How to add a set number of instances based on number selected from a drop down

[Former Community Member]

I have a form where I would like users to be able to select a number from a drop down, and that number of instances of a specific subform get displayed, eg if they select 3 from the drop down, 3 instances of the subform display. I'm a LiveCycle newbie, so can anyone help me with a simple way to do this?

[Magus069]

to do so you can use the setInstances() method

subform1.instanceManager.setInstances(2);

if you want to make the number of instance out of a selection in a dropdownlist you can use its value to set the instances

subform1.instanceManager.setInstances(dropdownlist.rawValue);

[Former Community Member]

Thanks Magus069, this works for me fine if the original instance of the subform is set to visible, but not when it is hidden (as I would want it to be in this form). Any suggestions for how to get around this?

[Magus069 · Accepted solution]

When a row is hidden when the form is created and you add instances of that row, it will add these rows as hidden because it is using the initial properties of the row.

You would have to set every rows which have been added to visible when they are created.

subform1.instanceManager.setInstances(5);

for (var i = 0; i < subform1.instanceManager.count; i++){

     var frmSub = Main.resolveNode("subform1[" + i.toString() + "]");

     frmSub.presence = "visible";

}

[Former Community Member]

Thanks you so much. A little tweaking and I've got it working exactly how I want it now. Cheers.