Click event is not firing when I click a control i

问题:

I have different controls in my usercontrols. And load usercontrols dynamically in my form

UserControl2 usercontrol = new UserControl2();
usercontrol.Tag = i;
usercontrol.Click += usercontrol_Click;
flowLayoutPanel1.Controls.Add(usercontrol);

private void usercontrol_Click(object sender, EventArgs e)
{
   // handle event
}

The click event is not firing when I click a control in usercontrol. It only fires when I click on empty area of usercontrol.

回答1:

Recurse through all the controls and wire up the Click() event of each to the same handler. From there call InvokeOnClick(). Now clicking on anything will fire the Click() event of the main UserControl:

public partial class UserControl2 : UserControl
{

    public UserControl2()
    {
        InitializeComponent();
        WireAllControls(this);
    }

    private void WireAllControls(Control cont)
    {
        foreach (Control ctl in cont.Controls)
        {
            ctl.Click += ctl_Click;
            if (ctl.HasChildren)
            {
                WireAllControls(ctl);
            }
        }
    }

    private void ctl_Click(object sender, EventArgs e)
    {
        this.InvokeOnClick(this, EventArgs.Empty); 
    }

}

回答2:

This should solve your problem.

//Event Handler for dynamic controls
usercontrol.Click += new EventHandler(usercontrol_Click); 

回答3:

Take this:

this.btnApply.Click += new System.EventHandler(this.btnApply_Click);

回答4:

Because events from ChildControls are not propagated to parents. So you have to handle Click event on every child control added to UserControl.

回答5:

1-define a delegate at nameapace

public delegate void NavigationClick(int Code, string Title);

2-define a event from your delegate in UserControl class:

        public  event NavigationClick navigationClick;

3-write this code for your control event in UserControl:

private void btn_first_Click(object sender, EventArgs e)
    {
        navigationClick(101, "First");
    }

4-in your Windows Form than use from your UserControl at Event add:

private void dataBaseNavigation1_navigationClick(int Code, string Title)
    {
        MessageBox.Show(Code + " " + Title);
    }