DP44/docs/ai/Common/DTS.Common/Classes/DTS.Viewer/Commands.md

source_files, generated_at, model, schema_version, sha256

source_files	generated_at	model	schema_version	sha256
Common/DTS.Common/Classes/DTS.Viewer/Commands/RelayCommand.cs	2026-04-17T16:40:01.838480+00:00	zai-org/GLM-5-FP8	1	24962272b11a45e1

Commands

Documentation: DTS.Common.Classes.Viewer.Commands.RelayCommand

1. Purpose

This module provides an implementation of the System.Windows.Input.ICommand interface designed to delegate logic to methods passed as parameters. It exists to support the MVVM (Model-View-ViewModel) pattern within the DTS Viewer application, allowing UI controls (like buttons) to bind to actions defined in ViewModels without requiring the creation of separate concrete command classes for every action.

2. Public Interface

Constructors

• public RelayCommand(Action<object> execute)

  • Initializes a new instance of the RelayCommand class that can always execute.
  • Parameter: execute — The execution logic delegate.
  • Behavior: Calls the overloaded constructor with null for the canExecute predicate.

• public RelayCommand(Action<object> execute, Predicate<object> canExecute)

  • Initializes a new instance of the RelayCommand class.
  • Parameters:
    • execute — The execution logic delegate.
    • canExecute — The execution status logic delegate (optional).
  • Behavior: Throws an ArgumentNullException named "execute" if the execute delegate is null. Assigns delegates to internal readonly fields.

Methods

• public bool CanExecute(object parameter)
  • Determines if the command can execute in its current state.
  • Behavior: Returns true if _canExecute is null. Otherwise, returns the result of invoking _canExecute(parameter)