Question

I am getting checkedListBox values from database. Based on my checkbox selection it will perform some operation.where i have to write the code for checked items.

Answer 1

You need to subscribe to the CheckListBox.ItemCheck event. You can do this in code in your constructor or override to OnLoad or you can use the WinForms designer properties window events tab.

In code (where checkListBox is the name of your CheckListBox):

public MyType()
{
    this.checkListBox.ItemCheck += new ItemCheckEventHandler(OnCheckListBoxItemCheck);
}

private void OnCheckListBoxItemCheck(object sender, ItemCheckEventArgs args)
{
   //TODO: Do your operation...
}

In the designer:

1. Select your CheckListBox in the designer
2. Press Ctrl+F4 to view the Properties
3. Select the Events tab (indicated by a little lightning bolt)
4. Find the ItemCheck event and double-click – the event handler will be auto-generated and hooked up for you, you just need to add your code to make it do something