/// <summary>
/// Called on cancel action.
/// </summary>
/// <param name="o">The o.</param>
private void OnCancel(object o)
{
NewSubtopicTitle = string.Empty;
ClearErrors(() => NewSubtopicTitle);
Reset(false);
AddSubtopicCommand.RaiseCanExecuteChanged();
}
/// <summary>
/// Validates the new subtopic title.
/// </summary>
private void ValidateNewSubtopicTitle()
{
var prop = ExtractPropertyName(() => NewSubtopicTitle);
ClearErrors(prop);
if (string.IsNullOrWhiteSpace(NewSubtopicTitle))
{
SetError(prop, "Subtopic name cannot be empty.");
}
AddSubtopicCommand.RaiseCanExecuteChanged();
}
/// <summary>
/// Called when [enable add subtopic].
/// </summary>
private void OnEnableAddSubtopic()
{
Reset(false);
AddSubtopicCommand.RaiseCanExecuteChanged();
}