我无法从 MainWindow 类中的方法访问列表

Question

我是 C# 新手，但我不明白为什么我无法访问 MainWindow 类中的列表。public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();            List<EqualisationSetting> equalisationSettings = new List<EqualisationSetting>            {                new EqualisationSetting { LowerFrequencyBound = 20, UpperFrequencyBound = 250, DecibelRatioChange = 0 },                new EqualisationSetting { LowerFrequencyBound = 250, UpperFrequencyBound = 4000, DecibelRatioChange = 0}            };            ItemsCountroller.ItemsSource = equalisationSettings;        }        private void AddFrequencyBoundButton_Click(object sender, RoutedEventArgs e)        {            equalisationSettings.add(new EqualisationSetting();        }    }它抛出“当前上下文 SoundEditor 中不存在名称‘equalizationSettings’”。

Answer 1

这是因为您的变量位于 MainWindow() 方法内部。尝试这个：

public partial class MainWindow : Window

{

    List<EqualisationSetting> equalisationSettings;

    public MainWindow()

    {

        InitializeComponent();

        equalisationSettings = new List<EqualisationSetting>

        {

            new EqualisationSetting { LowerFrequencyBound = 20, UpperFrequencyBound = 250, DecibelRatioChange = 0 },

            new EqualisationSetting { LowerFrequencyBound = 250, UpperFrequencyBound = 4000, DecibelRatioChange = 0}

        };

        ItemsCountroller.ItemsSource = equalisationSettings;

    }

    private void AddFrequencyBoundButton_Click(object sender, RoutedEventArgs e)

    {

        equalisationSettings.add(new EqualisationSetting();

    }

}