离下班还有几分钟，做个小玩意儿

Blend 4中经常看到一个输入框，里面有值还有单位，当获取到焦点的时候，就只有值了，修改完值之后，失去焦点，单位又加上了。

class myTextbox : TextBox
    {
        private int _timeValue=100;

        public int TimeValue
        {
            get { return _timeValue; }
            set { _timeValue = value; }
        }

        public myTextbox()
        {
            this.Text = TimeValue.ToString()+" 秒";
            GotFocus += myTextbox_GotFocus;
            LostFocus += myTextbox_LostFocus;
        }

        void myTextbox_LostFocus(object sender, System.Windows.RoutedEventArgs e)
        {
            TimeValue = Convert.ToInt32(this.Text.ToString());
            this.Text = TimeValue.ToString() + " 秒";
        }

        void myTextbox_GotFocus(object sender, System.Windows.RoutedEventArgs e)
        {
            this.Text = TimeValue.ToString();
        }
    }

这样就实现了...