http://topic.csdn.net/u/20080524/13/135f43bb-f452-4538-bebe-6b1204173ca7.html
webBrowser_Logo2.Navigate("about:blank");
然后
webBrowser1.Document.InnerHtml = " <b>b </b>";
或
webBrowser1.Document.Write(str);
hehe.多谢上面两位的提示,其实用webBrowser1.DocumentText(str); 即可