如何將子控件的所有事件發送到其父控件（自定義控件）？

Question

我有一個包含三個子控件（帶有PictureBox控件和Label的面板）的自定義控件，並且我想將一個子控件的所有事件發送到其父控件（自定義控件）。

我知道有關此問題的答案很多，但我無法通過簡單的解決方案來解決。

這是我的例子

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        UserControl1 uc1 = new UserControl1();
        this.Controls.Add(uc1);
    }
}

public partial class UserControl1 : UserControl
{
    public PictureBox ChildPictureBox { get; set; }

    public UserControl1()
    {
        PictureBox pictureBox1 = new PictureBox();
        pictureBox1.Size = new Size(150, 150);
        pictureBox1.BackColor = Color.Red;
        pictureBox1.Click += PictureBox1_Click;
        this.Controls.Add(pictureBox1);
        ChildPictureBox = pictureBox1;

        this.Click += UserControl1_Click;
    }

    private void UserControl1_Click(object sender, EventArgs e)
    {
        MessageBox.Show("User control click");
    }

    private void PictureBox1_Click(object sender, EventArgs e)
    {
        MessageBox.Show("pic clicked");
    }      
}

Answer 1

以下代碼為示例，此處UserControl1具有PictureBox和Panel ，其單擊事件已掛接到MainForm即MyForm中。 您可以根據需要對其進行修改。

UserControl1.cs

public partial class UserControl1 : UserControl
{
    public delegate void PictureBoxClickHandler(object sender, EventArgs e);
    public event PictureBoxClickHandler PictureBoxClick;

    public delegate void PanelClickHandler(object sender, EventArgs e);
    public event PanelClickHandler PanelClick;

    public delegate void PictureBoxDoubleClickHandler(object sender, EventArgs e);
    public event PictureBoxDoubleClickHandler PictureBoxDoubleClick;

    public delegate void PictureBoxMouseMoveHandler(object sender, MouseEventArgs e);
    public event PictureBoxMouseMoveHandler PictureBoxMouseMove;

    public UserControl1()
    {
        InitializeComponent();
    }

    private void pictureBox1_Click(object sender, EventArgs e)
    {
        if (PictureBoxClick != null)
        {
            PictureBoxClick(sender, e);
        }
    }

    private void panel1_Click(object sender, EventArgs e)
    {
        if (PanelClick != null)
        {
            PanelClick(sender, e);
        }
    }

    private void pictureBox1_DoubleClick(object sender, EventArgs e)
    {
        if (PictureBoxDoubleClick != null)
        {
            PictureBoxDoubleClick(sender, e);
        }
    }

    private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
    {
        if (PictureBoxMouseMove != null)
        {
            PictureBoxMouseMove(sender, e);
        }
    }
}

MyForm.cs

public class MyForm : Form
{
    public MyForm()
    {
        InitializeComponent();
        var userControl1 = new UserControl1();
        Controls.Add(userControl1);
        userControl1.PictureBoxClick += userControl1_PictureBoxClick;
        userControl1.PanelClick += userControl1_PanelClick;

        userControl1.PictureBoxDoubleClick+=userControl1_PictureBoxDoubleClick;
        userControl1.PictureBoxMouseMove+=userControl1_PictureBoxMouseMove;
    }

    private void userControl1_PanelClick(object sender, EventArgs e)
    {
        //Click: Panel on userControl1
    }

    private void userControl1_PictureBoxClick(object sender, EventArgs e)
    {
        //Click: PictureBox on userControl1
    }

    private void userControl1_PictureBoxMouseMove(object sender, MouseEventArgs e)
    {
        throw new NotImplementedException();
    }

    private void userControl1_PictureBoxDoubleClick(object sender, EventArgs e)
    {
        throw new NotImplementedException();
    }
}

編輯：

public partial class UserControl1 : UserControl
{

    public PictureBox ChildPictureBox { get; set; }        

    public UserControl1()
    {
        InitializeComponent();
        ChildPictureBox = pictureBox1;
    }
    //----
}

現在形式

public class MyForm : Form
{
    public MyForm()
    {
        InitializeComponent();
        PictureBox pictureBox = userControl1.ChildPictureBox;
        //now work with pictureBox here
        pictureBox.Click += pictureBox_Click;
    }

    private void pictureBox_Click(object sender, EventArgs e)
    {
        throw new NotImplementedException();
    }
}

Answer 2

我認為您可以執行此操作，但是您應該知道，罕見事件不能鏈接到其他控件。

public partial class UserControl1 : UserControl
{
    public UserControl1()
    {
        InitializeComponent();

        foreach (Control control in this.Controls)
        {
            control.Click += new EventHandler(control_Click);
        }
    }

    private void control_Click(object sender, EventArgs e)
    {
        this.UserControl1_Click(sender, e);
    }

    private void UserControl1_Click(object sender, EventArgs e)
    {

    }
}