The foreach loop works on a collection or an array. All of the controls on a form makeup a collection. The foreach loop can be used to loop through each object in a collection. Start a new application and place a few controls of various types on the form. Write the code in Form Load:
private void Form1_Load(object sender, EventArgs e) { // Change the backcolor of each control on the form to red. foreach (Control ctrl in this.Controls) { // ctrl is assigned one control at a time ctrl.BackColor = Color.Red; //Change text of control if (ctrl.GetType() == typeof(Button)) ctrl.Text = "CLICK HERE!"; else ctrl.Text = ctrl.GetType().ToString(); } }
