Dropdown (Bootstrap)

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Toggleable, contextual menu for displaying lists of links.

When the control is created, selection is set to undefined.

Two onclick events happen when a Dropdown is clicked. When the control is initially clicked, an event is sent. When the user makes a selection, onclick is called again with the text of the selection.

Popovers and Tooltips are supported.

Properties and Methods

Standard properties are supported, plus:

addItem(item, type) Adds an item to the end. type can be "divider", "checked" or "disabled" . Runtime.
appearance Appearance of the alert. Can be success, info, warning, danger.
badge Adds a Badge to the control. Design Time and Runtime.
clear() Clears all items. Runtime.
enable([index,]bool) Enables and disables items. Index can be an item or an array of items. If no index supplied, all items are affected. Bool is true or false. Runtime only.
grouping Is this control part of a group? Choices are No, Start Horizontal, Start Vertical, Middle and End.
filter Display a textbox to input a filter for items to display (Bootstrap 4).
filterPlaceholder Prompt for filter textbox. (Bootstrap 4)
groupStyle The styling to apply to the entire group.
icon An optional icon to appear at the top of the list. Design Time and Runtime.
items Items to show, one per line. Prefix * for disabled, > for selected, ! for heading (not all controls support headings). Just a "-" draws a line between the items. Design Time.
length Current number of items. Runtime.
selection Get the value of the selection (after an item is selected). Runtime.
value Get or Set the title of the dropdown button. Runtime.


Standard events are supported. For this control, the onclick event will be most useful.


// JavaScript
Dropdown1.onclick = function(s) {
    if (typeof(s) == "object") {
    NSB.MsgBox(s + " " + Dropdown1.selection);

' Basic
Function Dropdown1_onclick(s)
  If typeof(s)="object" Then return
  MsgBox s & " " & Dropdown1.selection 
End Function