Question

i found it is possible to validate checkboxes is selected or not by linq.

i got the code like

btnAgree.Enabled = (from chkbox in Controls.OfType<CheckBox>() select chkbox).Count(b => b.Checked) >= 2;

but my scenario is like i have many check boxes on my win form but i want to check any check boxes inside my group box is selected by LINQ. is it possible but i found no way still. please help me with code.

i got a little code which is bit similar. the code as follows

public static IEnumerable<T> AllControls<T>(this Control startingPoint) where T : Control
{
 bool hit = startingPoint is T;
 if (hit)
 {
    yield return startingPoint as T;
 }
 foreach (var child in startingPoint.Controls.Cast<Control>())
 {
    foreach (var item in AllControls<T>(child))
    {
       yield return item;
    }
 }

}

 var checkboxes = control.AllControls<CheckBox>();
 var checkedBoxes = control.AllControls<CheckBox>().Where(c => c.Checked);

but how to customize this code that it will work with group box where my all check box is located. please guide. another issue is i am using c# v2.0. thanks

Answer 1

btnAgree.Enabled = 
    (from chkbox in groupBox1.Controls.OfType<CheckBox>()
     select chkbox).Count(b => b.Checked) >= 2;

You’re checking the controls of the form.