How to loop through each indices in a WinJS.UI.ListView to determine if a value already exists.

Question

Hi,

I would like to loop through all the values in a List View in WinJS to determine if a certain value already exists.

The List View is already bound to a data source and the template has 3 values. I want to add a new item to this list view but before adding the item, I would like to ensure that no duplicate values will be added to the list view.

How would I do that.

Thanks,

Rajesh.

Answer 1

Hi Rajesh,

Basically you can use ListView.itemDataSource() to fetch all the items which belong to the listview, search into the array to see if there exist a target item, if no, push it into the array.

var itemDataSource = listView.itemDataSource;

--James

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Answer 2

Hi,

The trick to find all the elements in a ListView is to select all of them and then work on the selected items. Was able to achieve this after seeing this example "HTML ListView reorder and drag and drop sample"

Thanks,

Rajesh.