问题
I am using a webBrowser control as the main output window for my application. The first time I use document.write(), the text is completely replaced. The second time the text that I am writing is appended to the end. I have confirmed that I am not writing twice or adding strings too many times by accident. Why would the control behave this way?
回答1:
Call OpenNew before writing the document.
HtmlDocument doc = webBrowser1.Document.OpenNew(true);
doc.Write("<HTML><BODY>This is a new HTML document.</BODY></HTML>");
回答2:
If that doesn't work for you here is another alternative,
webBrowser1.DocumentText = "<HTML><BODY>I am Vinod Srivastav</BODY></HTML>";
which sets the HTML contents of the page displayed in the WebBrowser control.
来源：https://stackoverflow.com/questions/8591918/webbrowser-document-write-irregular-performance