Describes the grouping of items using a property name as the criterion.
For example, the code below causes a CollectionView to group items by the value of their 'country' property:
var cv = new wijmo.collections.CollectionView(items);
var gd = new wijmo.collections.PropertyGroupDescription('country');
cv.groupDescriptions.push(gd);
You may also specify a callback function that generates the group name. For example, the code below causes a CollectionView to group items by the first letter of the value of their 'country' property:
var cv = new wijmo.collections.CollectionView(items);
var gd = new wijmo.collections.PropertyGroupDescription('country',
function(item, propName) {
return item[propName][0]; // return country's initial
});
cv.groupDescriptions.push(gd);
constructor(property: string, converter?: IGroupConverter): PropertyGroupDescription
Initializes a new instance of the PropertyGroupDescription class.
The name of the property that specifies which group an item belongs to.
A callback function that takes an item and a property name and returns the group name. If not specified, the group name is the property value for the item.
Gets the name of the property that is used to determine which group an item belongs to.