如何确定用户定义控件数组的单击事件

本文关键字：单击 事件 数组 控件 何确定 用户 定义 | 更新日期: 2023-09-27 18:10:08

我创建了UserControls的Array，其中有1个PictureBox和1个Button。现在我想知道哪个Button是从UserControl的Array中按下的。

UserControl u=new UserControl[20];
for (int j = 0; j < 20; j++) 
{
    u[j] = new UserControl();               
    u[j].BringToFront();
    flowLayoutPanel1.Controls.Add(u[j]);
    u[j].Visible = true;
    u[j].button1.Click+=new EventHandler(sad);
}
private void sad(object sender, EventArgs e)
{ 
    //how to determine which button from the array of usercontrol is pressed?
}

如何确定用户定义控件数组的单击事件

sender参数包含产生事件的Control实例。

像这样:

private void sad(object sender, EventArgs e) {
    var buttonIndex = Array.IndexOf(u, sender);
}

这应该接近您想要的效果。我可以根据你的需要修改。

FlowLayoutPanel flowLayoutPanel1 = new FlowLayoutPanel();
void LoadControls()
{
    UserControl[] u= new UserControl[20];
    for (int j = 0; j < 20; j++) 
    {
        u[j] = new UserControl();               
        u[j].BringToFront();
        flowLayoutPanel1.Controls.Add(u[j]);
        u[j].Visible = true;
        u[j].button1.Click +=new EventHandler(sad);
    }
}
private void sad(object sender, EventArgs e)
{ 
    Control c = (Control)sender;
    //returns the parent Control of the sender button
    //Could be useful 
    UserControl parent = (UserControl)c.Parent;  //Cast to appropriate type
    //Check if is a button
    if (c.GetType() == typeof(Button))
    {
        if (c.Name == <nameofSomeControl>) // Returns name of control if needed for checking
        {
            //Do Something
        }
    }
    //Check if is a Picturebox
    else if (c.GetType() == typeof(PictureBox))
    {
    }
    //etc. etc. etc      
}

我认为这是你想要的:

    if (sender is UserControl)
    {
        UserControl u = sender as UserControl();
        Control buttonControl = u.Controls["The Button Name"];
        Button button = buttonControl as Button;
    }
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