C#中对ActiveX控件的调用

最新推荐文章于 2021-06-08 21:56:29 发布

转载最新推荐文章于 2021-06-08 21:56:29 发布 · 359 阅读

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/Advance/archive/2005/03/15/119054.html

本文介绍了在C#中调用ActiveX控件编写播放器时遇到的问题及解决方法。MS.NET2003缺少部分动态链接库引用，需手动为msdxm.ocx生成MediaPlayer.dll和AxMediaPlayer.dll，并注册ActiveX控件。还给出了播放器的源程序代码，强调编写多媒体应用要了解ActiveX控件调用过程。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

调用ActiveX控件编写播放器时,遇到了不少问题!

发现MS.NET2003中缺少对一些动态链接库的引用！
在调用ActiveX等多媒体控件时，需要用到的MediaPlayer.dll 和 AxMediaPlayer.dll需要自己生成。
首先用下面的命令为媒体播放器控件：msdxm.ocx 生成 MediaPlayer.dll 和 AxMediaPlayer.dll。
aximp c:\winnt\system32\msdxm.ocx

而通常msdxm.ocx中的ActiveX控件都未注册!
再运行regsvr32 msdxm.ocx手动注册便生成需要的动态连接库文件.
再如图2所示，在项目中添加对MediaPlayer.dll 和 AxMediaPlayer.dll的引用；
并在程序中插入：using MediaPlayer便完成了整个调用过程！

播放器如图:

源程序代码如下：

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using MediaPlayer;

namespace AdvancePlayer

{

/**//// <summary>

/// Form1 的摘要说明。

/// </summary>

public class Form1 : System.Windows.Forms.Form

{

private AxMediaPlayer.AxMediaPlayer axWindowsMediaPlayer1;

private System.Windows.Forms.OpenFileDialog openFileDialog1;

private System.Windows.Forms.MainMenu mainMenu1;

private System.Windows.Forms.MenuItem menuItemOpen;

private System.Windows.Forms.MenuItem menuItemClose;

private System.Windows.Forms.MenuItem menuItemInitSize;

private System.Windows.Forms.MenuItem menuItemFullScreen;

private System.Windows.Forms.MenuItem menuItemShowAudioCtrl;

private System.Windows.Forms.MenuItem menuItemShowPositionCtrl;

private System.Windows.Forms.MenuItem menuItemShowTrackbarCtrl;

private System.Windows.Forms.MenuItem menuItemFile;

private System.Windows.Forms.MenuItem menuItemVideo;

private System.Windows.Forms.MenuItem menuItemWindow;

/**//// <summary>

/// 必需的设计器变量。

/// </summary>

private System.ComponentModel.Container components = null;

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 );

}

Windows 窗体设计器生成的代码#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()

{

System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));

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

this.mainMenu1 = new System.Windows.Forms.MainMenu();

this.menuItemFile = new System.Windows.Forms.MenuItem();

this.menuItemOpen = new System.Windows.Forms.MenuItem();

this.menuItemClose = new System.Windows.Forms.MenuItem();

this.menuItemVideo = new System.Windows.Forms.MenuItem();

this.menuItemInitSize = new System.Windows.Forms.MenuItem();

this.menuItemFullScreen = new System.Windows.Forms.MenuItem();

this.menuItemWindow = new System.Windows.Forms.MenuItem();

this.menuItemShowAudioCtrl = new System.Windows.Forms.MenuItem();

this.menuItemShowPositionCtrl = new System.Windows.Forms.MenuItem();

this.menuItemShowTrackbarCtrl = new System.Windows.Forms.MenuItem();

this.axWindowsMediaPlayer1 = new AxMediaPlayer.AxMediaPlayer();

((System.ComponentModel.ISupportInitialize)(this.axWindowsMediaPlayer1)).BeginInit();

this.SuspendLayout();

// openFileDialog1

this.openFileDialog1.FileOk += new System.ComponentModel.CancelEventHandler(this.openFileDialog1_FileOk);

// mainMenu1

this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[]

