Combo box check box object

Question

Hi I have a combobox whose itemstemplate is a check box whos itemsource is a collection of objects say a Person. Each person has a name and so this will be the checkboxes content. However now I want to find out which checkbox in the comboboxs' collection is checked though when I call - (this.MainComboBox.Item[i] as CheckBox).IsChecked - fails because there is no check box. How do I access the IsChecked property of the items in the combobox given that the item source is a collection on objects? Thanks greatly in advance. Person.

Sam Hobbs · Answer

I saw your question about using a listbox of checkboxes and that is a better solution.

Piotr Justyna · Answer

Person I don't think there is a technical posibility to do what you want. This sounds a bit like breaking all best practices :) If you insist (and you don't want to extent your class) you can also keep a separate list of Bools for every checkbox and keeping up to date subscribing to each checkbox click event. Please let me know if this was helpful.

person · Answer

Yes having a property ischecked on the objects would work.......however I dont want to do this (ill mark you as accepted for your input). Basically the itemtemplate contains the checkboxes i dont see why i can access these even though the itemssource of the combobox is a collection of people. Essentially each person object has its name bound to the checkbox content property is there no -- (combobox.Items[0].HostingComponent as CheckBox).IsChecked??? Thanks greatly in advance. Person.

Piotr Justyna · Answer

Dear Person please try to extend your collection's items with a property IsChecked bound to a IsChecked status of each checkbox.

person · Answer

Of course!! However I need multiple selected items in the combo box I know that I can code my own events etc so that I can hold ctrl and the combo will stay open etc etc however its much nicer to have a compact CheckedBox ComboBox. Thanks Person

Sam Hobbs · Answer

Are you sure you must use checkboxes in the combobox? The checkboxes seem unnecessary. You can use the SelectedItem member to get the selected item without using a checkbox.