/// 
        /// 遍曆清除指定的控件        /// 塗聚文 2011-10-18        /// 締友計算機信息技術有限公司        /// 
        ///         public void ClearControl(Control.ControlCollection con)        {            foreach (Control C in con)            {                if (C.GetType().Name == "TextBox")                    if (((TextBox)C).Visible == true)                        ((TextBox)C).Clear();                if (C.GetType().Name == "MaskedTextBox")                    if (((MaskedTextBox)C).Visible == true)                        ((MaskedTextBox)C).Clear();                if (C.GetType().Name == "ComboBox")                    if (((ComboBox)C).Visible == true)                        ((ComboBox)C).Text = "";                if (C.GetType().Name == "PictureBox")                    if (((PictureBox)C).Visible == true)                        ((PictureBox)C).Image = null;            }        }            //在winForm調用方法            Control.ControlCollection coll = this.Controls;            formOperatin.ClearControl(coll);