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28.3.5 在Windows窗体中使用ActiveX控件
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28.3.5 在Windows窗体中使用ActiveX控件
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<div style='float:left;width:49%'>·<a href='100165723.htm'>28.3.2 创建Runtime Callable Wrapper</a></div><div style='float:right;width:49%'>·<a href='100165724.htm'>28.3.3 线程问题</a></div><div style='float:left;width:49%'>·<a href='100165725.htm'>28.3.4 添加连接点</a></div><div style='float:right;width:49%'>·<a href='100165727.htm'>28.3.6 在ASP.NET中使用COM对象</a></div><div style='float:left;width:49%'>·<a href='100165728.htm'>28.4 在COM客户程序中使用.NET组件</a></div><div style='float:right;width:49%'>·<a href='100165729.htm'>28.4.1 COM Callable Wrapper</a></div></div>
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<div id="text"> <link href="css.css" rel="stylesheet" type="text/css" /><h3 style='margin-top:8.15pt;margin-right:0cm;FTEL:8.15pt;margin-left:
0cm'><span lang=EN-US>28.3.5 </span><span style='font-family:黑体'>在</span><span
lang=EN-US>Windows</span><span style='font-family:黑体'>窗体中使用</span><span
lang=EN-US>ActiveX</span><span style='font-family:黑体'>控件</span></h3>
<p class=MsoNormal><span lang=EN-US>ActiveX</span><span style='font-family:
宋体'>控件是带有一个用户界面和许多可选</span><span lang=EN-US>COM</span><span style='font-family:
宋体'>接口的</span><span lang=EN-US>COM</span><span style='font-family:宋体'>对象，这些</span><span
lang=EN-US>COM</span><span style='font-family:宋体'>接口可以处理用户界面，与容器进行交互操作。</span><span
lang=EN-US>ActiveX</span><span style='font-family:宋体'>控件可以被许多不同的容器使用，例如</span><span
lang=EN-US>Internet Explorer</span><span style='font-family:宋体'>、</span><span
lang=EN-US>Word</span><span style='font-family:宋体'>、</span><span lang=EN-US>Excel</span><span
style='font-family:宋体'>，用</span><span lang=EN-US>VB6</span><span
style='font-family:宋体'>、</span><span lang=EN-US>MFC(Microsoft Foundation
Classes)</span><span style='font-family:宋体'>或</span><span lang=EN-US>ATL(Active
Template Library)</span><span style='font-family:宋体'>编写的应用程序。</span><span
lang=EN-US>Windows</span><span style='font-family:宋体'>窗体应用程序是另一个可以管理</span><span
lang=EN-US>ActiveX</span><span style='font-family:宋体'>控件的容器。</span><span
lang=EN-US>ActiveX</span><span style='font-family:宋体'>控件可以像前面讨论的</span><span
lang=EN-US>Windows</span><span style='font-family:宋体'>窗体控件那样使用。</span></p>
<h4 style='FTEL:21.45pt'><span lang=EN-US>1.</span><span lang=EN-US
style='font-family:宋体'> </span><span lang=EN-US>ActiveX</span><span
style='font-family:黑体'>控件导入器</span></h4>
<p class=MsoNormal style='line-height:18.0pt'><span style='font-family:宋体'>与</span><span
lang=EN-US>RCW</span><span style='font-family:宋体'>一样，也可以为</span><span
lang=EN-US>ActiveX</span><span style='font-family:宋体'>控件创建包装器。</span><span
lang=EN-US>ActiveX</span><span style='font-family:宋体'>控件的包装器可以使用命令行实用工具</span><span
lang=EN-US>Windows Forms ActiveX Control Importer(aximp.exe)</span><span
style='font-family:宋体'>来创建。这个实用工具会创建一个派生于基类</span><span lang=EN-US>System.Windows.Forms.AxHost</span><span
style='font-family:宋体'>的类，它用作包装器，以使用</span><span lang=EN-US>ActiveX</span><span
style='font-family:宋体'>控件。</span></p>
<p class=MsoNormal style='line-height:18.0pt'><span style='font-family:宋体'>在</span><span
lang=EN-US>Web</span><span style='font-family:宋体'>窗体控件中输入下面的命令，就可以创建一个包装器类：</span></p>
<p class=a5 style='margin-top:8.15pt;margin-right:0cm;FTEL:0cm;
margin-left:21.45pt;FTEL:.0001pt;FTEL:18.45pt'><b><span
lang=EN-US>aximp c:\windows\system32\shdocvw.dll</span></b></p>
<h4 style='FTEL:21.45pt'><span lang=EN-US>2. </span><span
