Professional asp.net 2.0 Server Control and Component Development

P60
    

public override void Reset()
{
    base.Reset();
    if (IsEmpty)
        return;
    if (IsSet(“BackImageRepeat”))
        ViewState.Remove(“BackImageRepeat”);
}

可否这样写呢？

public override void Reset()
{
    if (IsEmpty)
        return;
    base.Reset();
    if (IsSet(“BackImageRepeat”))
        ViewState.Remove(“BackImageRepeat”);
}

P61

public override void MergeWith(Style s)
{
    if (s == null)
        return;
    if (IsEmpty)
    {
        CopyFrom(s);
        return;
    }
    CustomTableStyle cs = s as CustomTableStyle;
    if (cs == null || cs.IsEmpty)
        return;
    if (cs.IsSet(“BackImageRepeat”) && !IsSet(“BackImageRepeat”))
        this.BackImageRepeat = cs.BackImageRepeat;
}

为何不需调用基类的MergeWith?