WebBrowser.Document.Body总是空WebBrowser、Document、Body
我有一个 web浏览器文件设置为编辑模式。我试图用 WebBrowser.Document.Body.InnerText 操纵body元素的内部文本，但 WebBrowser.Document.Body 仍然空。
I have a WebBrowser document set to be in edit mode. I am trying to manipulate the inner text of the body element by using WebBrowser.Document.Body.InnerText, however, WebBrowser.Document.Body remains null.
下面是code其中创建该文件的内容：
Here is the code where I create the document contents:
private WebBrowser HtmlEditor = new WebBrowser();
public HtmlEditControl()
{
InitializeComponent();
HtmlEditor.DocumentText = "<html><body></body></html>";
myDoc = (IHTMLDocument2)HtmlEditor.Document.DomDocument;
myDoc.designMode = "On";
HtmlEditor.Refresh(WebBrowserRefreshOption.Completely);
myContentsChanged = false;
}
我可以编辑code，一切都很好，但我不明白为什么 HtmlEditor.Document.Body 仍然空。我知道我可以永远只是重置文档正文每当我需要加载文本的形式，但我会preFER理解为什么是这样表现的方式是，如果不出意外，然后为知识。
I can edit code and everything fine, but I don't understand why HtmlEditor.Document.Body remains null. I know I could always just reset the document body whenever I need to load text into the form, but I would prefer to understand why this is behaving the way it is, if nothing else then for the knowledge.
任何帮助是极大的AP preciated。
Any help on this is greatly appreciated.
推荐答案
您必须等待Web浏览器的DocumentCompleted事件，火灾的DomDocument.Body不为空。我只是测试这个验证。我想，这个问题依然存在：你如何能够通过底层COM接口进行编辑时，该文件还没有完全加载？
You have to wait for the Web Browser's DocumentCompleted event to fire for the DomDocument.Body to not be null. I just tested this to verify. I suppose the question still remains: how are you able to edit through the underlying COM interface when the document has not completely loaded?
我检查，看看是否的IHTMLDocument2指针是在DocumentCompleted和构造相同。它们是，这可能表明基础COM对象重用单个HTML文档对象。好像你在构造函数中所做的任何更改，至少有覆盖掉了或抛出异常的pretty的好机会。
I checked to see if the IHTMLDocument2 pointers were the same in DocumentCompleted and the constructor. They are, which might indicate that the underlying COM object reuses a single HTML document object. It seems like any changes you make in the constructor at least have a pretty good chance of getting overwritten or throwing an exception.
例如，如果我这样做，在构造函数中，我得到一个错误：
For example, if I do this in the constructor, I get an error:
的IHTMLDocument2 P1 =（的IHTMLDocument2）HTMLEditor.Document.DomDocument;
IHTMLDocument2 p1 = (IHTMLDocument2) HTMLEditor.Document.DomDocument;
p1.title =世界，你好！;
p1.title = "Hello world!";
如果我做同样的DocumentCompleted处理程序，它工作正常。
If I do the same in a DocumentCompleted handler, it works fine.
希望这有助于。谢谢你。
Hope this helps. Thanks.
