TextBox禁止复制粘贴和数字验证，小数验证，汉字验证

#region 验证小数        /// <summary>        /// 验证小数        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        PRivate void txtRoomArea_KeyDown_ForFloat(object sender, KeyEventArgs e)        {            TextBox txt = sender as TextBox;            //屏蔽非法按键，只能输入小数            if ((e.Key >= Key.NumPad0 && e.Key <= Key.NumPad9) || e.Key == Key.Subtract || e.Key == Key.Decimal)            {                if (txt.Text.Contains(".") && e.Key == Key.Decimal)                {                    e.Handled = true;                    return;                }                e.Handled = false;            }            else if (((e.Key >= Key.D0 && e.Key <= Key.D9) || e.Key == Key.OemPeriod || e.Key == Key.Subtract) && e.KeyboardDevice.Modifiers != ModifierKeys.Shift)            {                if (txt.Text.Contains(".") && e.Key == Key.OemPeriod)                {                    e.Handled = true;                    return;                }                e.Handled = false;            }            else            {                e.Handled = true;            }        }         #endregion

  #region TextBox_TextChanged        private void TextBox_TextChanged(object sender, TextChangedEventArgs e)        {            //屏蔽中文输入和粘贴输入            TextBox textBox = sender as TextBox;            TextChange[] change = new TextChange[e.Changes.Count];            e.Changes.CopyTo(change, 0);            int offset = change[0].Offset;            if (change[0].AddedLength > 0)            {                double num = 0;                if (!Double.TryParse(textBox.Text, out num) && !textBox.Text.Equals("-"))                {                    textBox.Text = textBox.Text.Remove(offset, change[0].AddedLength);                    textBox.Select(offset, 0);                }            }            //            NoteFieldConfigModel noteField = NoteFieldConfigs.First(t => t.FfieldName == textBox.Name);            //            string value = string.IsNullOrEmpty(textBox.Text) == true ? null : textBox.Text;            //            if(string.IsNullOrEmpty(value))            //            {            //                return;            //            }            //if (noteField.FfieldType == 3)            //{            //    textBox.Text = string.Format("{0:N2}", Convert.ToDouble(value.TrimStart(',')));            //}            //if (noteField.FfieldType == 2 && (noteField.FimptClassID == null || noteField.FimptClassID == 0))            //{            //    textBox.Text = string.Format("{0:N0}", Convert.ToDouble(value.TrimStart(',')));            //}        }         #endregion