{

this.menuItemFile,

this.menuItemVideo,

this.menuItemWindow});

// menuItemFile

this.menuItemFile.Index = 0;

this.menuItemFile.MenuItems.AddRange(new System.Windows.Forms.MenuItem[]

{

this.menuItemOpen,

this.menuItemClose});

this.menuItemFile.Shortcut = System.Windows.Forms.Shortcut.CtrlF;

this.menuItemFile.Text = "文件(&F)";

// menuItemOpen

this.menuItemOpen.Index = 0;

this.menuItemOpen.Shortcut = System.Windows.Forms.Shortcut.CtrlO;

this.menuItemOpen.Text = "打开(&O)";

this.menuItemOpen.Click += new System.EventHandler(this.menuItemOpen_Click);

this.menuItemOpen.Select += new System.EventHandler(this.Form1_Load);

// menuItemClose

this.menuItemClose.Index = 1;

this.menuItemClose.Shortcut = System.Windows.Forms.Shortcut.CtrlC;

this.menuItemClose.Text = "关闭(&C)";

this.menuItemClose.Click += new System.EventHandler(this.menuItemClose_Click);

// menuItemVideo

this.menuItemVideo.Index = 1;

this.menuItemVideo.MenuItems.AddRange(new System.Windows.Forms.MenuItem[]

{

this.menuItemInitSize,

this.menuItemFullScreen});

this.menuItemVideo.Shortcut = System.Windows.Forms.Shortcut.CtrlV;

this.menuItemVideo.Text = "视频(&V)";

// menuItemInitSize

this.menuItemInitSize.Index = 0;

this.menuItemInitSize.Shortcut = System.Windows.Forms.Shortcut.CtrlI;

this.menuItemInitSize.Text = "默认尺寸(&I)";

this.menuItemInitSize.Click += new System.EventHandler(this.menuItemInitSize_Click);

// menuItemFullScreen

this.menuItemFullScreen.Index = 1;

this.menuItemFullScreen.Shortcut = System.Windows.Forms.Shortcut.CtrlF;

this.menuItemFullScreen.Text = "全屏(&F)";

this.menuItemFullScreen.Click += new System.EventHandler(this.menuItemFullScreen_Click);

// menuItemWindow

this.menuItemWindow.Index = 2;

this.menuItemWindow.MenuItems.AddRange(new System.Windows.Forms.MenuItem[]

{

this.menuItemShowAudioCtrl,

this.menuItemShowPositionCtrl,

this.menuItemShowTrackbarCtrl});

this.menuItemWindow.Shortcut = System.Windows.Forms.Shortcut.CtrlW;

this.menuItemWindow.Text = "窗口(&W)";

// menuItemShowAudioCtrl

this.menuItemShowAudioCtrl.Checked = true;

this.menuItemShowAudioCtrl.Index = 0;

this.menuItemShowAudioCtrl.Shortcut = System.Windows.Forms.Shortcut.CtrlU;

this.menuItemShowAudioCtrl.Text = "音频控制(&U)";

this.menuItemShowAudioCtrl.Click += new System.EventHandler(this.menuItemShowAudioCtrl_Click);

// menuItemShowPositionCtrl

this.menuItemShowPositionCtrl.Checked = true;

this.menuItemShowPositionCtrl.Index = 1;

this.menuItemShowPositionCtrl.Shortcut = System.Windows.Forms.Shortcut.CtrlP;

this.menuItemShowPositionCtrl.Text = "播放进度(&P)";

this.menuItemShowPositionCtrl.Click += new System.EventHandler(this.menuItemShowPositionCtrl_Click);

// menuItemShowTrackbarCtrl

this.menuItemShowTrackbarCtrl.Checked = true;

this.menuItemShowTrackbarCtrl.Index = 2;

this.menuItemShowTrackbarCtrl.Shortcut = System.Windows.Forms.Shortcut.CtrlT;

this.menuItemShowTrackbarCtrl.Text = "滚动条(&T)";

this.menuItemShowTrackbarCtrl.Click += new System.EventHandler(this.menuItemShowTrackbarCtrl_Click);

