I want to connect a BindingSource
to a list of class objects and then objects value to a ComboBox.
Can anyone suggest how to do it?
public class Country
{
public string Name { get; set; }
public IList<City> Cities { get; set; }
public Country()
{
Cities = new List<City>();
}
}
is my class and I want to bind its name
field to a BindingSource which could be then associated with a ComboBox
As you are referring to a combobox, I'm assuming you don't want to use 2-way databinding (if so, look at using a BindingList
)
public class Country
{
public string Name { get; set; }
public IList<City> Cities { get; set; }
public Country(string _name)
{
Cities = new List<City>();
Name = _name;
}
}
List<Country> countries = new List<Country> { new Country("UK"),
new Country("Australia"),
new Country("France") };
var bindingSource1 = new BindingSource();
bindingSource1.DataSource = countries;
comboBox1.DataSource = bindingSource1.DataSource;
comboBox1.DisplayMember = "Name";
comboBox1.ValueMember = "Name";
To find the country selected in the bound combobox, you would do something like: Country country = (Country)comboBox1.SelectedItem;
.
If you want the ComboBox to dynamically update you'll need to make sure that the data structure that you have set as the DataSource
implements IBindingList
; one such structure is BindingList<T>
.
Tip: make sure that you are binding the DisplayMember
to a Property on the class and not a public field. If you class uses public string Name { get; set; }
it will work but if it uses public string Name;
it will not be able to access the value and instead will display the object type for each line in the combo box.