Using getSelectedItems to get a field value instead of ID

Question

I have been able to use getSelectedItems() without issue so I can perform operations, but from my (hopefully incorrect) understanding, the only other value that is returned is the type of item that's selected (objtype)? I'm not sure how to perform something on getSelectedItems(ctx) to retrieve, for instance, the value in "Name" (ie., SamplePhoto.jpg). I'm thinking I need to use another method to compare the IDs to something which has all of the field info for every file, and then retrieve the name values which have IDs matching those in getSelectedItems(ctx).id

edit: The supplied answers so far do not help since it seems like returning or populating global variables is not possible.

Answer 1

SP.ListOperation.Selection.getSelectedItems() method returns the list of objects that being selected. The object contains two attributes, id and fsObjType, so it is not SP.ListItem object.

The following example demonstrates how to return selected SP.ListItem collection

Example:

function getSelectedItems()
{
    var dfd = $.Deferred(function () {
       var context = SP.ClientContext.get_current();
       var listId = SP.ListOperation.Selection.getSelectedList(); //get selected list Id
       var selectedItemIds = SP.ListOperation.Selection.getSelectedItems(context); //get selected objects

       var list = context.get_web().get_lists().getById(listId);
       var listItems = [];
       for (idx in selectedItemIds)
       {
          var item = list.getItemById(parseInt(selectedItemIds[idx].id));
          listItems.push(item);
          context.load(item);
       }
       context.executeQueryAsync(
         function() {
            dfd.resolve(listItems);
         },
         function (sender, args) {
               dfd.reject(args.get_message());
         }
       ); 
    });
    return dfd.promise();   
}

//Usage
getSelectedItems().then(function(items){
   var fileNames = []; //save file names 
   for (var i =0 ; i < items.length;i++)
   {
       fileNames.push(items[i].get_item('FileRef'));    
   }


});  

Answer 2

You need to call load and executeQueryAsync on the the items returned by getSelectedItems and in the load method you need to pass the internal name of the fields which you want to retrieve. See example below:

var selectedItems = SP.ListOperation.Selection.getSelectedItems(context);
    for (var i = 0; i < selectedItems.length; i++) {
        var itemId = selectedItems[i].id;
        GetName(itemId);
    }

    function GetName(itemId) {
        var clientContext = SP.ClientContext.get_current();
        var currentList = clientContext.get_web().get_lists().getById(SP.ListOperation.Selection.getSelectedList());
        this.singleItem = currentList.getItemById(itemId);

        clientContext.load(this.singleItem, 'Name');
        clientContext.executeQueryAsync(Function.createDelegate(this, this.OnSucceeded), Function.createDelegate(this, this.OnFailed));
    }

    function OnSucceeded() {
        this.NameValue = this.singleItem.get_item('Name');
    }


    function OnFailed(sender, args) {
        alert('Error occurred: ' + args.get_message());
    }