如何在WebBrowser控件C#中突出显示特定单词

Question

我有一个webbrowser控件,我可以得到用户选择的单词.我将这个单词保存在一个文件中,并且使用它我也保存了它的字节偏移量和长度.

让我说我的Web浏览器控件中有一些文本为"Hello Hey Hello"让我们说用户选择了最后一个hello.

现在这个单词和我一起保存,以及其长度等其他信息.

当用户重新加载文件时,我需要提供一个突出显示所选单词的功能,并将该单词及其长度和字节偏移量发送给我

有没有办法做到这一点.

Answer 1

如果你还没有,你将需要导入Microsoft.mshtml程序集引用,并添加

using mshtml;

        if (webBrowser1.Document != null)
        {
            IHTMLDocument2 document = webBrowser1.Document.DomDocument as IHTMLDocument2;
            if (document != null)
            {
                IHTMLBodyElement bodyElement = document.body as IHTMLBodyElement;
                if (bodyElement != null)
                {
                    IHTMLTxtRange trg = bodyElement.createTextRange();


                    if (trg != null)
                    {
                        const String SearchString = "Privacy"; // This is the search string you're looking for.
                        const int wordStartOffset = 421; // This is the starting position in the HTML where the word you're looking for starts at.
                        int wordEndOffset = SearchString.Length;
                        trg.move("character", wordStartOffset);
                        trg.moveEnd("character", wordEndOffset);

                        trg.select();
                    }
                }
            }
        }

这是一个可能也有帮助的片段:

        if (webBrowser1.Document != null)
        {
            IHTMLDocument2 document = webBrowser1.Document.DomDocument as IHTMLDocument2;
            if (document != null)
            {
                IHTMLSelectionObject currentSelection = document.selection;

                IHTMLTxtRange range = currentSelection.createRange() as IHTMLTxtRange;
                if (range != null)
                {
                   const String search = "Privacy";

                   if (range.findText(search, search.Length, 2))
                   {
                       range.select();
                   }
                }
            }
        }