How can I execute Javascript callback function from C# host application

Question

I\'m creating an application in C# that hosts custom web pages for most of the GUI. As the host, I\'d like to provide a javascript API so that the embedded web pages can ac

Answer 1

As @Frogmouth noted here already you can pass callback function name to the LongRunningProcedure:

function onComplete( result )
{
    alert( result );
}

function start()
{
    window.external.LongRunningProcess( 'data', 'onComplete' );
}

and when LongRunningProcedure completes use .InvokeScript as the following:

    public void LongRunningProcess(string data, string callbackFunctionName)
    {
        // do work, call the callback

        string codeStrig = string.Format("{0}('{1}')", callbackFunctionName, "{{ Your result value here}}");
        webBrowser1.Document.InvokeScript("eval", new [] { codeStrig});  
    }