Question

The textbox adds “http://” to what ever the users enters (Ex. “google.com” turns to “http://google.com”) before sending to the web browser, but if the user enters “http://” before their website you get an error.

this is my code:

     private void bargo_Click(object sender, RoutedEventArgs e)
    {
        Uri targetUri = new Uri(System.String.Format("http://{0}", bar.Text));
        web.Navigate(targetUri);

    }

Answer 1

You can test whether bar.text already starts with http:// like this:

    private void bargo_Click(object sender, RoutedEventArgs e)
    {
        string url = bar.Text;
        if (!url.StartsWith("http://"))
        {
            url = "http://" + url;
        }
        web.Navigate(new Uri(url);
    }

If your user enters “https://” or “ftp://” (or gopher://, irc://, ircs://, ftp://, news://, nntp://, worldwind://, telnet://, svn://, git://, mms:// and mailto:) this method will still add “http://” and fail.

A better solution would be to pass a string into web.Navigate() instead of a uri. When you pass in a string, the WebBrowser control automatically adds http:// like a browser would.

    private void bargo_Click(object sender, RoutedEventArgs e)
    {
        web.Navigate(bar.Text);
    }

EDIT: For Windows Phone 7

    private void bargo_Click(object sender, RoutedEventArgs e)
    {
        web.NavigateToString(bar.Text);
    }