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javascript - WPF Webbrowser invokeScript call external JS function

I have a function defined in a JS file.

Test.js

function fillData()
{
    alert("fill");
}

I have loaded the js file in html file like this.

Index.html

<html>
    <head>
        <title>TEST</title>
    </head>
    <script src="./PathToJs/Test.js" type="text/javascript"></script>  
 <body>
        <h1>Test Page</h1>
    </body>
</html>

I am calling this function from c# using webbrowser InvokeScript method.

webBrowser.InvokeScript("execScript", new Object[] { "fillData()", "JavaScript" });

But the method is not getting called. There is no alert box coming.

If the Javascript method is defined in the HTML itself then fillData() method is getting called.

Let me know how to call the external JS methods using WPF WebBrowser.InvokeScript method.


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