Command<T>

Wisej.Web.Command<T>

Namespace: Wisej.Web

Assembly: Wisej.Framework (3.2.0.0)

• Command

  • Command<T>

Implements the ICommand interface wrapping execute and canExecute actions.

C#

public class Command<T> : Command

VB.NET

Public Class Command(Of T)
    Inherits Command

You can use this class to wrap custom commands to bind to controls that implement the ICommandSource interface and need to access the typed data source records. In the snippet below, the CommandDemoViewModel class derives from BindingList<Customer> and allows the commands to directly interact with the typed DataItem property.

public CommandDemoViewModel : BindingList<Person>
{
  
  public Wisej.Web.ICommand SaveCommand { get; }
  
  public CommandDemoViewModel()
  {
    this.SaveCommand = new Command<Person>(
      execute: args => {
        DB.Save(args.DataItem);
      },
      canExecute: args => {
        return  args.DataItem.Name != null &&
            args.DataItem.Age > 0;
      });
  }
}

Now you can use data binding or a code assignment to connect the view model's Add command to a button's Command property.

Parameters

Name	Description
T	The Type of the data passed to the actions.

Constructors

Command(execute, canExecute)

Name	Type	Description
execute	Action<CommandArgs<T>>
canExecute	Func<CommandArgs<T>, Boolean>

Implements

Name	Description
ICommand	Defines a command that can be used for data binding.