如何使“点击事件”成为自定义用户控件的？

Question

我在处理动态对象上的鼠标单击事件时遇到问题。 我有 2 个表单，一个名为“FormMain”的主表单和另一个名为“FormView”的自定义表单， 我创建一个基于 PictureBox 类的组件，如下所示：

public class customPB : PictureBox
{
        public customPB()
        {
            InitializeComponent();
            this.Width = 195;
            this.Height = 114;
            this.Visible = true;
            this.Invalidate();
        }
        .
        .
        private void BtnLink_Click(object sender, MouseEventArgs e)
        {
            MessageBox.Show("Button Click Event");
        }
        .
        .
        private void InitializeComponent()
        {
            this.btnAmazon = new Button();
            ((System.ComponentModel.ISupportInitialize)(this)).BeginInit();
            this.SuspendLayout();
            // 
            // btnLink
            // 
            this.btnLink.BackColor = System.Drawing.Color.White;
            this.btnLink.BackgroundImage = Properties.Resources.LinkIcon;
            this.btnLink.Location = new System.Drawing.Point(9, 70);
            this.btnLink.Name = "btnLink";
            this.btnLink.Size = new System.Drawing.Size(34, 34);
            this.btnLink.TabIndex = 1;
            this.btnLink.MouseClick += new MouseEventHandler(BtnLink_Click);

            this.Controls.Add(this.btnLink);
            this.Size = new System.Drawing.Size(195, 114);
            ((System.ComponentModel.ISupportInitialize)(this)).EndInit();
            this.ResumeLayout(false);

        }
}

在我的项目中，我创建了这样的“FormView”表单：

    class FormView : Form
    {
        public FormView(Form windowParent, Point windowPosition ,Size windowSize )
        {
            _windowPosition = windowPosition;
            this.Owner=windowParent;
            InitializeComponent();
            windowParent.LocationChanged += FormView_LocationChanged;
            this.Location = windowParent.PointToScreen(windowPosition);
            this.ClientSize = windowSize;
            this.Show(windowParent);
        }

        private void FormView_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                custPB = new customPB();
                this.Controls.Add(custPB);
            }
        }

        private void InitializeComponent()
        {
            this.SuspendLayout();
            this.ClientSize = new System.Drawing.Size(284, 261);
            this.Name = "OverlayWindow";
            this.DoubleBuffered = true;
            this.MaximizeBox = false;
            this.MinimizeBox = false;
            this.ShowIcon = false;
            this.ControlBox = false;
            this.ShowInTaskbar = false;
            this.Paint += FormView_Paint;
            this.MouseDoubleClick += FormView_MouseDoubleClick;
            this.ResumeLayout(false);
        }
        protected override void OnActivated(EventArgs e)
        {
            // Always keep the owner activated instead
            this.BeginInvoke(new Action(() => this.Owner.Activate()));
        }
   }

在主窗体中我创建新的“FormView”，如下所示：

        private FormView frm1 ;
        public frmMain()
        {
            InitializeComponent();
            FormView frm1 = new FormView(this);
            FormView.Visible = true;
        }

当我单击自定义图片框组件中的 btnLink 时，没有发生任何事情，我的错误是什么？ 谢谢

尝试在动态创建的自定义组件中触发按钮上的单击事件

Answer 1

您必须删除事件处理程序：

protected override void OnActivated(EventArgs e)
{
    // Always keep the owner activated instead
    this.BeginInvoke(new Action(() => this.Owner.Activate()));
}

通过调用 this.Owner.Activate()，您将焦点授予父表单，而 customPB 失去焦点，从而阻止单击事件正常工作。