making a Group boxes call data from entity

Question

I am having trouble getting three different group boxes with check boxes to bring back the data into a data grid. i need it to get all the items checked and bring back the data in the window.

 

What i have so far work one at a time but it will not give me all three only the last checked. i have done this for the three group boxes Carriers, Priority and Cooler

 

private void CheckBox(object sender, RoutedEventArgs e)

{

 var child = new GroupBox();

 List<string> currentlyCheckedCheckBox = new List<string>();

 List<string> currentlyUnCheckedCheckBox = new List<string>();

 foreach (var child in cbCarriers.Children)

 {

 if (child.GetType() == typeof(CheckBox))

 {

 Checking for IsChecked

 CheckBox currentCheckBox = (CheckBox)child;

 if ((bool)currentCheckBox.IsChecked)

 {

 currentlyCheckedCheckBox.Add(currentCheckBox.Content.ToString());

 }

 else

 {

 currentlyUnCheckedCheckBox.Add(currentCheckBox.Content.ToString());

 }

if ((bool)currentCheckBox.IsChecked == false)

{

 return myMain.dtOrders;

}

 }

 }

 if (currentlyCheckedCheckBox.Count == 0)

 {

 currentlyCheckedCheckBox = currentlyUnCheckedCheckBox;

 }

 List<Order> checkedOrders = new List<Order>();

foreach (var item in db.Orders)

 {

 foreach (var checkboxName in currentlyCheckedCheckBox)

 {

 if (item.ShipVia.Trim() == checkboxName)

 {

 checkedOrders.Add(item);

 }

 }

 }

 grdOrders.ItemsSource = checkedOrders;

}