How to get textboxt's text from another class c#

Question

I have a form main and it include a textbox companyname and other form name is Form1 and a class ListViewPrinter.cs under Form1.cs .I just want to get companyname value from ListViewPrinter.cs . I tried to do

TextBox com = Application.OpenForms["main"].Controls["companyname"] as TextBox;

but it gives me NullReferenceException was unhandled by user code .How can I get companyname

Answer 1

You need to either make the class ListViewPrinter static or create an instance of it. Google for these two terms to get an idea.

Answer 2

You may declare main form as static and get the value as you will get it from main.

public static main main_ = new main();

....

string txtValue = main_.companyname;