User Interface in one class processing in a different class

Question

Hi there My application has an option in the menu that needs to put the text of a textbox into a file. Because in fact there is much more to my application I wanted to isolate the event calls from the actual handlings. To do that my event on my form class calls a method that lives in a different class (named Processing). How can I grab the text of my form class when I am in my Processing class? Should I pass it as an argument? Nah... How about some kind of constructor or other class...? How do I do this? Thanks Emmi

Ryan Alford · Answer

if you need to concatenate multiple textboxes use a StringBuilder object to concat the strings then pass the StringBuilder object to the method as a parameter to do the processing. or if you just want to use the string the StringBuilder class has a .ToString() method that returns the concatenated string.

Satish Kathi · Answer

Pass the text from all the controls as parameters to the function and process the parameters in the function to write to a file

Martin Stephenson · Answer

I come from a delphi background and am just starting to learn C# so forgive me if this is stupid :) Could you create an interface in the form class with a 'GetParameters' method and call back to the form class via the interface method from the processing class ? I delphi we commonly use interfaces implemented in the form class pass a reference to the interface in the constructor of other classes then call ExtlIntf.method from the other classes.

Emilie · Answer

:) sorry because I have in fact a whole lot of controls to get the text from...

Scott Lysle · Answer

I don't know why you would not want to pass the text to the function directly. If your function is static you would not need to worry about doing anything in a constructor anyway; you could just call something like Processor.SaveText(txtSaveThis.Text) and be done with it.

User Interface in one class, processing in a different class