c# - 如何传递包含 this 的类对象并从该类调用方法

Question

我创建了一个处理表单控件跟踪的 formControlTracker 类。这似乎按预期工作。现在，我想在按下保存按钮时从 formControlTracker 类中访问 public string[] getDirtyControls() 方法。我试图访问 cTracker.getDirtyControls(), 总线代码，我认为我实例化的类 formControlTracker 超出了范围。如何在不必重新实例化 formControlTracker 类的情况下访问 getDirtyControls() 方法？

代码片段:

public partial class settingsForm : Form
{
    public settingsForm()
    {

        InitializeComponent();

        settingsTabControl.Appearance = TabAppearance.Buttons;
        settingsTabControl.SizeMode = TabSizeMode.Fixed;
        settingsTabControl.ItemSize = new System.Drawing.Size(0,1);

        formControlTracker cTracker = new formControlTracker(this);

        wLogSettingsFormProperties settingsFormProp = new wLogSettingsFormProperties();

    }

    public void lDirtyControls()
    {

        /*foreach (string con in cTracker.getDirtyControls())
        {
            MessageBox.Show(con);
        }*/
    }

    public void saveSettingsButton_Click(object sender, EventArgs e)
    {
        lDirtyControls();
    }

Answer 1

你可以把它做成类中的一个字段

public partial class settingsForm : Form
{
    private formControlTracker _cTracker;

    public settingsForm()
    {
        //set the field value in the constructor.
        _cTracker = new formControlTracker(this);

    }

    public void lDirtyControls()
    {
        //use the field variable here
        /*foreach (string con in _cTracker.getDirtyControls())
        {
            MessageBox.Show(con);
        }*/
    }
}

阅读此处了解有关 C# 中字段的更多信息:
http://msdn.microsoft.com/en-us/library/ms173118.aspx