Getting value from listbox in another class

Asked Dec 18 '14 at 08:21

Active Dec 18 '14 at 08:30

Viewed 28 times

I'm triying to get the value of the selected item in a listbox which is in another class from the one from I'm trying to get the data.

What I do is the following:

Calling class:

Form1 form = new Form1();

var mail = form.getMail();
var pass = form.getPass();

Main class:

public string getMail() {

    return this.listBoxMail.SelectedValue.ToString();
}

public string getPass()
{
    return this.tb_pass.Text;
}

Always getting NullReferenceException. I ALREADY KNOW what this error means, what I need is to solve it. Any idea about how to achieve this? Thanks in advance.

edited Dec 18 '14 at 08:30

asked Dec 18 '14 at 08:21

Aldridge1991

1,326
6
24
51

Where do you get this error? Which **reference** is `null`? – Shaharyar Dec 18 '14 at 08:31
listBoxMail.selectedValue is null – Aldridge1991 Dec 18 '14 at 08:32
Are you sure listBoxMail is null and not `listBoxMail.SelectedValue` ?? – Blachshma Dec 18 '14 at 08:33
I'm sure listBoxMail.SelectedValue has a value – Aldridge1991 Dec 18 '14 at 08:34
If you claim listBoxMail is null there is no way listBoxMail.SelectedValue even exists. Please debug and answer my question above. – Blachshma Dec 18 '14 at 08:34
`listBoxMail` wouldn't be null. Just check it using **breakpoint** that what is actually null – Shaharyar Dec 18 '14 at 08:35
After I execute "var mail = form.getMail();" I get "A first chance exception of type 'System.NullReferenceException' occurred in FIFA.exe" – Aldridge1991 Dec 18 '14 at 08:36

Getting value from listbox in another class

0 Answers0