在 iframe 中的元素上使用 getElementById [英] getElementById on element within an iframe
问题描述
我当前的代码适用于 iframe 之外的元素.我应该如何使用 getElementById 在 iframe 中获取元素?我的最终目标是在 <body id="tinymce"><p>...</p></body> 标签中写入文本.我没有使用 webBrowser 控件 - 这是用于 iexplore 的外部实例
My current code works on elements outside of an iframe. How should I approach fetching elements within an iframe using getElementById? My end goal is to write text within the the <body id="tinymce"><p>...</p></body> tags. I am not using a webBrowser control - this is for an external instance of iexplore
HTML 示例
代码示例
foreach (InternetExplorer ie in new ShellWindowsClass())
{
if (ie.LocationURL.ToString().IndexOf("intranet_site_url") != -1)
{
IWebBrowserApp wb = (IWebBrowserApp)ie;
while (wb.Busy) { Thread.Sleep(100); }
HTMLDocument document = ((HTMLDocument)wb.Document);
// FETCH BY ID
IHTMLElement element;
HTMLInputElementClass hitem;
element = document.getElementById("tinymce");
hitem = (HTMLInputElementClass)element;
hitem.value = first_name;
// FETCH BY ID in IFRAME
IHTMLFramesCollection2 hframes = document.frames;
for (int i = 0; i < hframes.length; i++)
{
object ref_index = i;
IHTMLWindow2 currentFrame = (IHTMLWindow2)hframes.item(ref ref_index);
if (currentFrame != null)
{
MessageBox.Show(currentFrame.name);
// what to do from here?
}
else
MessageBox.Show("Null");
}
}
}
- 更新想法有机会在下面调整我的想法吗?
- update idea Chance of adapting my idea below?
if (currentFrame != null)
{
MessageBox.Show(currentFrame.name);
HTMLDocument document_sub = ((HTMLDocument)currentFrame.document);
IHTMLElement element_sub;
HTMLInputElementClass hitem_sub;
element_sub = (document_sub.getElementById("tinymce"));
hitem_sub = (HTMLInputElementClass)element_sub;
try
{
hitem_sub.value = first_name;
// the above will produce...
// InvalidCastException: Unable to cast COM object of type 'mshtml.HTMLBodyCLass' to class type 'mshtml.HTMLInputElementClass'
}
catch { }
}
推荐答案
试试这个:
Windows.Forms.HtmlWindow frame = WebBrowser1.Document.GetElementById("decrpt_ifr").Document.Window.Frames["decrpt_ifr"];
HtmlElement body = frame.Document.GetElementById("tinymce");
body.InnerHtml = "Hello, World!";
它获取框架并将其视为不同的文档(因为它是)，然后尝试从其 id 中获取元素.祝你好运.
That gets the frame and treats it as a different document (because it is) and then it tries to get the element from its id. Good luck.
这应该可以利用 dynamic 数据类型和 InternetExplorer 接口:
This should do the trick taking advantage of the dynamic datatype, and InternetExplorer interface:
private void Form1_Load(object sender, EventArgs e)
{
foreach (InternetExplorer ie in new ShellWindows())
{
if (ie.LocationURL.ToString().IndexOf("tinymce") != -1)
{
IWebBrowserApp wb = (IWebBrowserApp)ie;
wb.Document.Frames.Item[0].document.body.InnerHtml = "<p>Hello, World at </p> " + DateTime.Now.ToString();
}
}
}
这篇关于在 iframe 中的元素上使用 getElementById的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
