Item Selection Mvc View With Knockoutjs

I am trying to implement a generic ASP.net MVC view. The UI should display a list of available and selected items loading data (basically list of string) from server. User can make

Solution 1:

As user3426870 mentioned, you need to change the value you passed to the checked binding to boolean.

<input type="checkbox" data-bind="checkedValue: $data, checked: isSelected" />

Also, I don't think you need to have selectedItems in the initial data.

Instead in the viewModel, you can do something like:

self.selectedItems = ko.computed(function() {
            return ko.utils.arrayFilter(self.availableItems(), function(item) {
                return item.isSelected();
            });
        });

Solution 2:

It's because you give an array to the binding checked while it's supposed to be a value comparable to true or false (like undefind or an empty string). I would use a function checking if the $data is in your array and returning a boolean to your binding.

Something like that!