style='font-family:黑体'>创建</span><span lang=EN-US>Windows</span><span
style='font-family:黑体'>窗体应用程序</span></h4>
<p class=MsoNormal style='line-height:18.0pt'><span style='font-family:宋体'>要查看</span><span
lang=EN-US>ActiveX</span><span style='font-family:宋体'>控件在</span><span
lang=EN-US>Windows</span><span style='font-family:宋体'>窗体应用程序中的运行情况，需要创建一个简单的</span><span
lang=EN-US>Windows</span><span style='font-family:宋体'>窗体应用程序项目。在这个应用程序中，建立一个简单的</span><span
lang=EN-US>Internet</span><span style='font-family:宋体'>浏览器，它使用来自操作系统的</span><span
lang=EN-US>Web Browser</span><span style='font-family:宋体'>控件。</span></p>
<p class=MsoNormal style='line-height:18.0pt'><span style='font-family:宋体'>创建如图</span><span
lang=EN-US>28-10</span><span style='font-family:宋体'>所示的窗体，该窗体应包含一个用于输入</span><span
lang=EN-US>URL</span><span style='font-family:宋体'>、名称是</span><span lang=EN-US>textUrl</span><span
style='font-family:宋体'>的文本框，</span><span lang=EN-US>3</span><span
style='font-family:宋体'>个浏览</span><span lang=EN-US>Web</span><span
style='font-family:宋体'>页面的按钮，其名称分别是</span><span lang=EN-US>buttomNavigate</span><span
style='font-family:宋体'>、</span><span lang=EN-US>buttonBack</span><span
style='font-family:宋体'>和</span><span lang=EN-US>buttonForward</span><span
style='font-family:宋体'>，最后还有一个名为</span><span lang=EN-US>statusBar</span><span
style='font-family:宋体'>的状态栏。</span></p>
<p class=a><span lang=EN-US><img width=371 height=248
src="28/image011.jpg"></span></p>
<p class=10><span style='font-family:宋体'>图</span><span lang=EN-US> 28-10</span></p>
<p class=MsoNormal style='line-height:18.0pt'><span style='font-family:宋体'>使用</span><span
lang=EN-US>Visual Studio .NET</span><span style='font-family:宋体'>，可以把</span><span
lang=EN-US>ActiveX</span><span style='font-family:宋体'>控件添加到工具栏中，以与</span><span
lang=EN-US>Windows</span><span style='font-family:宋体'>窗体控件相同的方式使用它们。在</span><span
lang=EN-US>Customize Toolbox</span><span style='font-family:宋体'>快捷菜单中，选择菜单项</span><span
lang=EN-US>Add | Remove Items</span><span style='font-family:宋体'>，再在</span><span
lang=EN-US>COM Components</span><span style='font-family:宋体'>类别中选择</span><span
lang=EN-US>Microsoft Web Browser</span><span style='font-family:宋体'>控件，如图</span><span
lang=EN-US>28-11</span><span style='font-family:宋体'>所示。</span></p>
<p class=a><span lang=EN-US><img width=392 height=276
src="28/image012.jpg"></span></p>
<p class=10><span style='font-family:宋体'>图</span><span lang=EN-US> 28-11</span></p>
<p class=MsoNormal><span style='font-family:宋体'>这样，图标就会显示在工具栏上，与其他</span><span
lang=EN-US>Windows</span><span style='font-family:宋体'>控件类似，可以把这个图标拖放到</span><span
lang=EN-US>Windows</span><span style='font-family:宋体'>窗体设计器中，以创建</span><span
lang=EN-US>(</span><span style='font-family:宋体'>使用</span><span lang=EN-US>aximp</span><span
style='font-family:宋体'>实用工具</span><span lang=EN-US>)</span><span
style='font-family:宋体'>包含</span><span lang=EN-US>ActiveX</span><span
style='font-family:宋体'>控件的包装器程序集。在项目中使用引用可以看到包装器程序集：</span><span lang=EN-US>AxSHDocVw</span><span
style='font-family:宋体'>和</span><span lang=EN-US>SHDocVw</span><span
style='font-family:宋体'>。现在可以使用生成的变量</span><span lang=EN-US>axWebBrowser1</span><span
style='font-family:宋体'>调用控件的方法，如下面的代码所示。给按钮</span><span lang=EN-US>buttomNavigate</span><span
style='font-family:宋体'>添加一个</span><span lang=EN-US>click</span><span
style='font-family:宋体'>事件处理程序，让浏览器导航到</span><span lang=EN-US>Web</span><span
style='font-family:宋体'>页面上。为这个目的而使用的方法</span><span lang=EN-US>Navigate()</span><span
style='font-family:宋体'>需要在它的第一个参数中传递一个</span><span lang=EN-US>URL</span><span
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