在WebBrowser控件中绕过查找对话框 [英] Bypass Find dialog box in WebBrowser control
问题描述
我有一个文本框，用户输入要搜索的字符串和搜索按钮。单击按钮时，HTML文档中的匹配项需要高亮显示 - 完全按照查找对话框中的实现。
有没有办法绕过查找对话框在WebBrowser控件框？是否有可能将搜索参数发送到查找功能？
感谢您的帮助。
<理想情况下，我将能够使用查找对话框提供的全部功能，包括匹配整个世界，编辑，编辑，编辑 ，Match case和Highlight all matches...
我终于找到了一个解决方案。它有点混乱，但它为Winforms WebBrowser控件的预期工作。这是在.Net 4.0中，Microsoft.mshtml 7.0.3300引用导入。
使用mshtml;
private int _findClicks = 0;
私人字符串_searchText =;
public string SearchText
{
get {return _searchText; }
set
{
if（value.ToUpper（）！= _searchText）
{
ClearFind（）;
_searchText = value.ToUpper（）;
txtSearch.Text = value.ToUpper（）;
_findClicks = 0;
$ private void btnSearch_Click（object sender，EventArgs e）
{
SearchText = txtSearch.Text;
if（_findClicks == 0）
FindFirst（）;
else
FindNext（）;
}
///< summary>
///搜索所有文本以查找。将所有的事件设置为背景颜色黄色。
///< / summary>
private void FindFirst（）
{
if（_searchText ==）
return;
IHTMLDocument2 doc = webBrowser1.Document.DomDocument as IHTMLDocument2;
IHTMLSelectionObject sel = doc.selection;
IHTMLTxtRange range = sel.createRange（）as IHTMLTxtRange;
//标记所有出现的背景色黄色
while（true）
{
if（（range.findText（_searchText））&&& amp;（range.htmlText！= span style ='background-color：yellow;'>+ _searchText +< / span>））
{
range.pasteHTML（< span style ='background-color ：yellow;'>+ _searchText +< / span>）;
}
else
break;
}
//移至开头并选择第一个出现。
range.moveStart（word，-9999999）;
range.findText（_searchText）;
range.select（）;
_findClicks ++;
}
///< summary>
///查找下一个搜索到的文本并选择它。
///< / summary>
private void FindNext（）
{
if（_searchText ==）
return;
IHTMLDocument2 doc = webBrowser1.Document.DomDocument as IHTMLDocument2;
IHTMLSelectionObject sel = doc.selection;
IHTMLTxtRange range = sel.createRange（）as IHTMLTxtRange;
range.collapse（false）; / /折叠当前选择，所以我们从前一个范围的结尾开始
if（range.findText（_searchText，1000000，0））
{
range.select ）;
}
else //如果在列表结尾处，则转到开始处并再搜索一次。
{
range.moveStart（word，-9999999）;
if（range.findText（_searchText，1000000，0））
{
range.select（）;
}
}
}
///< summary>
///删除之前搜索的所有单词的突出显示。
///< / summary>
private void ClearFind（）
{
if（_searchText ==|| webBrowser1.ReadyState！= WebBrowserReadyState.Complete）
return;
IHTMLDocument2 doc = webBrowser1.Document.DomDocument as IHTMLDocument2;
IHTMLSelectionObject sel = doc.selection;
IHTMLTxtRange range = sel.createRange（）as IHTMLTxtRange;
range.moveStart（word，-9999999）; （$）
while（true）
{
if（（range.findText（_searchText））&&（！range.htmlText.Contains（span style ='background-color：white ）））
{
range.pasteHTML（< span style ='background-color：white;'>+ _searchText +< / span>）;
}
else
break;
$ b code $
$ b $ p
$ b 大概可以清理一下。这几乎复制了Web浏览器控件中Ctrl + F功能的基础知识。希望对所有未来的读者都有所帮助。
I need to implement the Search functionality provided by the Find dialog box which pops up when Ctrl+F is pressed.
I have a textbox where the user enters the string to be searched for, and a "Search" button. When the button is clicked clicked, matches in the HTML document need to be highlighted - exactly as implemented in the Find dialog box.
Is there a way to bypass the Find dialog box in a WebBrowser control? Is it possible to send the search parameters to the "find" functionality?
Thanks in advance for the help.
EDIT
Ideally, I would be able to use the full functionality provided by the Find dialog box, including "Match whole world only", "Match case" and "Highlight all matches"...
解决方案 I had a lot of difficulty with this one, but I finally got a solution working. It's somewhat messy but it works as intended for the Winforms WebBrowser control. This is in .Net 4.0 with the Microsoft.mshtml 7.0.3300 reference imported.
using mshtml;
private int _findClicks = 0;
private string _searchText = "";
public string SearchText
{
get { return _searchText; }
set
{
if (value.ToUpper() != _searchText)
{
ClearFind();
_searchText = value.ToUpper();
txtSearch.Text = value.ToUpper();
_findClicks = 0;
}
}
}
private void btnSearch_Click(object sender, EventArgs e)
{
SearchText = txtSearch.Text;
if (_findClicks == 0)
FindFirst();
else
FindNext();
}
/// <summary>
/// Search through all text to find. Sets all occurrences to background color yellow.
/// </summary>
private void FindFirst()
{
if (_searchText == "")
return;
IHTMLDocument2 doc = webBrowser1.Document.DomDocument as IHTMLDocument2;
IHTMLSelectionObject sel = doc.selection;
IHTMLTxtRange range = sel.createRange() as IHTMLTxtRange;
//Mark all occurrences with background color yellow
while (true)
{
if ((range.findText(_searchText)) && (range.htmlText != "span style='background-color: yellow;'>" + _searchText + "</span>"))
{
range.pasteHTML("<span style='background-color: yellow;'>" + _searchText + "</span>");
}
else
break;
}
//Move to beginning and select first occurence.
range.moveStart("word", -9999999);
range.findText(_searchText);
range.select();
_findClicks++;
}
/// <summary>
/// Finds next occurrence of searched text and selects it.
/// </summary>
private void FindNext()
{
if (_searchText == "")
return;
IHTMLDocument2 doc = webBrowser1.Document.DomDocument as IHTMLDocument2;
IHTMLSelectionObject sel = doc.selection;
IHTMLTxtRange range = sel.createRange() as IHTMLTxtRange;
range.collapse(false); // collapse the current selection so we start from the end of the previous range
if (range.findText(_searchText, 1000000, 0))
{
range.select();
}
else // If at end of list, go to beginning and search one more time.
{
range.moveStart("word", -9999999);
if (range.findText(_searchText, 1000000, 0))
{
range.select();
}
}
}
/// <summary>
/// Remove highlighting on all words from previous search.
/// </summary>
private void ClearFind()
{
if (_searchText == "" || webBrowser1.ReadyState != WebBrowserReadyState.Complete)
return;
IHTMLDocument2 doc = webBrowser1.Document.DomDocument as IHTMLDocument2;
IHTMLSelectionObject sel = doc.selection;
IHTMLTxtRange range = sel.createRange() as IHTMLTxtRange;
range.moveStart("word", -9999999);
while (true)
{
if ((range.findText(_searchText)) && (!range.htmlText.Contains("span style='background-color: white")))
{
range.pasteHTML("<span style='background-color: white;'>" + _searchText + "</span>");
}
else
break;
}
}
Again, this is somewhat messy and could probably be cleaned up quite a bit. This pretty much replicates the basics of the Ctrl+F function in the Web Browser control. Hope it helps to all future readers.
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