如何将新的 javascript 附加到当前的 HTML WebBrowser 控件 [英] How to append new javascript to current HTML WebBrowser Control
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问题描述
我正在尝试插入我自己的 javascript 以在运行时呈现 HTML(index.html - 存在于隔离存储中).从 javascript 调用 c# webBrowser_ScriptNotify.我将如何实现这一目标，这是我实现这一目标的尝试.
I am trying to insert my own javascript to present HTML(index.html - present in IsolatedStorage) at runtime. To get call from javascript to c# webBrowser_ScriptNotify. How I will achieve this, here is my attempts to achieve this.
string script = " <script type=\"text/javascript\"> function scriptNotify() { window.external.notify(\"runtime\");}</script>";
byte[] param = GetBytes(script);
webBrowser.Navigate(new Uri("/index.html", UriKind.Relative), param,"Content-Type: application/x-www-form-urlencoded");
private void webBrowser_ScriptNotify(object sender, NotifyEventArgs e)
{
if (e.Value.ToString().Equals("runtime"))
{
Debug.WriteLine("Call from dynamic javascript");
}
}
static byte[] GetBytes(string str)
{
byte[] bytes = new byte[str.Length * sizeof(char)];
System.Buffer.BlockCopy(str.ToCharArray(), 0, bytes, 0, bytes.Length);
return bytes;
}
更新
这是我在当前打开的 HTML 页面中注入脚本标签的新尝试.
Here my new try to inject script tag in currently opened HTML page.
var scriptString = "var script=document.createElement('script');"
+ "script.type=\"text/javascript\";"
+ "script.InnerHTML=\"function callMe(){window.external.notify(\"runtime\")};\""
+ "document.getElementsByTagName('head')[0].appendChild(script);";
webBrowser.InvokeScript("eval", scriptString);
由于一些系统错误而失败.
its failed with some system error.
System.SystemException was unhandled
Message: An unhandled exception of type 'System.SystemException' occurred in Microsoft.Phone.Interop.ni.dll
Additional information: An unknown error has occurred. Error: 80020101.
堆栈跟踪:
at Microsoft.Phone.Controls.NativeMethods.ValidateHResult(Int32 hr)
at Microsoft.Phone.Controls.WebBrowserInterop.InvokeScript(String scriptName, String[] args)
at Microsoft.Phone.Controls.WebBrowser.InvokeScript(String scriptName, String[] args)
at WebBrowserJSTest.MainPage.webBrowser_LoadCompleted(Object sender, NavigationEventArgs e)
提前致谢.
推荐答案
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