Loop through all controls of a Form, even those in GroupBoxes

Question

I\'d like to add an event to all TextBoxes on my Form:

foreach (Control C in this.Controls)
{
    if (C.GetType() == typeof(System.Windows.Forms         


        

Answer 1

Since the Question regarding "Adding an Event to your TextBoxes"; was already answered; I'm providing some explanation and adding an iteration alternative using a for loop instead.

Problem:

• Being Unable to Get Controls Inside a Container.

Solution:

• In order to retrieve the Controls inside a Container you have to specify the Container that Contains the Controls you wish to access to. Therefore your loop must check the Controls inside a Container.
  Otherwise your loop will not find the Controls inside a Container.

i.e:

foreach (Control control in myContainer.Controls)
{
   if (control is TextBox) { /* Do Something */ }
}

• In case you have several Containers:
  Initially iterate the Containers.
  Then iterate over the controls inside the container (the container found in the initial iteration).

Pseudo Code Example on How to use a for Loop Instead:

    /// 
 Iterate Controls Inside a Container using a for Loop. 
    public void IterateOverControlsIncontainer()
    {
        // Iterate Controls Inside a Container (i.e: a Panel Container)
        for (int i = 0; i < myContainer.Controls.Count; i++)
        {
            // Get Container Control by Current Iteration Index
            // Note:
            // You don't need to dispose or set a variable to null.
            // The ".NET" GabageCollector (GC); will clear up any unreferenced classes when a method ends in it's own time.
            Control control = myContainer.Controls[i];

            // Perform your Comparison
            if (control is TextBox)
            {
                // Control Iteration Test.
                // Shall Display a MessageBox for Each Matching Control in Specified Container.
                MessageBox.Show("Control Name: " + control.Name);
            }
        }
    }