How to Use Html.BeginCollectionItem to Pass a Collection from a Partial View to a Controller?

A Partial View passing a collection using the Html.BeginCollectionItem helper

This question deals with passing a collection using the Html.BeginCollectionItem helper in a partial view to the controller. The user has implemented a partial view, a main view, and a controller to handle the data, but the AddRecord() method throws an exception, and the hidden tags for the BeginCollectionItem helper are not inserted around the new fields.

Answer

To resolve these issues, here's a suggested approach:

1. Create a view model to represent the data: Define a view model that aligns with the data you want to edit. This model should include properties for the fields that need to be edited.
2. Create a partial view using the view model: Create a partial view and use the view model as the data model for the partial. Within the partial view, use the Html.BeginCollectionItem helper to render the form elements.
3. Configure the main GET method: In the controller, the GET method should return a list of view models representing the data to be edited.
4. Create the main view: The main view should iterate through the list of view models and render the partial view for each item in the collection. Include scripts to handle adding new items and deleting existing ones.
5. Implement the AddRecord method in the controller: This method should handle posting the data back to the controller. It should validate the data, and upon successful validation, persist the changes.

By implementing these steps, you can effectively pass a collection of data using the Html.BeginCollectionItem helper in a partial view, allowing users to edit the data and submit it to the controller.

The above is the detailed content of How to Use Html.BeginCollectionItem to Pass a Collection from a Partial View to a Controller?. For more information, please follow other related articles on the PHP Chinese website!