定制文本框可随便输入字符串或数字并限制长度

 /// <summary>
        /// 定制文本框可随便输入字符串
        /// </summary>
        /// <param name="textBoxs"></param>
        /// <param name="maxLength"></param>
        public static void MadeStringTextBox(TextBox[] textBoxs,int maxLength)
        {
            foreach (TextBox digitTextBox in textBoxs)
            {
                digitTextBox.MaxLength = maxLength;
                digitTextBox.KeyPress += new KeyPressEventHandler(stringTextBox_KeyPress);
            }
        }

           //字符串输入无限制
        static void stringTextBox_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar != '\b')
            {
                //非数字
                if (!char.IsDigit(e.KeyChar))
                {
                    e.Handled = false;
                }
            }
        }

/// <summary>
        /// 定制文数字本框(只能输入数字并限制长度)
        /// </summary>
        /// <param name="textBoxs">需要定制的文本框</param>
        /// <param name="maxLength">文本框可输入的最大长度</param>
        /// <returns></returns>
        public static void MadeDigitTextBox(TextBox[] textBoxs, int maxLength)
        {
            foreach (TextBox digitTextBox in textBoxs)
            {
                digitTextBox.MaxLength = maxLength;
                digitTextBox.KeyPress += new KeyPressEventHandler(digitTextBox_KeyPress);//委托事件
            }
        }
    
        #endregion

        //数字文本框按下事件(限制输入非数字)
        static void digitTextBox_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar != '\b')
            {
                //非数字
                if (!char.IsDigit(e.KeyChar))
                {
                    e.Handled = true;
                }
            }
        }