数学建模社区-数学中国

标题: BCB代码 [打印本页]

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作者: findingit    时间: 2007-1-25 17:03
标题: BCB代码
&nbsp;WebBrowser &nbsp; 控件的IWebBrowser2::get_Document &nbsp; 属性返回表示顶层框架的DHTML &nbsp; 对象模型的文档对象。MSHTML &nbsp; 通过文档对象和其他HTML元素对象，例如Frame, &nbsp; IFrame等等实现的IPersistStreamInit，IPersistFile等接口提供使用流载入和保存HTML的功能。对象的IDispatch &nbsp; 接口可用于通过使用QueryInterface和IID_IPersistStreamInit &nbsp; 等接口标识查询相应接口指针，如下列代码示例所述. &nbsp; <br/>&nbsp; &nbsp; <br/>&nbsp; HRESULT &nbsp; LoadWebBrowserFromStream(IWebBrowser2* &nbsp; pWebBrowser, &nbsp; IStream* &nbsp; pStream) &nbsp; <br/>&nbsp; { &nbsp; <br/>&nbsp; HRESULT &nbsp; hr; &nbsp; <br/>&nbsp; IDispatch* &nbsp; pHtmlDoc &nbsp; = &nbsp; NULL; &nbsp; <br/>&nbsp; IPersistStreamInit* &nbsp; pPersistStreamInit &nbsp; = &nbsp; NULL; &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // &nbsp; 返回文档对象. &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; hr &nbsp; = &nbsp; pWebBrowser-&gt;get_Document( &nbsp; &amp;pHtmlDoc &nbsp; ); &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if &nbsp; ( &nbsp; SUCCEEDED(hr) &nbsp; ) &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; { &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // &nbsp; &gt;查询 &nbsp; IPersistStreamInit接口 &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; hr &nbsp; = &nbsp; pHtmlDoc-&gt;QueryInterface( &nbsp; IID_IPersistStreamInit, &nbsp; &nbsp; (void**)&amp;pPersistStreamInit &nbsp; ); &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if &nbsp; ( &nbsp; SUCCEEDED(hr) &nbsp; ) &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; { &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // &nbsp; 初始化文档. &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; hr &nbsp; = &nbsp; pPersistStreamInit-&gt;InitNew(); &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if &nbsp; ( &nbsp; SUCCEEDED(hr) &nbsp; ) &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; { &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // &nbsp; 载入流内容 &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; hr &nbsp; = &nbsp; pPersistStreamInit-&gt;Load( &nbsp; pStream &nbsp; ); &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; } &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; pPersistStreamInit-&gt;Release(); &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; } &nbsp; <br/>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; } &nbsp; <br/>&nbsp; } &nbsp; <br/>&nbsp; 使用IPersist*接口载入和保存HTML内容 &nbsp; <br/>&nbsp; IPersistStreamInit &nbsp; 接口具有用于从流初始化和载入HTML内容的InitNew &nbsp; 和Load &nbsp; 方法以及用于保存的Save方法。InitNew &nbsp; 方法初始化流到一个已知状态，Load &nbsp; 方法从流载入HTML内容，Save方法将HTML内容保存到流。

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作者: 王靖博    时间: 2017-5-15 00:36
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