Can I inject JavaScript object into WebBrowser?

Question

I need to inject a js file with a class into WebBrowser element for WP7 application, but I get an unknown runtime error:

 webbrowser.InvokeScript("eval", "function Player() {  this.play = function(e) { window.external.notify(e); }}

Is this possible?

Describe your error. You can find it in your IDE. I once encountered with a js inject error because I tried to inject it before the webbrowser is ready. Be sure to place your code in the webbrowser's documentReady() callback — SolessChong
– SolessChong, Commented Jun 3, 2013 at 11:05
There is no documentReady() callback in Windows Phone WebBrowser, but the error seems to be gone when I put this code into Navigated callback. There are no errors now. But it is not working... — Darius V
– Darius V, Commented Jun 3, 2013 at 11:11
I have to confess I haven't tried WP. However things are similar with c# winform. And Navigated() is called after successfully loading the document. — SolessChong
– SolessChong, Commented Jun 3, 2013 at 13:54
Alla Masoud, it is not a duplicate. This problem is more specific than the one you've pointed out. — Darius V
– Darius V, Commented Jun 3, 2013 at 16:26

Martin_G · Accepted Answer · 2013-10-23 11:32:29Z

1

I just encountered this myself.

The problem is that you are not sending in the parameter as a string. eval takes a string as parameter and if you invoke this script with your current parameter it will translate into:

eval(function Player() {  this.play = function(e) { window.external.notify(e); }})

when what you really want to do is:

eval("function Player() {  this.play = function(e) { window.external.notify(e); }}")

So the correct this, try:

webbrowser.InvokeScript("eval", "\"function Player() {  this.play = function(e) { window.external.notify(e); }}\"");

answered Oct 23, 2013 at 11:32

Martin_G

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