How to set additionalText for items of MultiComboBox - sapui5

Question

I'd like to add additionalText property while using sap.m.MultiComboBox. My view looks as follows:
<MultiComboBox items="{/list}" width="17rem" >
<core:ListItem key="{Name}" text="{Name}" additionalText="{Price}" />
</MultiComboBox>
But this doesn't seem to work as ListItem is not an aggregation for MultiComboBox.

Answer 1

As of UI5 1.60
The control sap.m.MultiComboBox now supports the property showSecondaryValues which should be used together with additionalText in <core:ListItem>.
<MultiComboBox xmlns="sap.m" showSecondaryValues="true" items="{/ProductCollection}">
<core:ListItem key="{ProductId}" text="{Name}" additionalText="{ProductId}" />
</MultiComboBox>
Sample: MultiComboBox - Two columns layout
UI5 1.58 and below
The problem is that, initially, the control Multi Combo Box was not designed to display more than one attribute in the list. According to the Fiori Design Guideline:
Do not use the multi-combo box if you need to display more than one attribute.
I wouldn't suggest to invest much time to do any hack around this limitation making the app more error-prone and less maintainable. Instead, use an alternative control such as Select Dialog with the option multiSelect: true.
The guideline also mentions Value Help Dialog as an option. But it's currently closed sourced and thus not available in OpenUI5 yet.

Answer 2

Would concatenating the text property work for you? As you don't seem to be able to define a really additional text, a workaround should be something like this:
<MultiComboBox items="{/list}" width="17rem" >
<core:Item key="{Name}" text="{Name}: {Price}" />
</MultiComboBox>

Answer 3

<ComboBox
showSecondaryValues= "true"
items="{
path: '/ProductCollection',
sorter: { path: 'Name' }
}">
<core:ListItem key="{ProductId}" text="{Name}" additionalText = {CurrencyCode}"/>
refer this