IModel.NotifyFieldChanged method
Namespace: NextDesign.Core
Description
Notifies the value change of the specified field.
argument
| Name | Type | Description |
|---|---|---|
| fieldName | string | Field Name |
Return value
- void
Exception
| Name | Exception Class | Description |
|---|---|---|
| Invalid argument | ExtensionArgumentException | When null or an empty string is specified for fieldName |
| Field not found | ExtensionFieldNotFoundException | If the field specified in this model cannot be found |
Annotation
This method can be used to notify the UI layer of Next Design of changes in the field in which the callback function is registered.
A field that gets the value calculated by the callback function cannot detect that the field value has been updated. For example, if the callback function defines a field that gets the field value of a child element, that field will not be aware that the field value of the child element has changed. This means that the UI layer does not automatically follow changes in the source field values. Therefore, when the field value of the calculation source is changed, the affected callback function provides a means to issue an update notification to the registered field.
If the value of the calculated field changes, it is the extension's responsibility to issue an update notification to the field in which the affected callback function is registered.