序在.net 2003 、win XP SP1下编译通过。

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