c# - 如何将子控件的所有事件发送给它的父控件(自定义控件)？

Question

我有一个包含三个子控件的自定义控件(带有 PictureBox 控件和标签的面板)，我想将子控件的所有事件发送到其父控件(自定义控件)。

我知道关于这个问题有很多答案，但我无法用一个简单的解决方案来解决。

这是我的例子

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

下面的代码就是例子，这里UserControl1有PictureBox和Panel，它们的点击事件被挂接到MainForm 即 MyForm 命名。您可以根据您的要求对其进行修改。

用户控件1.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);
        }
    }
}

我的表格.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();
    }
}

编辑:

public partial class UserControl1 : UserControl
{

    public PictureBox ChildPictureBox { get; set; }        

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

现在的形式

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();
    }
}