CommandAttribute.UseCommandManager Property

Gets or sets whether to use a function that manages the command execution. This property applies to WPF projects.

Namespace: DevExpress.Mvvm.DataAnnotations

Assembly: DevExpress.Mvvm.v25.2.dll

NuGet Packages: DevExpress.Mvvm, DevExpress.Win.Navigation

Declaration

C#

public bool UseCommandManager { get; set; }

VB.NET

Public Property UseCommandManager As Boolean

Property Value

Type	Description
Boolean	true to use the command manager; otherwise, false.

Remarks

The UseCommandManager property specifies whether the Command attribute uses the CommandManager to raise the CanExecuteChanged event.

If you set the UseCommandManager property to true, a CanExecute function is triggered each time a user interacts with the application UI. Otherwise, you should call the RaiseCanExecuteChanged method to update your command.

C#

public class LoginViewModel {
    [Command(CanExecuteMethodName = "CanSaveAccountSettings",
        Name = "SaveCommand",
        UseCommandManager = true)]
    public void SaveAccountSettings(string fileName) {
        //... 
    }
    public bool CanSaveAccountSettings(string fileName) {
        return !string.IsNullOrEmpty(fileName);
    }
}

Warning

The CommandAttribute.UseCommandManager property has no effect in DevExpress WinForms MVVM applications. In WinForms apps, call the RaiseCanExecuteChanged method to update the command.