Question

I’m trying to call methods from class “Form1” from an other class.
Here’s my Code

namespace WindowsFormsApplication1
{

    public partial  class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            MessageBox.Show("loaded");
            orders.ObjectForScripting = new ScriptInterface();
        }

        private void webBrowser2_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { }
        private void button1_Click_1(object sender, EventArgs e) { }

    }

    [System.Runtime.InteropServices.ComVisibleAttribute(true)]
    public class ScriptInterface
    {
        public void callMe(string currid)
        {
            MessageBox.Show(currid);
            // the following throws security error
            Form1.webBrowser2.Navigate("http://www.mywebpage.com/client/index.php?id="+currid);
        }
    }

}

INFO: I have 2 WebBorwsers. I’m catching events from webBrowser1 for updating webBrowser2.
My problem is, that i cannot call the webbrowser2 methods outside from Form1.

Any Ideas how i can solve this problem?

Answer 1

Your WebBrowser components are not static (this is a good thing), therefore you cannot refer to them directly off of Form1 as your code sample is attempting to do. You must obtain a reference to a Form1 instance and then you can call methods on them so long as they are marked public. Depending on your needs it is probably even better to just pass along a reference directly to your WebBrowser components

Perhaps something like this:

orders.ObjectForScripting = new ScriptInterface(this.webBrowser2);

…

public class ScriptInterface
{
    private WebBrowser _browser;

    public ScriptInterface(WebBrowser browser)
    {
        _browser = browser;
    }
    public void callMe(string currid)
    {
        _browser.Navigate("http://www.mywebpage.com/client/index.php?id="+currid);
    }
}