Input widget class for generating a file upload control. This class is usually used internally by `UIM\View\Helper\FormHelper`, it but can be used to generate standalone file upload controls.
| Inherited | Abstract | Final | Static | Datatype | Header |
|---|---|---|---|---|---|
| string | string render(Json[string] renderData, IContext formContext) | ||||
| bool | bool initialize(Json[string] initData = null) |