make-all-asp-form-elements-visible.cs

/// ======================================================================
/// This gist is intended to be copy-and-pasted to the codebehind cs file
/// for a aspx page; please check the InitializeComponent before proceed.
/// ======================================================================

/// <summary>
/// The target page most likelly will have other event handlers, do not overwrite
/// them, just add the correct event hendler to the PreRender event.
/// </summary>
private void InitializeComponent() {
  this.PreRender += new EventHandler(this.ShowAll); // bind the even handler
}

protected void ShowAll(object sender, EventArgs e)
{
  ShowRecursive(MyPageUserInterfaceControl);
}

protected void ShowRecursive(System.Web.UI.Control container)
{
  if(container == null) return;
  foreach(var control in container.Controls.OfType<System.Web.UI.WebControls.PlaceHolder>().Where(it => it != null))
  {
    control.Visible = true;
    ShowRecursive(control);
  }
}