Using the <i class="emphasis">ControlBindingsCollection</i> Class

Using the ControlBindingsCollection Class

The ControlBindingsCollection class holds a collection of Binding objects for a control. Here is the inheritance hierarchy for this class:

Object
   MarshalByRefObject
      BaseCollection
         BindingsCollection
            ControlBindingsCollection

You perform simple data binding by adding Binding objects to a ControlBindingsCollection. The ControlBindingsCollection contains stan dard collection methods such as Add, Clear, and Remove. As mentioned in the previous topic, we saw this example in the In Depth section of this chapter:

DateTimePicker1.DataBindings.Add _
    (New Binding("Value", DataSet11, "customers.DeliveryDate"))

And you also can use another overloaded form of the Add method to create a simple data binding, like this:

TextBox1.DataBindings.Add("Text", DataSet11, "authors.au_lname")

You can find the more notable public properties of ControlBindingsCollection objects in Table 21.1, their more notable methods in Table 21.2, and their more notable events in Table 21.3.

Table 21.1: Noteworthy public properties of *ControlBindingsCollection* objects.
Property	Means
Control	Gets the collection's associated control.
Count	Gets the number of items in the collection.
Item	Gets a binding.

Table 21.2: Noteworthy public methods of *ControlBindingsCollection* objects.
Method	Means
Add	Adds a binding.
Clear	Clears the collection.
Remove	Deletes a binding.
RemoveAt	Deletes a binding for the specified item.

Table 21.3: Noteworthy public events of *ControlBindingsCollection* objects.
Event	Means
CollectionChanged	Occurs when collection changes.