[] : Indexer

Reads an item from an array or list by its position, or from a dictionary by its key.

Syntax

{{collection[index]}}
{{dictionary["key"]}}
{{dictionary[expression]}}

Arrays and lists

The index is zero based - the first item is [0].

Data:

builder.WithData("model", new {
    items = new[] {
        new { name = "Widget", price = 10.0 },
        new { name = "Gadget", price = 15.5 }
    }
});

Template:

<p>{{model.items[0].name}}</p>
<p>{{model.items[1].price}}</p>

Output:

Widget
15.5

Dictionaries

A dictionary is read with its key in quotes, or with an expression that gives the key.

Data:

builder.WithData("model", new {
    currency = "EUR",
    rates = new Dictionary<string, double> { ["GBP"] = 1.0, ["EUR"] = 1.17 }
});

Template:

<p>{{model.rates["GBP"]}}</p>
<p>{{model.rates[model.currency]}}</p>

Output:

1
1.17

JSON objects can be read in the same way.

Notes

• An index outside the collection, or a key that is not in the dictionary, gives no value rather than an error.
• A key in quotes reads a dictionary or JSON object. It does not read a property of a C# object - use the property access . for those.
• The index can be any expression, e.g. {{model.items[count(model.items) - 1].name}} for the last item.

See Also

• Property access
• Collection functions