Question

I have an event handler for a Textbox and a RichTextBox. The code is identical, but

In handler #1 I do:

RichTextBox tb = (RichTextBox)sender 

In handler #2 accordingly:

TextBox tb = (TextBox)sender 

Doing so I can fully manipulate the sending control. How can I cast the sending object to Textbox or RichTextbox according to its type using

sender.GetType().Name 

and then create the control at runtime and work with it? That way I only need one event handler function: less code, less errors, easier to maintain and DRY 🙂

Answer 1

Depending on what properties you need, you could cast the sender as a TextBoxBase as both the TextBox and RichTextBox both inherit from that sub-class.