an unhandled exception of type system.nullreferenceexception occurred

Asked Feb 28 '14 at 13:21

Active Feb 28 '14 at 13:21

Viewed 34 times

I getting this error: an unhandled exception of type 'system.nullreferenceexception' occurred

I trying to build a auto updater for some website.. This web not have a Form tag it's working with java script. What the code needs to do it's to get into the site automatic.

In this code:

HtmlElementCollection elc = webBrowser1.Document.GetElementsByTagName("input");
            foreach (HtmlElement el in elc)
            {
                if (el.GetAttribute("type").Equals("button"))
                {
                    el.InvokeMember("Click");
                }
                if (el.GetAttribute("type").Equals("text"))
                {
                    el.SetAttribute("value", textBox2.Text);
                }
                if (el.GetAttribute("type").Equals("password"))
                {
                    el.SetAttribute("value", BaseString + Match[Count]);
                }
            }

What I need to do? Thanks

asked Feb 28 '14 at 13:21

user3120926

1

Well presumably one of those elements doesn't have one of those attributes... – Jon Skeet Feb 28 '14 at 13:22
One of the objects is null - BaseString or Match[]? – ScruffyDuck Feb 28 '14 at 13:23
I put my 2 cents on the last SetAttribute. GetAttribute should return empty string not nulls. But the de-bug-gers exists for these situations. – Steve Feb 28 '14 at 13:25
Thanks every one but all the objects isn't null – user3120926 Feb 28 '14 at 13:25

an unhandled exception of type system.nullreferenceexception occurred

0 Answers0