html - .Net WebBrowser.DocumentText Isn't Changing!

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html - .Net WebBrowser.DocumentText Isn't Changing!

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

In my vb.net program, I am using a webbrowser to show the user an HTML preview. I was previously hitting a server to grab the HTML, then returning on an asynchronous thread and raising an event to populate the WebBrowser.DocumentText with the HTML string I was returning.

Now I set it up to grab all of the information on the client, without ever having to hit the server, and I'm trying to raise the same event. I watch the code go through, and it has the HTML string correct and everything, but when I try to do

browser.DocumentText = _emailHTML

the contents of DocumentText remain as "<HTML></HTML>"

I was just wondering why the DocumentText was not being set. Anyone have any suggestions?

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1 Answer

深蓝 · Answer 1 · 2021-10-23T17:48:34+0000

Try the following:

browser.Navigate("about:blank");
HtmlDocument doc = browser.Document;
doc.Write(String.Empty);
browser.DocumentText = _emailHTML;

I've found that the WebBrowser control usually needs to be initialized to about:blank anyway. The same needs to be done between navigates to different types of content (like text/xml to text/html) because the renderer is different (mshtml for text/html, something else for text/xml).

(via http://geekswithblogs.net/paulwhitblog/archive/2005/12/12/62961.aspx)

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html - .Net WebBrowser.DocumentText Isn't Changing!

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