// axWindowsMediaPlayer1

this.axWindowsMediaPlayer1.Location = new System.Drawing.Point(0, -8);

this.axWindowsMediaPlayer1.Name = "axWindowsMediaPlayer1";

this.axWindowsMediaPlayer1.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("axWindowsMediaPlayer1.OcxState")));

this.axWindowsMediaPlayer1.Size = new System.Drawing.Size(296, 280);

this.axWindowsMediaPlayer1.TabIndex = 0;

// Form1

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

this.BackColor = System.Drawing.SystemColors.Control;

this.ClientSize = new System.Drawing.Size(292, 273);

this.Controls.Add(this.axWindowsMediaPlayer1);

this.ForeColor = System.Drawing.SystemColors.ControlText;

this.Menu = this.mainMenu1;

this.Name = "Form1";

this.Text = "Form1";

this.Load += new System.EventHandler(this.Form1_Load);

((System.ComponentModel.ISupportInitialize)(this.axWindowsMediaPlayer1)).EndInit();

this.ResumeLayout(false);

}

#endregion

/**//// <summary>

/// 应用程序的主入口点。

/// </summary>

[STAThread]

static void Main()

{

Application.Run(new Form1());

}

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

{

//打开的文件类型

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

{

axWindowsMediaPlayer1.FileName = openFileDialog1.FileName;

//如果打开的是音频文件，则禁止【视频】菜单组

if(openFileDialog1.FilterIndex == 2)

menuItemVideo.Enabled = false;

else

menuItemVideo.Enabled = true;

}

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

{

axWindowsMediaPlayer1.FileName = null;

menuItemVideo.Enabled = false;

}

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

{

axWindowsMediaPlayer1.DisplaySize = MPDisplaySizeConstants.mpDefaultSize;

}

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

{

axWindowsMediaPlayer1.DisplaySize = MPDisplaySizeConstants.mpFullScreen;

}

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

{

menuItemShowAudioCtrl.Checked = !menuItemShowAudioCtrl.Checked;

axWindowsMediaPlayer1.ShowTracker = false;

axWindowsMediaPlayer1.ShowTracker = menuItemShowTrackbarCtrl.Checked;

axWindowsMediaPlayer1.ShowAudioControls = menuItemShowAudioCtrl.Checked;

}

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

{

menuItemShowPositionCtrl.Checked = !menuItemShowPositionCtrl.Checked;

axWindowsMediaPlayer1.ShowPositionControls = menuItemShowPositionCtrl.Checked;

}

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

{

menuItemShowTrackbarCtrl.Checked = !menuItemShowTrackbarCtrl.Checked;

axWindowsMediaPlayer1.ShowAudioControls = false;

axWindowsMediaPlayer1.ShowTracker = menuItemShowTrackbarCtrl.Checked;

axWindowsMediaPlayer1.ShowAudioControls = menuItemShowAudioCtrl.Checked;

}

private void openFileDialog1_FileOk(object sender, System.ComponentModel.CancelEventArgs e)

{

openFileDialog1.OpenFile();

}

private void Form1_Load(object sender, System.EventArgs e)

{

}

（图2）

      如图2中选中的AxMediaPlayer和MediaPlayer既需自己生成的dll，2003系统默认中无迹可寻！他们所起的作用便是实现对ActiceX中播放器相关的函数的调用！
      所以，对于多媒体应用程序的编写，关键在于了解对ActiveX相关控件的调用过程！

      充分使用.NET中的控件技术，无疑是最直接和最高效的选择，这给我们提供了很大的方便，以往很多需要自己编写的函数和功能，现在都为我们封装成了各种控件，直接调用便可实现！相比往日，效率提高了不少！但其中相关的实现过程和细节还是应该多加了解才好，毕竟，只有让其工作原理烂熟于心，才能将.NET这门强大的技术运用得炉火纯青！

转载于:https://www.cnblogs.com/Advance/archive/2005/03/15/119054.html