Call a javascript command in the UIWebView

Question

I want to call a javascript command in the UIWebView page such as:

javascript:document.getElementById(\"MainContent_btnApprove\").click();

however I can't seem to get it to work. Here is what I have so far:

string url = "javascript:document.getElementById(\"MainContent_btnApprove\").click();";
WebView.ScalesPageToFit = true;
WebView.LoadRequest(new NSUrlRequest(new NSUrl(url)));
WebView.ScalesPageToFit = true;

But then I get a message saying:

System.Exception: Could not initialize an instance of the web 'Foundation.NSUrl': the native 'initWithString:' method returned nil.

poupou · Accepted Answer · 2014-11-27 02:10:11Z

2

The ObjC NSURL's selector initWithString: returns nil if the value is not a correct/valid URL (and that varies a bit between iOS versions). The exception you get is Xamarin.iOS telling you that iOS itself did not like the url value you provided.

From your description I think you're looking for something like:

WebView.EvaluateJavascript ("document.getElementById(\"MainContent_btnApprove\").click();");

answered Nov 27, 2014 at 2:10

poupou

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