Clear grid pending-change collections

Reset a grid's pending add/delete/update collections after a successful save while preserving displayed rows. Trigger: Controller resetting a grid after a successful save*.

Field	Value
Operation ID	OP-28
Trigger	Controller resetting a grid after a successful save*
Inputs	GridViewModel<T>
Outputs	Added, Deleted, and Updated replaced with empty lists
Primary components	GridRowViewModelExtensions.ClearAll<T>(GridViewModel<T>)
Entry point	src/Web.Mvc/ViewModels/GridRowViewModel.cs

Steps

1. Assign new empty List<T> instances to Added, Deleted, and Updated. Rows is deliberately left intact (BR-64).

Process flow

The following diagram visualizes this operation's control flow.

flowchart TD
    Start([Controller calls ClearAll])
    Clear["Reset Added, Deleted, Updated to empty lists"]
    EndOk(["Rows preserved, pending collections cleared"])
    Start --> Clear
    Clear --> EndOk

Failure and edge-case behavior

• No unexpected failure paths beyond argument-guard exceptions and delegated dependency behavior were identified for this operation.

Related documentation

• Operations and processes
• Business rules

Note: Statements marked with * were inferred from code structure, naming conventions, or contextual evidence where direct confirmation was not available in source artifacts. Statements marked with ** could not be confirmed; treat as unknown until verified.

Sources

• src/Web.Mvc/ViewModels/GridRowViewModel.cs