Why would you have multiple databindings to a WinForms control?

Question

I'm trying to learn how to use WinForms databinding, but one thing that's confusing me is why you would "Add" a databinding rather then "Set" a databinding? For example consider the following code.

TextBox1.DataBindings.Add("Text", ds,"Customers.CustomerID")

As I understand it this line adds a databinding to TextBox1 that binds its Text property to the CustomerID fields in the Customers table of the ds DataSet.

Yet to me the term "Add" implies that you can add multiple of something. Which confuses me in this example. Why would you have a textbox bound to multiple things? How could that even be possible? Can someone provide an example where multiple bindings make sense?

Answer 1

You can also bind other fields, such as Enabled.

TextBox1.DataBindings.Add("Enabled", myPresentationModel, "IsTextBox1Enabled");