ClearText

        private void Cleartxt()
        {

          

            foreach (Control cntrol in EnumerateControlsRecursive(Page))
            {
                if (cntrol is TextBox)
                {
                    TextBox txt = (TextBox)cntrol;
                    txt.Text = string.Empty;
                }
                else if (cntrol is DropDownList)
                {
                    DropDownList ddl = (DropDownList)cntrol;
                    ddl.SelectedIndex = 0;

                }
            }

        }

 /// <summary>
        /// Recursive function for get controls
        /// </summary>
        /// <param name="parent"></param>
        /// <returns></returns>
        IEnumerable<Control> EnumerateControlsRecursive(Control parent)
        {
            foreach (Control child in parent.Controls)
            {
                yield return child;
                foreach (Control descendant in EnumerateControlsRecursive(child))
                    yield return descendant;
            }
        }