User Interface in one class, processing in a different class

Emilie

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

5 Replies

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Ryan Alford18y ago
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 Kathi18y ago
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 Stephenson18y ago
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.
Emilie18y ago
:) sorry, because I have in fact a whole lot of controls to get the text from...
Scott Lysle18y ago
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.