Assigning event TextChanged to all textboxes in Form

Question

Hello I was wondering how can I keep an eye on all textboxes in Form whether in any of them was changed value. I saw some code here

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Answer 1

When you have to deal with nested controls, 1 for loop can't help. You have to use some recursive method or custom stack to loop through all the controls, something like this:

private void RegisterTextChangedEventHandler(Control root){
   Stack stack = new Stack();
   stack.Push(root);  
   Control current = null;     
   while(stack.Count>0){
      current = stack.Pop();
      foreach(var c in current.Controls){
         if(c is TextBox) ((TextBox)c).TextChanged += textChanged;
         stack.Push(c);
      }
   }
}
private void textChanged(object sender, EventArgs e){
   //....
}
//Use it
RegisterTextChangedEventHandler(yourForm);//Or your container ....