Events in .NET MAUI MaskedEntry

13 Feb 20252 minutes to read

This section provides information about the events available in the .NET MAUI MaskedEntry control.

ValueChanging Event

The ValueChanging event occurs when the Value property is about to change in the MaskedEntry control. The MaskedEntryValueChangingEventArgs provides the following properties:

  • NewValue: Gets the current value of the MaskedEntry control.
  • OldValue: Gets the previous value of the MaskedEntry control.
  • IsValid: Gets or sets a boolean value indicating whether the input is considered valid based on the mask completion.
  • Cancel: Gets or sets a value indicating whether the event should be canceled.
private void MaskedEntry_ValueChanging(object sender, MaskedEntryValueChangingEventArgs e)
{
    // Access the new and old values
    string newValue = e.NewValue?.ToString();
    string oldValue = e.OldValue?.ToString();

    // Check the validity of the input
    bool isValid = e.IsValid;

    // Cancel the event if needed
    if (newValue == "1234")
    {
        e.Cancel = true;
    }
}

ValueChanged Event

The ValueChanged event occurs when the Value property is changed in the MaskedEntry control. The MaskedEntryValueChangedEventArgsprovides the following properties:

  • IsMaskCompleted: Gets a boolean value indicating whether all the required inputs for the mask are completed.
  • NewValue: Gets the current value of the MaskedEntry control.
  • OldValue: Gets the previous value of the MaskedEntry control.
private async void MaskedEntry_ValueChanged(object sender, MaskedEntryValueChangedEventArgs e)
{
    // Access the new and old values
    string maskNewValue = e.NewValue?.ToString();
    string maskOldValue = e.OldValue?.ToString();
    if (e.IsMaskCompleted)
    {
        await DisplayAlert("Message", "Mask Completed", "close");
    }
}