Combobox SelectedItemChanged event in a User Control

Question

I have a user control consisting of a combobox and a label. In my application I need to enable or disable some other controls based on the selected value in that combobox. How do I access the SelectItemChanged event from the application?

Answer 1

See SelectedValueChanged

Answer 2

You need to send the event handler that will handle the event to your custom control. Something similar to the code below:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();

        YourUserControl userctr = new YourUserControl();

        //Sent the event handler linked to OnSelectedValueChanged
        userctrl.HandleSelectedValueEvent(new EventHandler(OnSelectedValueChanged));
    }

    private void OnSelectedValueChanged(object sender, EventArgs e)
    {
        //Do something
    }
}

public partial class YourUserControl : UserControl
{
    public void HandleSelectedValueEvent(EventHandler handler)
    {
        this.comboBox1.SelectedIndexChanged += handler;
    }
}