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如何在WebBrowser控件中注入Javascript？

C# JavaScript .NET

暮色呼如 2019-06-23 17:07:47

如何在WebBrowser控件中注入Javascript？我試過(guò)這個(gè)：string newScript = textBox1.Text;HtmlElement head = browserCtrl.Document.GetElementsByTagName("head")[0]; HtmlElement scriptEl = browserCtrl.Document.CreateElement("script");lblStatus.Text = scriptEl.GetType().ToString(); scriptEl.SetAttribute("type", "text/javascript");head.AppendChild(scriptEl);scriptEl.InnerHtml = "function sayHello() { alert('hello') }";scriptEl.InnerHtml和scriptEl.InnerText都會(huì)出現(xiàn)錯(cuò)誤：System.NotSupportedException: Property is not supported on this type of HtmlElement. at System.Windows.Forms.HtmlElement.set_InnerHtml(String value) at SForceApp.Form1.button1_Click(Object sender, EventArgs e) in d:\jsight\installs\SForceApp\SForceApp\Form1.cs:line 31 at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)有什么簡(jiǎn)單的方法可以將腳本注入dom嗎？

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3 回答

慕尼黑的夜晚無(wú)繁華

TA貢獻(xiàn)1864條經(jīng)驗(yàn) 獲得超6個(gè)贊

出于某種原因，Richard的解決方案在我的終端上不起作用(INSERtAdjacentText異常失敗)。然而，這似乎是可行的：

HtmlElement head = webBrowser1.Document.GetElementsByTagName("head")[0];HtmlElement scriptEl = webBrowser1.Document.CreateElement("script");
IHTMLScriptElement element = (IHTMLScriptElement)scriptEl.DomElement;element.text = "function sayHello() { alert('hello') }";
head.AppendChild(scriptEl);webBrowser1.Document.InvokeScript("sayHello");

這個(gè)答案解釋如何獲得IHTMLScriptElement接口到您的項(xiàng)目中。

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哈士奇WWW

TA貢獻(xiàn)1799條經(jīng)驗(yàn) 獲得超6個(gè)贊

HtmlDocument doc = browser.Document;HtmlElement head = doc.GetElementsByTagName("head")[0];HtmlElement s = doc.CreateElement("script");
s.SetAttribute("text","function sayHello() { alert('hello'); }");head.AppendChild(s);browser.Document.InvokeScript("sayHello");

(在.NET 4/Windows窗體應(yīng)用程序中進(jìn)行測(cè)試)

功能集中的固定案例問(wèn)題。

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